This circuit makes use of a 741 single source operational amplifier to measure resistors on a linear scale. The circuit may use as an indicator a common multimeter on a low current range.
This circuit is from an 80's documentation, making use of PUTs that are not currently common...
This is 4-input audio mixer using an integrated circuit 741 and two more operational amplifiers....
The purpose of this circuit is to power a small fluorescent lamp from from a 12 V battery. The circuit...