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 obtained in a 1970 EEE and applies to almost any operational amplifier. The...
This circuit was found on an 80's Ham Radio. The transistor admits equivalent. The circuit can...
This circuit shows how to implement a TTL compatible oscillator using a transistor. The circuit is...