His solution to the problem was to get rid of the toggle switch used to turn it on and replace it will a home-made momentary push button switch.

In this case, [Tod] wanted to use a momentary tactile switch to turn something on and off. Instead of going with a microcontroller he built the circuit around a 555 timer.

This push-button fan switch design includes a timed automatic shut off, connections to the mains, and other minor changes from previous Design Ideas.