This automatic brightness control that uses an LDR as a sensor, was found in American documentation from the 1980s. Resistors in series with LEDs depend on the desired current.
This interesting op-amp signal generator circuit was found in a 1977 documentation. The circuit has...
May 2017 - In stock at Mouser Electronics DGD Dgate drivers from Diodes Incorptrated ara...
This circuit can be used as a shield for touch control. The circuit can use any common FET like...