Found in an Elektor from the 90s, this circuit simulates a rotary switch that provides a BCD output from a 1 pole x 10 common position switch. The circuit can be powered by voltages from 3 to 15 V.
This is an amplifier for low intensity audio and low frequency signals. The transistor can be a...
A 100 nF capacitor and 100 uH inductor form this circuit suggested by General Electric in a 1964...
This circuit is used to run light bulbs around street signs. Incandescent lamps up to 40 W are...