Used with infrared remotes at the time, this circuit was found in a 1991 RE Experimenter Handbook. It may not work with the faster remotes control used today.
Found in a 90s Popular Electronics, this circuit provides a current of 3 to 5 A depending on the...
This circuit can be used in decoration or to draw attention, in a “fake” assembly for example. What he...
The transistors of this amplifier for headphones with 8 to 200-ohm impedance can be BC548 or...