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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 Because low noise and classic not outdated.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.com/simple-regulator-by-transistor-c1061/ 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

1KHz Signal injector for electronic technicians

12/09/2014 23:10:57 PM

A signal injector is important tools for the electronics technicians it small and cheap. This project is better the simple circuit because it has 1KHz and many frequency harmonic. The normal signal injector has a square wave output about 1KHz. Which > read more

Constant current circuit using LED

12/05/2014 01:01:48 AM

Normally the voltage drop across LED while forward bias will be about 1.2 to 1.4 volts depend on type of LED by has the temperature coefficient is -1.5 mV per degree Celsius. Which similar to the temperature coefficient of junction. between a base an > read more

Rising-edge trigger R-S Flip Flop circuit

12/03/2014 02:47:40 AM

The normal R-S flip flop circuit include of two nade gate are connected together and when need to set or reset then feed the logic signal is “1” instead trigger and use inverter work instead. In Figure 1 suppose begin state of both input is & > read more

Power Battery Saver Circuit

12/02/2014 01:43:15 AM

The power battery saver circuit when use normal lamp. In some times a lamp that is used have too bright. To adjust the brightness with the variable resistor, it would not be appropriate. because power loss too much. For this circuit can save the powe > read more

Super Steady Zener diode circuit

12/01/2014 20:25:19 PM

This circuit is used for controls the voltage battery is steady, which the zener diode apply very low current about 1mA only, cause there is ripple voltage about 1 mV at voltage changing between 10 to 30 volts. As circuit the output is fixed to 8V. I > read more

Complementary common-emitter circuit

12/01/2014 06:18:36 AM

This complementary common-emitter circuit has special feature that can be applied in 2 model. - Low distortion buffer - The low power output circuit How it works In Figure 1 quiescent current flow through T1 and T2 as voltage (U) and R1, R2 sequence. > read more

The CMOS current controlled oscillator circuits (CCO)

11/30/2014 20:24:52 PM

We can use a CMOS nand gate or inverter gate and two transistors into the current controlled oscillator circuit (CCO). In Figure 1 use two inverters are connected together as a astable multivibrator circuit. Figure 1 the normal astable multivibrator > read more

Non-inverting integrator circuit using op-amp

11/29/2014 18:34:03 PM

This is non-inverting integrator circuit that is improved that below. The obstacles of old integrator as Figure 1, is Connection of RC is at a virtual ground, cause C into the capacitive load across output of op-amp. It makes an impact on the Slew ra > read more

Voltage to Frequency Converter Circuit

11/28/2014 07:04:15 AM

This voltage to frequency converter circuit use the CA3130 OP-Amp ICs, that linearity Of changing is very well up to 0.5% and Temperature coefficient of less than 0.01% per degree Celsius. In Figure 1, IC1 act as the frequency generator is controlled > read more

Simple resistive load

11/26/2014 18:56:47 PM

Sometimes we need to use a resistors that without capacitance or inductance. We always use the carbon resistors. But some working to need the resistor that has also many high power. Which we cannot use the carbon resistor because it has maximum power > read more

Tremolo Effect Circuit using uA741

11/25/2014 02:28:23 AM

The tremolo effect circuit widely used, making noise in the electronic music scene. The height of the modulation signal by low frequency between 1 Hz to 10 Hz. This result will sound good, When frequency be modulated in sine. Figure 1 Tremolo Effect > read more

Noise Filter for Stereo system

11/24/2014 10:57:15 AM

In the receiver, stereo radio station. Usually have more noise than listening in mono. Because, the stereo system is splits signals-to-noise ratio. (S/N) There level lower, cause interference, in mono with less. becausePhase noise of the 2-back phase > read more

Dual DC power using 2 terminal transformer

11/21/2014 04:35:11 AM

There are many ways to build the dual power supply from a transformer that has one secondary coil.This good way as Figure 1 use two bridge diodes. The first section is normally working, others section (D1-D4) will work by AC signal from C1 and C2. To > read more

Hum Filter using electronic coil

11/19/2014 10:38:16 AM

There are many ways to filter the hum noise from AC line (50 Hz) from audio signal away. A frequency filter usage is a simple ways that include RLC as the electronic coil. In Figure 1 is the specific frequencies filter. Figure 1 the simple specific f > read more

Analog To Digital Converter Circuit Using Simple Parts

11/17/2014 11:05:28 AM

Usually an analog to digital converter circuit or A/D that need to use the high accurate devices and and high difficult. But this circuit, The error of all devices does not affect the accuracy of the circuit. We just use the reference voltage only. H > read more

Low Noise Pre Microphone Amplifier

11/15/2014 10:10:39 AM

Here is two low noise Pre microphone amplifiers. Which is simple circuit but high quality sound,includes devices that are selected very well. This circuit can be used to all normal microphone, for example: the dynamic microphone of Europe zone that h > read more

DIY Cheap Resistance Decade Circuit

11/13/2014 21:07:05 PM

Here is DIY resistance decade tool for testing and calibration, because it can be substituted into a circuit with a all standard value. This ideal is cheapest that use resistors and wires only. In each experiment, a resistor must be involved at all t > read more

Symmetrical Harmonic Oscillator circuit.

11/10/2014 23:03:28 PM

This is the Symmetrical Harmonic Oscillator by the harmonic 3 that without tuning circuit because normal circuit use harmonic frequency always has the tuning frequency circuit. This is Astable multivibrator Oscillator circuit that has the crystal acr > read more

27MHz CB Amplifier Circuit

11/09/2014 04:18:22 AM

The V-MOS FET number VN66AF (as Figure 1)is produce of the Siliconix company, for outstanding features are as durable and high gain. Most application of this is a normal power amplifier circuit. It can be used as the RF amplifier circuit. Figure 1 th > read more

Simple 555 ICs tester circuit

11/03/2014 10:32:12 AM

Most IC-555 is used to generate frequency, and sometimes we need to know. Is it good or bad? But normal multimeter cannot check it. Thus, I make a simple 555 ICs tester circuit. Which is tested correctly and faster. How it works Resistors R1-R3 acts > read more

Electronic Head or Tails Circuit

11/01/2014 21:57:35 PM

This is an electronic head or tails circuit ,that same really the head or tail playing very little head by following several steps. -First of all,turn on switch, LED display show digit “0”. -Secondly, press the button “rotate” then the coins > read more

True RMS Converter circuit

10/30/2014 03:23:59 AM

This is an true r.m.s. Converter circuit. Normally we need a device with low tolerances,and very accurate tuning. But this circuit is used a simple device, plain and decent quality. This circuit use principle of automatic gain control (AGC). Which in > read more

Dual RS232 port selector circuit

10/29/2014 04:57:42 AM

This is a Dual RS232 switch selector circuit to one computer that have one RS232 port into two ports for two computers. In circuit is simple and cheap without ICs so easy to build. Normally, we will always use the D connector because strong, can be p > read more

20A/ 12V-24V DC Motor controller using TL494 and IRF1405

10/28/2014 00:53:33 AM

This is the high quality PWM 12V-24V DC motor controller circuit for that has the low voltage battery checker system, working with soft start, adjust pulse frequency, use for 12V or 24V battery at current up to 20A. Although small and simple, but cou > read more

One button code Switch

10/25/2014 22:25:09 PM

The most code switch will be a key number 1 to 10 is good. But when I press a number key often until has track, making it possible to guess the code. This circuit use the normal door bell switch is the code enter. The code include pulse short and lon > read more

Current Transformer AC Load LED Indicator circuit

10/24/2014 23:31:41 PM

This is the LED indicator for show AC current load, that use the transformer and LED as based of circuit. Sometimes we need to detect the large AC current. One way is the LEDs is connected with the resistors and the diode 1N4001 networks. But this ha > read more

VHF Dip Meter circuit

10/23/2014 23:18:05 PM

This is a simple VHF dip meter circuit.The DIP meter is the frequency meter by use the LC resonance circuit that adjustable until the frequency show peak amplitude. The circuit include variable frequency generator circuit, rectifier and a moving coil > read more

Digital logarithmic sweep signal generator circuit

10/23/2014 00:14:33 AM

This is a Digital logarithmic sweep signal generator circuit by use the average digital, It is designed to use together with the frequency generator by voltage controller. How it works From the circuit in figure 1 is the 14-bit binary counter circuit > read more

Tape head preamplifier using UPC1032

10/22/2014 09:09:38 AM

This pre-tape circuit is cheapest for beginner only. And easy to builds because use one IC-UPC1032 only as Figure 1. Fig1: The circuit diagram This is stereo can connect to the tape header that resistance between 200-600 ohms at output amplitude abou > read more

5 volts DC Regulator Without Transformer Using MOSFET

10/22/2014 02:37:38 AM

This is 5 volts DC Regulator power supply that without the transformer so small size, use the MOSFET is based. It is suitable the digital circuit. Caution! This circuit requires very careful to create. Because there is a high voltages many areas. The > read more

10V to 350V Adjustable Regulator DC Power Supply

10/21/2014 07:32:36 AM

Here is an adjustable regulator DC power supply circuit that can be provided the output high voltage is 10V to 350V. It use the transistor is based so we use often use them. Now, a transistor can tolerate more high pressure. For example; in this circ > read more

Electric fish shocker circuit

10/18/2014 05:04:18 AM

This is the simple electric fish shocker circuit or fish stunner. It helps in catching fish easier, it use 12V battery to convert to 220V AC. We use few parts so easy and cheap. How it works This circuit convert voltage from 12V battery to AC 220 vol > read more

NE5532 datasheet; Dual low noise operational amplifier

10/17/2014 07:16:08 AM

NE/SA/SE5532/5532A: Internally-compensated dual low noise operational amplifier The 5532 is a dual high-performance low noise operational amplifier. Compared to most of the standard operational amplifiers, such as the 1458, it shows better noise perf > read more

5 watts Class A amplifier using NE5532 and MJ2955

10/16/2014 20:28:54 PM

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How to build the PCB by yourself

10/11/2014 10:24:54 AM

Creating a PCB is difficult. If you want to create your own PCB. I find good information on various websites. For the benefit of friends. This week, I collaborated with Xander to show you how to make your own printed circuit boards (PCBs) using a las > read more

Automatic duty factor controlled circuit

10/11/2014 06:03:50 AM

We can use the schmitt trigger to generate the simple square wave. The duty factor of output waveform will be determined by the input waveform. But the threshold level is the importance. In Figure 1 will have the output while input waveform as Figure > read more

Linear opto isolator circuits

10/10/2014 11:07:05 AM

This is the linear opto isolator circuits that use a few parts and cheap. In circuit we use the opto compiler ICs number of MOC 5010 as based. It can be used many ways. For example ; separate the circuit from the power line, send audio signal, Electr > read more

LM386 audio amplifier circuit with PCB

10/09/2014 19:15:48 PM

This is an audio amplifier that can be used with a small 9 volt Battery Operated,Current use as little as 5 milliamps.And amplification up to 500 mW. Which is sufficient to expand the sound from a sound about or the CD Walk Man out to the small speak > read more

Cheap adjustable 0-30V 2A Laboratory DC Power Supply

10/09/2014 05:48:27 AM

This 0-30V power supply is the variable voltage Regulator at 2A max, by used IC-723 for control volt stable regulated. The 2N3055 power transistor for boost up current to 2 Amp. It suitable for general electronics work shop. Because it is a simple ci > read more

0-30V,0-2A adjustable voltage and current regulator

10/08/2014 03:17:22 AM

This is the 0-30V,0-2A adjustable voltage and current regulator that developed from the cheap adjustable 0-30V 2A Laboratory DC Power Supply project using LM723 is used widely, for a long time. This project can control the amount of current flow is m > read more

True R.M.S Converter circuit

10/07/2014 00:05:24 AM

This is a true r.m.s. Converter circuit. it use parts that easy to find and the normal quality. But we must to use normally parts that Low tolerances and more precise tuning. This use principle of the automatic gain control circuit; AGC). Which inclu > read more

Duty factor meter circuit

10/04/2014 06:41:20 AM

This is the simple duty factor meter circuit. We use mosfet and meter and more few part. So easy and cheap than others tools. How it works. The duty factor of square wave signal can be measure by the pulse counter circuit or the oscilloscope. Figure: > read more

Cheapest signal cleaner circuit

09/29/2014 18:23:18 PM

Here is the simple low noise filter circuit for any FSK signals that weak and have noise. This use few parts so easy and cheap. Fig 1: The schematic of this project As Figure 1 is the schematic diagram. This circuit include the low filter circuit thr > read more

Traffic light controller circuit

09/28/2014 09:15:10 AM

Today, let’s look at 2 model of traffic light circuits. They use the LEDs for display and the digital circuit as based. This circuit include IC-4027,CD4017,IC-555 and a few parts so easy and cheap. First model circuit. This circuit is designed > read more

CD4027B_datasheet of Dual J-K Flip-Flop

09/26/2014 05:40:03 AM

Here is the datasheet of the CD4027BC dual J-K flip-flops are monolithic complementary MOS (CMOS) integrated circuits constructed with N- and P-channel enhancement mode transistors. Each flip-flop has independent J, K, set, reset, and clock inputs an > read more

The experience to Buy the components at icstation.com

09/25/2014 02:47:47 AM

Sometimes I can not buy electronic devices. Because, far from an electronics store. No products you want, or expensive. I always use the online order. I envy my friends who live in America. That they can order electronics from amazon.com. There are a > read more

Simplest slave flash trigger circuit

09/24/2014 10:23:42 AM

- This is a simplest slave flash trigger circuit. - It will help the slave flash immediately works almost simultaneously with the main flash. - This circuit better than others circuits because without the external power supply. - Since (look at circu > read more

Power Amp Super Bridge 120W by IC TDA2030

09/23/2014 04:14:35 AM

This be Super Bridge 120W Power Amplifier by IC TDA2030 for you like the circuit amplifies that use the integrated circuit. and Transistor BD249 or TIP31 or TIP41 or C1061 and BD250 or TIP32 or TIP42 or A671. It is nice circuit and easy to use. Schem > read more

Inverter 12V to 220V 100W by Transistor

09/19/2014 03:45:46 AM

This circuit is 100 watt power inverter using power transistor 2N3055. It is designed for you that need to use appliances at outdoor or no electrical places. Someone use it in car or the high mountain etc. The maximum output power of this circuit abo > read more



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