Today, in advanced world, electronic touch switches are becoming very popular, they replace mechanical switches and therefore, there is no moving part, so its life is longer. This Touch ON OFF Switch Circuit using IC 555 Timer works as a bistable multivibrator and when we touch the touch point the output changes its state, that […]
Timer Circuits
6V to 12V Battery Monitor Circuit using CMOS IC 7555
Battery is very important in many electronic projects, but however battery voltage goes down slowly and so device may stop working properly. Therefore, we designed this simple 6V to 12V Battery Monitor Circuit using the CMOS 7555 IC to solve this problem. The circuit uses a 7555 timer IC and an LED to indicate the […]
LM3909 IC Based Square Wave Generator Circuit
Electronic projects often need a signal source and this signal can be a pulse or square wave; therefore, a frequency generator is useful for these type of signal source. Here, we have used LM3909 IC which is simple with low power, it works well on small voltage and also the circuit is cheap and easy. […]
Fan Start 10 Second Delay Timer Circuit
In many homes and industries sometimes a fan does not turn ON immediately, here, a fan start delay timer is a circuit that delays the fan start. When we apply power, the fan remains OFF for approximately 10 seconds and then turns ON automatically. Also, we can easily adjust the delay time if required. This […]
30 Minute Delay Timer Circuit using Transistors
This article explains about a simple 30-minute delay timer circuit that uses transistors, the circuit offers a low-cost, easy-to-build solution. Also, it uses common parts like BC547 transistors, resistor and capacitor and because of simple design, beginners can also understand it easily. Therefore, this 30 Minute Delay Timer Circuit using Transistors is useful for applications […]
Simple PIR Sensor Timer Circuit using Transistors
This article presents a simple PIR sensor timer circuit using transistors; the circuit costs little, is easy to build, and operates from a 12 V DC power supply. When the PIR sensor detects motion, the output stays ON for a preset time and then turns OFF automatically after the delay, hence, this feature makes the […]