This commercial transistor radio was manufactured by RCA in the 1960s. The circuit has only 4 transistors and is powered by a voltage of 9 V with an audio power of 20mW.
Found in a 90s Linear Technology document, this circuit uses components from that time. The...
One pulse in the output is produce at each 5 pulses applied to the input. The circuit uses CMOS...
This control for 12 V drills was found in a 90s Elektor. The components are current, and Q1 can be...