Found in a 1968 Novel Electronics Circuit, this circuit compares two light intensities using common LDRs as sensors. Transistors can be modern PNP equivalents.
The frequency of this oscillator depends on the crystal used and the transistors. The circuit was...
This circuit is for collectors. It is the circuit of one of the most popular transistor radios of the...
Another of the many tachometer circuits we have on our site. This one is from the September 1976...