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 dimmer for high-powered incandescent lamps was found in a 1967 General Electric manual. The...
This circuit uses three inverters to generate a rectangular signal whose frequency depends on R1...
Found in Linear Technology documentation, this circuit drains only 70 uA of the monitored circuit....