This key code switch circuit is a type of electronic circuit that is created to replace conventional normal key switch. Without inserts a keys. But you can press the number code instead of unlock keys. We do not have to carry a load key and do not worry about your keys are lost. We just must remember to commit to a code only. Feature of this circuit - For in this circuit uses a four numeric code number and this code number can be changed up to one thousand numbers. - The case with other people to know our original code. They code can be changed easily. The circuit is designed to have the reset system, immediately enter the wrong code. so can prevent pressing a random numeric code. Because in this circuit the switches are set to the ten numbers, be the code switch 4 pcs. and be reset [...]

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