Convert a simple servo tester into a proper throttle trigger style controller. I was testing some motors with a servo controller when a propeller exploded, in a panic I found that the potentiometer knob to be almost impossible to turn off and chaos followed. To avoid future tragedy. I have designed this trigger that works like how you would expect a proper trigger to work.

To build you will need:

• standard servo tester
• 3mm shaft for the trigger axil
• 3mm shaft collars for the trigger axil
• 3mm washers for the trigger for smooth movement
• 3mm self tapping screws to hold the handle together
• some string to attach the spring to the trigger

The design also includes mounting holes at the base so it can be permanently fixed to something.