This reducer was found in documentation from the 1980s, using transistors of the time. The higher current transistor must have an excellent heat sink.
We found this simple music box circuit that can also be used in a musical bell in a 1991...
This circuit was found in the September 1984 issue of Radio Electronics magazine. The frequency is given...
Found in a 90s Maxim documentation, this circuit disconnects the battery in case of overload. The...