10 Key Code Lock Switch Circuit
Simple Key code lock switch circuit using IC-4017 digital, uses 10 switch bottom to control output by Relay. No microcontroller so easier and cheaper!
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April 27, 2019
All controller, motor speed driver,switches,timer,sensor,and more : Timer switches • DC motor speed control • Delay timers • Light switchs • SCR controls • Light dimmers • Infrared remote control system • and more…
5-30 minuts timer circuit using IC 555
This is timer circuit uses a 555 IC timer. it small,compact,portable. For the snooze alarm by buzzer when some 5 to 30 minutes. It make easy with pcb layout
March 24, 2019
8 simple touch switch circuit projects
Many how to make simple touch switch circuit project. To build easy. Using transistor and IC like 555 timer, 4011 CMOS, flip-flop IC.
March 3, 2019
Speaker protection circuit
It will prevent the speaker from too over high power output may speaker damaged it use transistor and relay cut off as safe.
December 28, 2018
Simple long duration timer circuit
Simple long duration timer circuit
The Simple long duration timer circuit using OP-AMP, If build the RC timer only that long time delay we need too many resistors and capacitors may be error [...]
November 29, 2018
Circuit diagram of Power Battery Saver using PWM 555
Power Battery Saver Circuit
This is power battery saver circuit using an IC-555 timer. The lamp is controlled with a PWM mode by adjusting of potentiometer VR1. And, PNP power transistor drives a lamp. Sometimes…
November 5, 2018
2 channel DC motor driver circuit on a saving model
How to rotate dc motor in both direction
It is easy if you control DC motor in a single direction. Sometimes you think. How to rotate DC motor in both direction. You are not worried. There are many…
October 28, 2018