Found in American documentation from the 1980s, this circuit makes use of components of the time, which are uncommon today. The circuit detects the approach using a sensor formed by metal plates.
Found in a 90s Silicon Chip documentation, this circuit provides a current of 3 A and the voltages...
We found this circuit in a Japanese publication in 1967. The circuit consists of a 15 W audio...
This is a bridge for the measurement of low value resistances and high values too. The circuit...