This circuit with its light source was found in American documentation two years 70. Or transformer of the type found in small transistor radios of the time. The transistors are general-purpose.
This digital watch with TTL technology has an indication of hours, minutes, and seconds. We found...
We found this circuit in a Popular Electronics from the 80s. The circuit is based on the LM3909, a low...
This ultrasonic transmitter was found in a 1974 documentation. The receiver is the CIR11753 or...