Found in a 1968 Novel Electronics Circuit, this circuit compares two light intensities using common LDRs as sensors. Transistors can be modern PNP equivalents.
This basic circuit was found in RCA / GE documentation from the 90s. In it we have the way to...
We found this decoder in a 1966 General Electric publication. It makes use of general purpose...
We found this receiver in old documentation. The transistor is made of germanium and the...