We found this circuit in a 1965 magazine. The circuit can be assembled with current equivalent transistors and the precision in generating the frequencies depends on the tolerance of the capacitors.
This circuit has been found in an old documentation and therefore uses a lamp as an indicator. In a...
This monostable circuit uses one of the two flip-flops available on the CMOS 4098 integrated...
This project came out in an article of mine (Newton C. Braga) in the Popular Electronics magazine of...