This circuit was found in the July 1988 issue of Radio Electronics magazine. It makes use of an operational transconductance amplifier (OTA) still in use today.
This simple metronome, from 1985 documentation uses only transistors and has two settings. For...
This circuit is from a1970 documentation. R1 may have 10k and P1 47k. The transistors can be BC558...
This circuit consists of a variation of the previous one being activated when the switch is...