555 Timer IC IC 555 timer IC is one of the most popular integrated circuit chip used for a variety of applications such as astable, monostable, bistable multivibrators, timer circuits, oscillators, PWM (Pulse Width Modulation), PPM...
A door opening alarm circuit is an indicator or a security alert device which activates while opening the device attached door. And the alarm remains ON as long as the door is kept open....
AC to DC Voltage Doubler Circuit A voltage doubler is a circuit that produces an output voltage that is double the applied input voltage. The below diagram is an AC to DC voltage doubler...
A touch switch is a device that operates with the touch action of an object or sensible material. It is used in hobby circuits to high-end consumer electronics for various applications. Below are a...
A tone generator circuit can be used for various applications such as alarms, bells, indicators, etc. A tone generator consists of a square, triangle, sawtooth periodic wave generator circuits, commonly square wave generators. Such periodic signals...
A continuity tester is a device used to determine the existence of an electrical connection between two points. It can indicate whether a wire, cable or circuit is electrically closed or not between the...
These circuits can be used for different automatic light sensing projects including automatic night lamp, automatic street light controller, dark sensor circuits, etc. Automatic night lamp circuit using IC 555 and LDR An automatic night...
LM317 battery charger with overcurrent protection circuit The circuit is a 6V LM317 voltage and current control battery charger circuit which generates a regulated 6V DC output. The transformer T1 steps down the input...
This infrared burglar alarm can use at doors, entries, etc. To alerts us, when somebody crosses through the IR beam. As the IR beams are invisible to human eyes, the circuit can work as a hidden security device. To...
IC 555 Simple LED Flasher An LED flasher circuit can be used as an LED blinker, vehicle indicator light, signal flashlight, etc. A simple blinking circuit is basically a circuit to continuously ON and...
