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 of great use today, when solar energy is becoming increasingly important. The...
In figure we have an interesting circuit in which an LED is used as a photoelectric sensor. When...
This circuit is from an old English documentation. It is intended for coupling a microphone to the...