This circuit was found in the component's own manual, which is not very common nowadays. Note that the circuit requires the use of a symmetrical power supply.
This circuit is from a technical publication on voltage regulators from 1977. The transistor can...
This analog frequency meter for low frequencies was found in Radio Electronics magazine from July...
This circuit is from the 1983 Intersil Databook. The circuit operates on a 9 V battery and has a...