The figure shows how to use the LM3914 Bargraph with an external reference voltage source. The reference cannot be greater than the supply voltage.
The circuit presented is a simple MW tuner that can be plugged into the input of any audio...
We find this circuit in a 1970s documentation on operational amplifiers. The setup is true for...
This amplifier was found in an 80s component manual. The circuit can be used for media recovery....