simple LDR, relay, and doorbell help

Discussion in 'The Projects Forum' started by Chris15, Jun 23, 2009.

  1. Chris15

    Thread Starter Active Member

    Apr 15, 2009
    hi guys, now i have a light activared switch i made with a transistor and a pot, 1 resoistor. I also have a wireless doorbell transmitter, i have soldered 2 wires on the switch contacts, when these 2 wirs touch the doorbell will sound like normal. I want it to be triggered by the light switch. Relay, i connected the 2 wires from the light activated swotch's output to the coil on the relay, so now when i cover or light the LDR the relay makes a clicking sound, its going across, i thought if th doorbell wires i modded touch were connected to the COM leg, and the other on the NO, normally open. If you cant see whar i want to happen it s this with circuitry i have just sad. When the light on the LDR is broken for few seconls to indicate a car or a person walking past the beam, i want the relay to trigger the doorbell, then ack to th start. thanks, chris. Sorry about all the spelling i wrote this in the car on my phone. Thanks