We found this time base of 0.1 to 90 seconds in a circuit manual from the 90s. The single-use transistors used are common and the frequencies given by the adjustment by the potentiometer.
This circuit trips when the input signal goes through zero, triggering a direct current load. The...
This circuit is suitable for recovering vinyl media, having been found in an old sound magazine from...
CMOS integrated circuits are sensitive to supply voltages in terms of signal propagation time....