This simple circuit found in a 1968 EEE was intended for data transmission over the telephone line. The components are from that time, some are uncommon today.
The purpose of this circuit is to monitor the output voltage of a power supply. The under and over...
Old multimeters used a 22.5 V battery for high resistance measurements. If you have one, you...
In the figure we show a monostable that uses two of the four ports available on 4001. The duration of...