$18 4x4 Air compressor mod 

This is how I modified my 4x4 on board air compressor for $18 so that it can be turned on and off using a remote control. You can do the same thing with a portable 4x4 12v air compressor too. I used a small circuit board available:
ebay.us/oNY4Ml
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The circuit board (above) relies on 433mhz wireless frequency. The kit gives you the circuit board, a remote control and a small plastic case for the circuit board to sit in. The plastic case has screw mounts.
In essence, we remove the small switch on your air compressor. Find the wire behind the switch that turns the compressor on. We run that single wire to the provided circuit board and follow the simple wiring diagram in the video. The final product allows you to switch on and off the air compressor using the remote control provided in the kit.
In comparison, many air compressors have to be turned off using a hard wired switch. This makes it difficult to determine the actual tyre pressure on the in-line gauge since the compressor needs to be off to get a true reading.
This mod makes it heaps easier to get the tyre pressure without going back to the compressor to turn it off.

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