Need Help with circuit and components!!

Thread Starter

1ronman

Joined Jul 7, 2014
14
Hello I am trying to build a circuit that contains a vibration sensor.

I need to have a circuit that when the vibration sensor is disturbed a light turns on and stays on for 5 minuets then switches off if the vibration sensor is still. If the vibration sensor is constantly disturbed then the light will always stay on. Does anyone know of anything or what circuit I need to make?
I'm quite a novice at circuits and I have been racking my brain for ages trying to work this out. Please someone help lol. the circuit will need to be 12V.

Thank
Chris
 

Dodgydave

Joined Jun 22, 2012
8,294
You will need an op amp to amplify the signal, and trigger a 555 timer chip, or cmos timer , plenty of op amps to choose from, try lm358, Tlc272, which vibration sensor are you using, like model number?
 

Thread Starter

1ronman

Joined Jul 7, 2014
14
You will need an op amp to amplify the signal, and trigger a 555 timer chip, or cmos timer , plenty of op amps to choose from, try lm358, Tlc272, which vibration sensor are you using, like model number?
I haven't found any parts as I didn't know that it was possible. Do you think I can just buy it or will I have to make it?
 

Dodgydave

Joined Jun 22, 2012
8,294
You can buy the sensor detector ready-made, and the 555 timer kit on Ebay, if your upto it you can make your own,but will need a circuit and pcb.
 

Alec_t

Joined Sep 17, 2013
10,267
What sort of vibrations are you trying to sense? Fly footsteps? Elephant footsteps? Glass breakage?
 

Colin55

Joined Aug 27, 2015
519
This request is also on another forum, Use an alarm from the $2.00 shop and put the LED in place of the speaker
 
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