activate alarm using microcontroller
July 24, 2009
I have 2 circuits:
1. flame detection
2. alarm circuit
Flame detection circuit connected to the pololu robot controller.(atmel AtMega 328p) I am able to get the values from the ir sensor of flame detection circuit. I need to active an alarm when the value is, lets say = 100. I'm a little confused how can I do that using microcontroller... it dosn't output 5v, so I guess I need to use something that will work as a switch when microcontroller drives HIGH or LOW it would turn on/off the alarm circuit.