To begin with, Power ON Delay Circuit using IC 555 give time gap between power ON and circuit starts. When trigger comes, IC 555 work in monostable mode and give one output pulse for set time; furthermore, resistor R1 and capacitor C2 make timing part for delay. When the circuit is OFF, the output stays […]
Timer Circuits
Frequency Divider Circuit
To begin with, a Frequency Divider Circuit take signal with high frequency and give signal with lower frequency, also it changes the signal in way to reduce frequency. Two common ICs used for this: IC 4017 Decade Counter: IC 555 Timer: Circuit Working: Parts List: Components Values Quantity Resistors (All resistors are 1/4 watt unless […]
Amplifier Speaker Turn-On Delay Circuit
As name say this Amplifier Speaker Turn-On Delay Circuit wait few seconds before connecting speaker to amplifier. When amplifier is first turn ON then big “thump” noise can happen and this delay stop that bad sound. Circuit Working: Parts List: Components Values Quantity Resistors 33k 1/4 watt 2 1k 1/4 watt 1 Capacitors Electrolytic 100μF […]
AC Power Outlet with Timer Circuit
Unlike a standard wall outlet, this AC Power Outlet with Timer Circuit incorporates a built-in timer; as a result, it functions as a timer plug, also known as an outlet timer. Also, we can plug other device into it. Furthermore, a small chip called the 555 timer acts as the brain of the circuit, also […]
Simple IC 555 Oscillator Circuits
Simple IC 555 Oscillator Circuits is a 555 timer chip which is common and easy to use; also it is good for many projects. But for some circuits we must know how it works when not active. Two main pins: IC 555 Pinouts Here is a list that shows what each pin on the chip […]
Automatic Power Delay OFF Circuit
This Automatic Power Delay OFF Circuit is like small helper to remind us to turn OFF things; also we can connect it with our device with the time frame like 1 hour, 2 hour as it stops the power by itself. Moreover, it is very useful if we want to keep nightlight ON for some […]