Found in an Electronic Design from the 80's, this circuit monitors a three-phase line, activating a relay when one of the phases is missing.
In the figure we have the simple way to obtain a digital inverter using a general-purpose...
This circuit can operate with signals from 1.5 to 150 MHz. C1 is 36 pF and C2 is 4n7. The diode...
This is a simple rheostat circuit for motor control that works with voltages from 6 to 12 V. The...