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Stop intruders from trespassing on your property with this infrared alarm system.
1. Garage Door Sensors like these2. Wireless Doorbell Chime for $63. Photocell4. Various components as shown in the schematic.5. 5 Volt AC Adapter. Yo...
I tried to get inside the garage door sensor to access the circuit but after a bit of prying decided that it would be better to leave it intact and ke...
The circuit is designed so the photocell triggers the 6 volt relay which in turn closes the switch on the transmitter, sending the signal to the recei...
Install the new circuit along with the transmitter circuit inside the hobby box. I drilled 3 small holes. Two on the side for the wiring that goes to ...
Install the sensor transmitter and the receiver wherever you want to use it. They come with around 30 feet of wire. Power it up and when the beam is c...
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