This circuit uses a common multimeter on the voltage scale. The calibration of the scale should be done based on transistors with known gains.
Found in a 1980s American publication for amateur radio this circuit uses components from the era. The...
This circuit provides a linear charging for the capacitor. Time interval is adjusted by P1. The...
September 2017 - Texas Instruments DRV5032 Hall Effect sensors, an ultra-low power digital switch...