Need Help with a LED sign

i need to make a Sign for my work, that turns on when a buzzer rings, what im looking to do it have a vibation sensor, attached to the buzzer (i cant splice into the buzzer) a micro controller to have the sign turn on for 30 seconds, to turn on a string of leds, what would i need to do this, i know a bit about electronics but im not sure what i would need to make this work, any help would be really appreciated

vibration sensor and or a sound sensor to turn on a string of leds for a set amount of time

by RyanKorponay
December 31, 2018
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1 Answer

Answer by mikerogerswsm

You could use a Velleman vibration sensor:

triggering a 555 timer in monostable mode:

and driving your display:

The leds drop a couple of volts each and need a series resistor to limit the current to 20mA in each device. You may find you need to put them in parallel, with a really beefy driver transistor or FET.

+1 vote
by mikerogerswsm
December 31, 2018
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