Found in documentation from the 1980s, this circuit can have several adaptations to use modern transistors and LEDs instead of the lamp. The power supply voltage can also be changed.
The short-wired circuit is suggested by National Semiconductor in documentation on the LM3909. The power...
This ultra-low noise amplifier and simple power supply was found in Analog Devices documentation from the...
This touch switch is from a 1978 publication. The circuit should not be powered by a...