This basic TTL watch and minute clock circuit was found in European documentation from the 1970s. The power supply is not included and is given in CB19635E. The circuit uses common anode displays.
I got this circuit from an English magazine from 1977. It can still be easily assembled, as the...
This simple lie detector was found in Popular Electronics. Transistors are commonly used. The...
Found in a 1980 documentation, this circuit drives a transducer (X1) when the car battery has its...