These optical relays, which can act as a shield, were found in an American documentation from the 1980s. The circuit has a LDR sensor. It can be adapted for other types of sensors.
This circuit can be used in PLL, frequency synthesizer in FM and VHF receivers, reducing a...
Found in an American circuit manual from the 1970s, this circuit can use any general-purpose transistor....
This power supply was obtained from an Electronic Design from the 90's. The circuit applies to...