Found in a 90s Popular Electronics, this circuit triggers a load from the audio signal applied to its input. The controlled load depends on the MOSFET.
The load current can be adjusted up to about 1 A. The transistor can be TIP32 or TIP42. The...
With this step the motor is energized when the TTL or CMOS input is high. Motors up to 1 amp and...
The diodes on this power supply are 2.5 V x 1000 V. The circuit provides a very high voltage for...