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This is the first RF receiver I made. The motive was prompted by a discount buy of a commercial smoke detectot which ran off 12V in late 2012. My RV came with a 12V smoke detector which had failed, so I wanted to replace it with this one. Wanting to be notified if it went off while parked outside my house, I added a transmitter to it and made this receiver in early 2013. It was with this combination that I worked out the hardware and software to get reliable communications without false alarms. I especially did not want to rush out to check on the RV at night, because I sleep naked! The RV was sold in 2014 with the transmitter removed from the smoke detector. Its transmitting module has been re-used in another project.
This receiver is now used to monitor the gate transmissions. No hardware changes were made. |
This is the inside. The circuit board at right slides into a slot and plugs into the antenna. The receiver module is visible at top.
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This is the circuit Board
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Here are the circuit diagrams:
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Here is the code for announcing the gate operation transmissions with both tunes and colors.
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