The figure shows how to use the LM3914 bargraph with expanded scale. The circuit has two adjustments determining the extremes of the LED excitation scale.
This circuit was found in a 1967 General Electric manual. It is intended for the control of high...
This circuit was found in old publication from 1958. The circuit uses germanium transistor, common in...
This small audio amplifier can be used with microphones and other audio sources. The circuit can...