Found in a 1968 Novel Electronics Circuit, this circuit compares two light intensities using common LDRs as sensors. Transistors can be modern PNP equivalents.
You can use this simple audio amplifier on your bench, on an intercom or as a power stage for a...
Found in a 1975 radio amateur publication, this simple oscillator is for code practice. The PNP...
The operating voltage of this circuit is 18 V, and the source current is 3.5 A. The circuit is...