5-30 minuts timer circuit using IC 555

This timer circuit uses a 555 IC timer number. This small,compact and portable. For the snooze alarm by buzzer when some 5 to 30 minutes. It makes clear the brain is ready to continue to work.

When the switch S1 to enter a power supply circuit, it will be ready to go.The circuit includes a circuit IC1 Mono Stable for the delay.The switches S3-S6 as election time.If selected by S3, 5 minute timer.S4 is located at 10 minutes.S5 timer for 15 minutes and S6 is scheduled for 30 minutes.If you want to set for 10 minutes, switch S4 is followed by a switch S2 to start all the time.Work is that when switch S4 will allow the current flowing through R4 will flow through the switch S4 to C2.Acting with a delay charge and discharge completely.Then send a signal to Pin 7 and 6 of IC1 resulted BZ1 beeps Buzzer out.

The time value is determined by the value R2, R3, R4, R5 and C2.If you want to set up a long time, it increases the R and C, but would spend less if it reduced the R and C.


How to build this projects
This projects is very easy because use a few components. As show in Figure 2 is PCB layout and the component layout.
So must be extra careful is. Devices with terminals such as IC-555 , Electrolytic capacitors and the buzzer will are connected match terminals only.
the PCB layout of 5-30 minuts timer alarm circuit using IC555
Figure 2 is PCB layout and the components layout

This project worked my son test it on the breadboard. Below.

He test at 5 minuts.

The copper PCB layout


  1. thuhil August 29, 2015
  2. nilesh March 7, 2016
  3. ganesh April 13, 2016
  4. Soumik July 11, 2016
  5. Martin Cloutier September 22, 2016
  6. yesh November 7, 2016
  7. viewer101 May 11, 2017
  8. k.venkatarao May 25, 2017
  9. k.venkatarao May 25, 2017

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