Found in a 90s Popular Electronics, this transistorized circuit generates pulses from 2 Hz to 50 kHz in three selectable ranges. The circuit has both AC and DC outputs.
The purpose of this circuit is to obtain a voltage of 15 V with 1.5 A from a 48 V input. The...
In the figure we give a suggestion of a high-power stage to excite a speaker with the 2N3055. The...
This alarm circuit with NC sensors in series was taken from an article in Radio Electronics...