The motor required mounting on a base to effectively capture the airflow from the fan. I designed a two-piece base in Retina Engrave 3 and laser-cut both components from 1/4″ wood and acrylic.

For the circuit, a Multisim model of the half wave rectifier circuit with a smoothing capacitor was created.

The circuit was subsequently implemented on a breadboard. For the low and high-speed indicators, a potentiometer was employed to set threshold voltages, with comparators used to activate the LEDs when these thresholds were exceeded. For the gradual speed indicator, a transistor was utilized to control the LED based on the rectified generator voltage.