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Adjustable LED flasher-first potentiometer using Arduino

11/19/2016 03:57:31 AM

Today we will make a Adjustable LED flasher-first potentiometer using Arduino. It is first time that we use it. First to use potentiometer on Arduino Arduino has the analog input pin (A0 to A5 for read any signals. When we apply voltage to potentiome > read more

Simple Button Digital Input using Arduino

11/16/2016 01:24:26 AM

Today we learn the simple simple Button Digital Input using Arduino it is very easy. The Arduino has Digital I/O PINs. Which “I/O” is Input and Output We used the output of Arduino to display the LEDs. Today we need to use the switches as digital > read more

3 LED running-int code by Arduino

11/11/2016 11:42:20 AM

This is the easy 3 LED running circuit or LED Chaser using Arduino. We will learn code “int” to define the variable. -variable Is representatives of the various Let’s write code Sample one LED flasher. Which we’ve already made easiest > read more

Blink 2 LED flasher using Arduino

11/06/2016 09:22:13 AM

Today we will make a 2 LED flasher using Arduino (UNO) Usual we use a transistors circuit to make two LED flasher. This we will study programing C code on Arduino. It is easy to learn. Step to step by Chayapol. Lets go! Figure 1 Define pictograms,eas > read more

Simplest programing C on Arduino UNO

10/30/2016 23:47:54 PM

Today, let’s do a one LED flasher. Which we use the Arduino Software (IDE). Although, difficult to use, because the text mode. But it works completed, the most popular and free. Step by step as 9 years boy learning. 1. Define symbol that human > read more

Basic SPST (Single-Pole,Single-throw) switch

10/06/2016 03:52:05 AM

Mechanical switches permit or interrupt the flow of current. They are also used to direct current to various points. The basic knife switch is the simplest switch. OPEN = OFF , Closed = ON. This is called an SPST (Single-Pole,Single-throw) switch. Th > read more

Easily draw circuit by easyEDA

09/25/2016 02:42:23 AM

My son draw circuits by a pencil, which is not beautiful at all as Figure 1. We found a way to draw a good and perfect, we can do circuit simulation, PCB design, Electronic circuit design online for free. It works well on Mac, Linux, Wind > read more

How to fix unclear the 7 segment led display

09/15/2016 06:01:16 AM

I’ve bought a cheap digital frequency counter kits. It works great, can measure frequency up to 1GHZ in 19$ only. It use 8 the LED 7 segment display. But it’s a little brighter so cannot clearly read the value. Figure 1 low brightness LED > read more

How to calibrate touch screen GARMIN GPS

09/03/2016 14:27:31 PM

I like taking the kids to tour upcountry. We purchased a GARMIN GPS to reduce stray. I like it because it can Map update any lifetime and cheap. But yesterday have a problem white screen with a message that touch dot. I try to calibrate touch screen. > read more

Simple big robot toothbrush

08/19/2016 23:08:08 PM

Today, chayapol make a toy for younger sister. It is a Simple big robot toothbrush. The principle is very simple, It vibrates with movement, without direction and control. He took it to play with the cat great fun. Figure 1 the Simple big robot tooth > read more

4 LED voltage indicator circuits-[Edit]

08/04/2016 02:48:33 AM

This is four circuits of LED voltage indicator are simple and easy to builds for check voltage battery and others, use as zener,transistor,LM339 and more The post 4 LED voltage indicator circuits-[Edit] appeared first on Electronic projects circuits. > read more

Pulse Generator Oscillator 32.768KHz by watch crystal

07/23/2016 03:38:12 AM

My Friend need to like a Pulse Generator Oscillator circuit that stable frequency at 32.768KHz with watch crystal,for digital CMOS binary counter, so he tell to me even low prices. I think may be used the watch crystal and IC4069 or IC4049 inverter C > read more

How to install arduino driver Software (IDE) on ubuntu 16.04

07/04/2016 23:02:49 PM

Chayapol want to learning arudino microcontroller for making the robot. Now he like ubuntu os because it very fast and good no ads and no virus. He like to play minecrafe game on this os it very fast and smooth. How to install arduino driver Software > read more

Make Lamp as power load

06/17/2016 07:30:10 AM

We like to test the functionality of a high current power supply by simple power load. It is 12V lamp 50 watts. But it had a high temperature. Require a docking station proper on long time trials. Today Chayapol build docking for this lamp. Figure 1 > read more

How to use CH340G Arduino Nano 3.0 on mac osx

05/20/2016 20:22:26 PM

Today we try to use CH340G Arduino Nano 3.0 on Mac OSX. In the beginning it was a problem. But it can be easy to fix. We liked it, because small, very cheap, and it can be exactly the same as the Arduino UNO. Friends recommend using the Arduino Ardui > read more

Vibration Sensor Circuit Kit

05/13/2016 20:04:45 PM

Simple vibration and motion sensors can be made using a pendulum switch, mercury switch or one of many other methods. The Vibration Sensor Kit uses no moving parts to detect vibration. Instead, a piezo speaker element is used as a sensitive vibration > read more

DIY pocket pack solder

05/02/2016 20:18:10 PM

This is DIY pocket pack solder. To portable and lightweight with the division lead to shorter. Normally we always to buy big lead because worthy than small. My son buy new solder; DIA: 0.8mm 1LB TIN/LEAD 60/40. But He does not like it because too muc > read more

Cheap adjustable 0-30V 3A Laboratory DC Power Supply

04/09/2016 22:41:37 PM

This is cheap adjustable 0-30V 3A Laboratory DC Power Supply circuit. It is high efficiency regulator circuit by using IC regulator UA723 and TIP3055 as power transistor so easy to install. It is designed to protect over current load maximum 3A Techn > read more

Simplest automatic solar led light circuit

03/23/2016 04:40:12 AM

This is simplest automatic solar led light circuit that my son try to make it for basic small solar charger. This circuit is a simplest circuit. He trial it to learn about solar LED light, and makes it all by himself. He needs one LED light that brig > read more

Simple High power LED flashlight by Chayapol

03/17/2016 23:29:04 PM

This is simple hight power LED flashlight,we use 24 LEDs super bright for display and 3 AA batteries and resistor for limit current so cheaper. Chayapol buy this LED flashlight but is low light. Thus, he want to builds the new high power LED flashlig > read more

Simple solar plant watering alarm circuit

03/09/2016 09:13:17 AM

This is a simple Solar plant watering alarm circuit. It will sound alarms when the soil is dry. The trees have died. It the solar sell is 6V DC power supply. Thus saving convenience and does not require batteries.No noise at night. How the circuit wo > read more

Fast blinking LED bike light circuit

03/05/2016 02:39:48 AM

This is a fast blinking LED bike light circuit For safety when the bike at night. We use two-NPN-PNP transistor oscillator circuit and RC circuit only show on 4 LEDs use low current. We take the four LEDs to parallel because each LED use voltage abou > read more

First Arduino leaning Board

02/27/2016 23:37:21 PM

Many friends suggested that my son should learn to use Arduino micro controller before. So it is First Arduino UNO R3 Board R3 leaning Board of Chayapol. The Arduino is the concept characteristics Platform consists of Hardware and Software. Used for > read more

Second study English with Electronic components

02/23/2016 22:12:01 PM

This is a second study English that my son use learn it by the electronic components. Today we will know three words below. 1. Different Q: Is the resistors different the capacitor? A: Yes, the resistor is different the capacitor. 2. Similar to Q: Ar > read more

How to make a simple series circuit

02/08/2016 21:33:54 PM

Today, Chayapol experiment on the simple series circuit. To understand current flow and voltage across all devices in circuit. Parts he will needs 1. R2____1K 0.25 watts resistors 2. R1____100 ohms 0.25 watts resistors 3. the power supply 4. the brea > read more

DC Boost Converter circuit 3.3-5v to 12V-13.8V

02/01/2016 04:55:33 AM

This is DC boost converter circuit that can use 3.3V to 5V power supply source into DC 12V-13.8V output max current 100mA. It is switching circuit better than old circuit. You can increase low voltage battery to high voltage load as you need with hig > read more

Simple temperature to voltage converter circuit

01/18/2016 01:36:15 AM

This is a simple temperature to voltage converter circuit or an Electronic thermometer circuit there. Which will operate in a temperature range of 0 to 24 degrees Celsius (32 to 75 degrees Fahrenheit). The output rate of 500mV per degree Celsius. Whi > read more

First Study English with Electronic components

01/16/2016 21:20:51 PM

Chayapol like Electronics but do not like English is not the primary language of us. I had the idea to teach him, to start learning English with Electronic components as Figure below. 1. Transistor Q: What is this? A: It is a transistor. 2. Capacitor > read more

Lego automatic LED flasher light by Chayapol

01/13/2016 22:53:13 PM

Today Chayapol want to build the simple automatic flasher circuit. It is special that it will be light on dark. This circuit use 5 parts only and cheap. He like to play LEGO very much so builds Lighthouse tower by LEGO block. How circuit works As Fig > read more

Tiny emergency light circuit

01/12/2016 17:27:30 PM

This is first tiny emergency light of Chayapol. It is very small, use LED display when power outage,use transistor instead relay use AA battery charger. How it works As Figure 1; Tiny emergency Light circuit use a few parts include the two AA nickel- > read more

Convert a galvanometer to voltmeter By Chayapol

12/27/2015 03:15:42 AM

My son want to make a simple DC voltmeter on 0-10V range by Convert a galvanometer to voltmeter.Galvanometer DC1mA is cheap and easy with one resistor only. The post Convert a galvanometer to voltmeter By Chayapol appeared first on Electronic project > read more

Cheap air compressor time delay circuit

12/21/2015 07:55:33 AM

This is a cheap air compressor time delay circuit. We especially design Air conditioning or refrigerators The post Cheap air compressor time delay circuit appeared first on Electronic projects circuits. > read more

Digital volume control circuit schematic

11/30/2015 21:26:35 PM

This is digital volume control circuit that Can be applied to the normal volume of a power amplifier. When press switch S1 adds up the volume and press switch S2 to reduce the volume down. How it works IC1 is a 555 CMOS Timer Single IC will be connec > read more

High Temperature fire Alarm Circuit using transistors

11/26/2015 23:07:05 PM

This is high temperature fire alarm circuit, when the temperature rise exceeds the limit, it will sound the siren rang out. It is easy to use with transistor circuit to detects heat. Then, a loud noise of the sirens with IC packages. How it works We > read more

4W 12V Fluorescent lamp driver circuit using IC555

11/19/2015 00:41:55 AM

This is 4W 12V fluorescent lamp driver circuit using IC555 as main parts and for 12 volts battery at consumption current 300 mA, maybe used to 12V Adapter The post 4W 12V Fluorescent lamp driver circuit using IC555 appeared first on Electronic proj > read more

FM transmitter circuit without coil

11/15/2015 10:16:54 AM

This is FM transmitter circuit without Coil,using inverter digital IC as main and controlled frequency is precise by crystal. Figure 1 the circuit diagram In Figure 1 is RF oscillator circuit which use a inverter IC1/2 and ceramic crystal filter 10.7 > read more

Modem wireless router overheating troubleshooting

11/10/2015 23:21:57 PM

This is Modem wireless router overheating troubleshooting by Chayapol. If your Internet is very slow in the daytime is The modem wireless router is overheat. My son measure its temperature was about 55 degrees Celsius. As Figure 1 So we figured out a > read more

Simple 12V 2A DC power supply by Chayapol

11/04/2015 04:39:50 AM

Today, Chayapol builds a simple 12V 2A DC power supply for a 12V solar pump. It is an Unregulated power supply because load is DC motor only. How to works I teach son to understand the working principle of this projects. The main principle, we use th > read more

PIC microcontroller 2 led flasher circuit using PIC16F627

10/24/2015 08:40:22 AM

Today, We will try the PIC microcontroller 2 led flasher circuit using PIC16F627. Because like this circuit Which we can set ON-OFF of both LEDs for easy, long and accurate. Note: I intend to teach his son, love electronics, He like to experiment wit > read more

DIY Make Solderless Flexible Breadboard Jumper Wires by Chayapol

10/16/2015 06:35:15 AM

DIY Make Solderless Flexible Breadboard Jumper Wires by Chayapol A jumper wires in the experiment electronic circuits labs on Breadboard is indispensable. Normally we can buy them from general electronic store. Which is cheaper as Solderle > read more

Make a PIC Programmer Box case with My son’s LEGO

10/09/2015 02:53:35 AM

My son is learning the microcontroller. He told The PIC programmer Without Box. So maybe we will catch part of its circuit. It may be damaged He likes to play LEGO much. It created as the box case. For the PIC programmer tools. Starting with making a > read more

Where you buy Electronics Components

10/07/2015 11:46:02 AM

Hi, The key issue of building electronic projects and experimental electronic circuits,is the electronics components are expensive and difficult to find. I ordered them Through these sites. It gives me comfort, do not drive yourself to the store to b > read more

PIC microcontroller led flasher circuit using PIC16F627A

10/01/2015 21:24:30 PM

This is microcontroller led flasher circuit using PIC16F627A as first PIC microcontroller learning of mine son. it is basic for really beginner. Important issue,we have to make The PIC micro controller is easier. Children 8 years old, he does not und > read more

PIC microcontroller power supply circuit by Chayapol

09/12/2015 12:15:57 PM

This is 5V portable power supply circuit for or PIC microcontroller power supply circuit. As The PIC16F627A microcontroller use 5 volts DC power supply. The post PIC microcontroller power supply circuit by Chayapol appeared first on Electronic proje > read more

PIC16F627A Datasheet PIC Microcontroller

08/24/2015 11:45:45 AM

This is PIC16F627A Datasheet as good PIC Microcontroller ICs, Work 2.0-5.5V,Running 0-20MHz,In-circuit serial programming,Program memory 1.75 Kbyte... The post PIC16F627A Datasheet PIC Microcontroller appeared first on Electronic projects circuits. > read more

PIC16F627a Datasheet PIC Microcontroller

08/23/2015 03:53:46 AM

First time for PIC-Microcontroller What is PIC Microcontroller We should start learning with the Microcontroller that are easy programming. I and my son would start at PIC Microcontroller of Microchip. Which are easy to buy, cheap and a simple set of > read more

Why use Microcontroller

08/17/2015 01:15:09 AM

I will tech my son learn Electronics as homeschooling. It is very good that the device Microcontroller are cheaper, find simple and easy to learn. I have not used it yet. Now, learn along with my son. We hope that, learning this time, friends would h > read more

Walkie talkies automatic charger circuit

08/08/2015 12:33:45 PM

Today I have new circuit idea but old collection. This is Automatic battery charger circuit for old motorola radio. This is a small motorola radio charger circuit, for the 9 nickel-metal hydride battery holder, if the battery is charged to 11 Volts. > read more

Two Automatic battery charger circuit

07/30/2015 17:29:13 PM

A lead-acid battery charger circuit  is most popular though it will very large size than others battery type. But them have advantage are : cheap, easy to buy and long life if correctly uses. The charging is best importance. When I had 10 year old > read more

First tone controls projects for electronic students

07/04/2015 21:10:01 PM

This is the first pre tone for you. Since easiest to builds all components is assembled on one PCB, so small size and cheapest. I like the transistors pre amplifiers with tone controls. Because low noise and classic not outdated. For students, colleg > read more

Peak Hold LED stereo VU meter using L1424

06/20/2015 04:40:50 AM

This VU-meter can show peak signal on 12 LEDs stereo system and use L1424 as main so easy to build. The importance of the VU-meter, In addition to shows the level of signal and add colorful on the audio system or others tools. The Peak-hold VU-meter > read more

Electronic VU meter by LM3914 and LM3915

06/17/2015 10:36:31 AM

Here is High performance LM3914/LM3915 VU meter projects that widely popular can display with 20 LEDs on stereo or mono with 10 LEDs for all audio system.And can easily build and cheap you must happy when use it. This electronic VU meter set is circu > read more

LM8365 alarm digital clock for beginners

06/13/2015 05:19:31 AM

Today I highly recommend the alarm digital clock Another interesting project. Suitable for beginners It is small, easy to build, use IC number IC use LM8365 is at the heart. Includes all functions within a single IC. Thus, it is more efficient than t > read more

Building the electronics workbench table by Chayapol

06/12/2015 09:52:25 AM

We moved to a new office up more space. I have a large work desk, length 220cm, width 85 cm, height 80 cm. Fit for the room. We like this desk, but expensive. so want to build myself. Can fit into the space, proper the height, for my son. We choose t > read more

TA8225 BTL Amplifiers circuits

06/11/2015 19:44:33 PM

There is my friend want a TA8225′s PCB. But I not have it. Thus I search on internet. The TA8225 is BTL audio power amplifier for consumer application. It is designed for 45W high power, low distortion and low noise. It contains various kind of > read more

Making a solar powered small fountain

06/10/2015 10:23:19 AM

Chayapol do everything as the solar cell system. I think it is useful, therefore, to buy a solar powered small fountain Kits it created a lot easier. The main device consists of - The 1.2 watts 6v 120mA solar cell Solar cell as Figure 2 - the small f > read more

Dual-Output Adjustable Linear Regulated Power Supply Kit

06/07/2015 03:05:30 AM

Today I and my son want to builds the Dual-output adjustable power supply. On our sites have this Dual power supply 3V,5V,6V,9V,12,15V with LM317,LM337 but it big size scale so we find more kit internet. This projects contains everything you need to > read more

0-45V 8A DC switching power supply circuit

05/29/2015 04:13:26 AM

Today I recommended the 0-45V 8A DC switching power supply circuit is a circuit that is capable of higher common linear circuit but it has a lot of detail. Special feature: - Output voltage……….0-45V - Output current continuous 8 hou > read more

Automatic LED solar light 2 by chayapol

05/27/2015 00:11:41 AM

Chayapol and I build the Automatic LED solar Light is version 2. It has a higher performance, is brighter as Figure 1 compares the version 1 (left) and the version 2 (right). Because we use LED grow larger, but use a 12V battery as the original. Figu > read more

Super solar 3W LED light by Chayapol

05/19/2015 10:42:32 AM

Chayapol need lighting around the house at night. But that point is no AC lines, it’s hard wiring. We happen to have the 12V battery, LED lamps and Solar cell. Thus was born the idea to create the super solar 3w LED light. It saves electricity > read more

Make children table for modeling clay

05/18/2015 01:43:27 AM

Chayapol want to build a table for younger sister to using a modeling clay. We are very fortunate to be able to buy wood chips easily and cheaply. Chayapol as homeschool boy loved so much artificial wood. But we are not the professional woodworking. > read more

Hi-Fi preamplifier with tone controls project circuit

05/16/2015 01:44:31 AM

The circuit features tune smooth bass, and treble is not spicy, with a very low distortion. Please below : more Features -Use low noise transistors -Frequency response range : 20Hz-20KHz -Total Harmonic Distortion Noise 0.001% at frequencies 20Hz-20K > read more

My son use Portable Electronic scale for recycling

05/14/2015 02:19:21 AM

Weight Pocket Hook Scale I will teach my children to be aware of Recycling is important, We will collect all the cardboard. To sell as his pocket money. Every time I teach it to save weight with a weight pocket hook scale. The plus numbers, the decim > read more

Gain Clone 40W+40W power amplifiers using LM3875

05/08/2015 05:40:33 AM

This is Gain Clone amplifiers circuit that sound quality is very good. We use a IC as main parts is LM3875, produced by the National Semiconductor, IC is the highest power amplifier 56watts at 8 ohms speaker, As well as IC amplifier Gain Card that ve > read more

100-150W Super Hybrid Low THD Power amplifiers using STK-4048

05/04/2015 00:05:28 AM

This amplifier series circuit is very special that low distortion about 0.003% only. The heart working of this circuit is the hybrid IC of Sanyo. It is usually found in expensive audio equipment. The ICs that uses has three wattages to choose the num > read more

FM transmitter 88-108MHz using two transistors and 1.5V battery

05/01/2015 03:43:32 AM

This is also the 88-108 MHz FM transmitter circuit that use 1.5 volts battery power supply source and use two-transistors so easy to builds and small size circuits. Figure 1 the schematic diagram Figure 2 the components layout The coil-L is 8 turns o > read more

How to use a Battery Tester by Chayapol

04/30/2015 08:48:17 AM

A basic electronic learning what is needed is a battery. Because I do not want him to use the AC-line, which could be dangerous. So we store it in a lot of batteries. Sometimes project electronic does not work well, may have caused Batteries broken, > read more

RF immune power supply with RFI elimination

04/28/2015 02:02:56 AM

This is the RF Immune power supply with RFI elimination for Amateur radio. A typically Radio transmitters use High-frequency transistors as current driver so can cause very severe electromagnetic. Therefore, The power supply must be able to make the > read more

1.5V FM transmitter using a varicap diode and two transistors

04/26/2015 12:15:35 PM

This circuit is a 1.5V FM transistor circuit that use also two transistors like others circuit before. But this circuit is special that we use a varicap diode. Figure 1 is a schematic diagram - This circuit use the varicap diode number: SD111 or will > read more

How to modify to New switch replace old dimmer

04/25/2015 11:57:05 AM

I moved into a new house, The original owner was a British. Outlets and switches In a system of all England. Electrical system of the UK is 230V 50Hz. My wife did not like the warm white applicable to the general dimmer. Because it takes a keen eye a > read more

How to use LED with 3V battery by Chayapol

04/25/2015 04:59:41 AM

Today, my son Learn to use the LED for the 3V battery. As we know, a voltage of about 1.8V LEDs like the most,Proper light, not heat and Power consumption of approximately 10mA to 20mA only. Figure 1 he measure the voltage of two AA 1.5V battery in s > read more

Old low noise pre tone using RC4739

04/23/2015 01:34:15 AM

A stereo pre amplifiers with tone control circuit that has been popular for more than 40 years is this circuit which use the RC4739 as main components. Due to its features that the bass heavy, and treble sound is crystal clear. Due to its features th > read more

First times electromagnet learning for my son

04/20/2015 03:38:02 AM

My son like to play the magnet a lot like general children. And He read science books Found content with magnetic. He read science books Found content with magnetic. We take the 24 SWG Coated copper wires turns on the diameter core of about 5mm screw > read more

FM transmitters, 90-100MHz using two transistors and low voltage

04/19/2015 04:10:57 AM

Today lets to see the simple FM transmitters,90-100MHz that use two transistors, apply power supply with 1.5V battery The coil-L is 8.5 turns of 22 swg wire wound with a inside diameter air core of about 5mm. Then stretch the coil to width of 9 mm.  > read more

How to basic use LEDs

04/17/2015 03:55:36 AM

My son is very interested in the LED. He want to created the simple LED flasher circuit. But we should learn the principles of the LED before. Started to use the LED circuit as Figure 1. Includes Battery, Resistor and LED - Its shape - symbols (When > read more

50W-75W Stereo power amplifier using TDA2050

04/14/2015 10:23:11 AM

We used the TDA2030 to build many power amplifier projects, but they have lower power than 30 watts. Today, we try to use the TDA2050, which has the output power about 50 watts that shape and easy to use as well. This project is stereo that easy to b > read more

Low volts stereo preamplifier with tone control circuit

04/04/2015 05:29:18 AM

This is the simple stereo amplifier for headphone with tone control circuit that use 1.5V X 2 only. It is used for mini MP3 player or other small source. I like it that use a few parts and low power. How it works To begin with this circuit will conne > read more

Today we will learn about the resistors

04/02/2015 08:19:03 AM

Hi, I intended to learning homeschool for my son. Which he like the Electronics projects circuits same me. I have teach a simple electronic learning, may not correspond to the process of learning from the normal school. Today we will learn about the > read more

Simple Two Transistors AM Transmitter Circuit

03/28/2015 08:30:05 AM

This simple AM transmitter include of many parts. There is a transistor Q1 act as increase the audio signal (AF) from the crystal microphone and a resistors-R3 that limit amplitude of sound signal is increased by Q1 The transistor – Q2 generate > read more

98-100MHz FM transmitters using one transistor and 1.5 volts battery

03/12/2015 20:40:26 PM

This is the small FM transmitters using one transistor and 1.5 volts battery as power supply, in 98MHz to 100 MHz FM frequency range. The coil-L is 8 turns of 18 swg wire wound with a inside diameter air core of about 5mm. Then stretch the coil to wi > read more

500 watts MOSFET power inverter using SG3526-IRFP540

03/06/2015 00:24:06 AM

As the 200 watt inverter Many people want to create a project of large power inverter about 500 watts. In order to use the multiple appliances at the same time. And can also be used on a large bus as a bus or coach, too. Adding a 200watt into 500 wat > read more

The Op-amp IC tester circuit

03/02/2015 00:55:37 AM

This is an simple op-amp IC tester circuit that cheap and easy to build. for test many op-amp ICs fast check. How it works In Figure 1 is the schematic diagram of this tool, that is used to generate the square wave. The working of circuit for the OP- > read more

Let’s build the digital multimeter using ICL7107

02/15/2015 04:04:17 AM

We can modify the dc digital meter circuit to smart full function multimeter, that versatile available. For example : measure DC voltage, ACV, DC Amp meter, AC Amp meter and as the Ohms meter etc. Try to build this projects to use it really worth Ful > read more

Super boost bass by UA741

02/03/2015 02:09:26 AM

This General purpose boost bass circuit is low pass filter that famous for decades over the years,can be used to increase the bass to the amplifier gain. The characteristics similar to a normal tone control circuits, It is designed for high frequency > read more

Simple Long Duration Timer using OP-AMP ICs

01/29/2015 22:13:59 PM

Simple Long Duration Timer using OP-AMP ICs If you need to build the RC timer circuit that long time delay we need to use too many resistors and capacitors. This may have caused the error is quite large. From the change to the device degradation and > read more

2W(2 km) 88-108 MHz frequency VHF/FM transmitter

01/23/2015 23:48:54 PM

This is FM transmitter in VHF range. As Figure 1 Sonar with up to 2 watts, when used with a supply voltage of about 24V. In the case of applications typically do not want a high transmission. This circuit requires only one power supply 9V Only. If us > read more

The twin-T complementary amplifier circuit with filter selector

01/17/2015 22:10:49 PM

The filter circuit of this main circuit will sent to through to the signal that middle frequency. At the same time is attenuated the others frequency into input signal to R1 through the base of emitter circuit as complementary form (T1/T2). And the f > read more

Amp meter for CAR

01/14/2015 07:04:19 AM

Sometimes disorders of cars on the electrical system. Can not be analyzed by the voltage of the battery, always. Using an ammeter to check. It will help to diagnose the problem better. This circuit is an amp meter LED display is not afraid of vibrati > read more

Dynamic Compressors without power supply

01/11/2015 01:28:32 AM

This dynamic compressors circuit that The reduction rate of the signal up to 20 dB at input between 100 mV to 10 volts. This circuit does not use external power. But used part of the input signal into a power supply. To reduce size of the signal. A p > read more

Power outages prediction circuit

01/08/2015 22:52:54 PM

This circuit can be used to prevent a power failure. Example: Microcomputer systems. This circuit will send logic pulse “1″ shortly before the power goes out completely. To trigger the power outage protection circuit for working. Or use t > read more

2 watts + 2 watts Stereo Using Three LM386

01/07/2015 05:45:24 AM

This is 2 watts + 2 watts Stereo small amplifiers using three LM386 ICs. It is cheap and easy to builds for beginner. A basic of amplifier The most normal power amplifier as Figure 1 that connected to directly a positive of speaker and the negative t > read more

Donkey Sound Generator Circuit

01/01/2015 07:42:25 AM

This is a Donkey sound generator project that easy to builds because use simple components include three IC-555 and LM386 and more little parts. Although at present we use Micro controller IC because small. But some times it is hard to find, so this > read more

Small christmas LED flasher circuit with sound

12/26/2014 08:31:34 AM

The Christmas LED flasher circuit is small and easy and cheaper than this circuit. It suitable for beginner. How it works In Figure 1 is the Schematic diagram of this project. First the LED display section, there are IC1- CD4093 as main, inside IC ha > read more

Cheap led christmas light flasher circuit is controlled by audio

12/22/2014 02:51:52 AM

This project is designed to meet the needs of create particular project. In order to get the Christmas and New Year. I suggest the project get to the upcoming festival. This project is an LED chaser that is controlled by the voice signal. This princi > read more

The transistor lat as SCR trigger

12/22/2014 02:25:43 AM

This circuit works similar to a SCR. When the trigger input is high, Both transistors Q2(PNP transistors) and Q1(PNP transistor) will work. Therefore, a current flow to the base pin of Q2, it has voltage 0.7 volts at resistor R1. When cutting the act > read more

Current-controlled Sawtooth Generator Circuit

12/19/2014 02:53:52 AM

This Sawtooth wave generator circuit include of the frequency oscillator is controlled by current. Which can generate the sweep frequency in wide range. Suitable to be applied in the field of music equipment and a narrow pulse output. Also we are abl > read more

Low-volts Crystal Frequency Generator Circuit

12/18/2014 02:26:20 AM

We can easily use FET and Crystal to generate the frequency and In particular, this circuit use very low voltage. It can operate at a supply voltage to 1.5 volts only and at crystal frequency 100 KHz to 10 MHz. The crystal is connected to between the > read more

Simple Crystal oscillator Circuit

12/17/2014 11:01:18 AM

This is simple crystal oscillators that provided square wave of 1MHz to 10MHz, Use an inverter gate IC and control frequencies with crystal. A oscillator or a frequency generator provide waveform out in various forms. For example : sine wave, Triangu > read more

Many the 12V 1A power supplies circuits

12/14/2014 20:11:22 PM

Mr jafar need to use the 12 volts 1 amp DC Power Supplies. In my sites has many circuits related them. - Cheap and old but sure, use transistor and zener as main http://www.eleccircuit. > read more

D/A converter circuit for motor controller

12/13/2014 21:19:55 PM

We control easily a motor to stop and rotate. If need to control it on linear feature is speed high-low difference so use this circuit. In Figure below, we use the 4 bit comparator circuit that output to the input of EXCLUSIVE-OR gate. Then, it is fe > read more

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