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 oscillator in the figure has its frequency determined by the crystal. The indicated value is...
This circuit activates an incandescent lamp (or LEDs) when the light stops hitting the sensor, which...
This didactic circuit was found in a 2001 documentation. It automatically counts in an increasing and...