This analog ammeter circuit was found in documentation from the 1980s. The components admit equivalents and the scales are determined by the values of the components in the range selection.
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...