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.
The slope of an object causes the sensor, a mercury switch to be triggered. The circuit activates...
This oscillator can run in frequencies up 10 MHz depending on the Power supply voltage. The 1 µF...
Although not using transformers, this amplifier may have difficulty mounting if the original...