This is a TV test pattern generator with wireless model The components in assemble circuits not difficult, can transmit signal in wireless are video and audio As horizontal line. Along with tone. Using the power of just one 9V battery. This circuit is very suitable for TV repairman orThose who want to test that your […]
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Door Guard Knob Alarm circuit. This is Door Guard Knob Alarm circuit with touch system. When thief caught on the door handle, makes it sound an alarm once. Use the the detector capacitance within the body.This project is a small and economical. Ideal for travelers or those who want security. How does it works The […]
A application a signal amplifier circuit specifically the AC signal amplifier in common electronic circuits. The most these amplifiers will fed back some signal to the input again. To reduce amplify rate down affects to reduce a distortion rate and reduce also the noise signal. The feedback signal may through resistor, transistor or diode Depends […]
This is mini switch system that is controlled light-activate. Which use the inverter gate IC-40106 as main components in compare and controlled switches, and common phototransistors as sensors The Operation of switch has several forms. The most basic way is to press the switch directly. If modern must be controlling by Infrared light or remote […]
This is Alarm light circuit for a general battery charger. It is simplified circuit and cheap, use one transistor BC557 and display with 2 LED. Battery that use with car, motorcycle or Lamps lighting of fishermen. Always is Lead-acid batteries. Which each cell in the battery will have the voltage per cell is about 2.3 […]