This simple circuit for motors that depends on the MOSFET used was found in the January 1998 Electronics Now magazine. The motor voltage does not need to be the same as the oscillator.
Found in a 1960s Philips documentation, this circuit accepts inputs from 16 to 20 V. The...
This 4-digit counter uses CMOS integrated circuits and is powered by voltages from 6 to 12 V. The...
The voltages in an adjusted range in the trimpots are indicated by 3 LEDs. The LEDs indicate when...