This high impedance amplifier is from 1985 documentation by General Electronic. The amplifier with FET at the entrance is from the period and the source is 9 V.
This 100-second timer was found in a 2000 Poptronics. The magazine no longer exists, but the...
This circuit uses a photocell as sensor and a sensitive relay according the power supply voltage....
USB58xx and USB59xx Devices Integrate a 2:1 Multiplexer to Support Reversible Connection of USB...