Remote Controlled Trap Release Solenoid PUBLIC

A simple solenoid driver that is controlled by an off-the-shelf wireless camera remote. The circuit provides power to the remote and the solenoid (or a relay if desired) from a single 12V battery.

I needed to remotely, from about 60 metres, operate a solenoid and didn't want to reinvent the wheel for what is largely an experimental project. A suitable solenoid is readily available and needs 12V to operate it and it draws 500mA when energised. An easy solution for the wireless remote is a off-the-shelf camera remote as these have an open collector output to operate the camera shutter. With these two ends of the system decided all that is necessary is to link them together.

The circuit I came up with uses Q1 as a simple inverter and Q2 to switch the solenoid. A three volt regulator allows the 12V battery to be used to power the solenoid, and the remote receiver which normally has two AAA batteries inside it.

I haven't built it and tested it yet but Circuit Lab simulation looks ok.