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:: Home » Controls & Timers » Page 3

Controls & Timers

10 Key Code Lock Switch Circuit

Last Updated on: July 13, 2022 by Apichet Garaipoom
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! Read more

Categories Controls & Timers Tags Digital switch circuits 35 Comments

5-20 minuts timer circuit using IC 555

Last Updated on: July 6, 2022 by Apichet Garaipoom
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 Read more

Categories Controls & Timers, 555 Timer Tags Digital Timer Alarms 37 Comments

8 simple touch switch circuit projects

Last Updated on: April 17, 2022 by Apichet Garaipoom
touch switch circuit diagram

Many how to make simple touch switch circuit project. To build easy. Using transistor and IC like 555 timer, 4011 CMOS, flip-flop IC. Read more

Categories Controls & Timers, 555 Timer Tags IC-4011, IC-555, switches circuit diagram 4 Comments

Speaker protection circuit

Last Updated on: April 16, 2022 by Apichet Garaipoom
Speaker protection circuit with PCB

It will prevent the speaker from too over high power output may speaker damaged it use transistor and relay cut off as safe. Read more

Categories Controls & Timers Tags Protection circuits, High Power Amplifiers 19 Comments

Simple long duration timer circuit

Last Updated on: November 23, 2021 by ElecCircuit.com
op-amp long 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 […] Read more

Categories Controls & Timers Tags Delay timers, op-amp 3 Comments
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Categories

  • Amplifiers (94)
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