Found in 1967 documentation, this circuit makes use of period transistors and drives a common light bulb. Nothing against it being adapted to use LED.
This Low Side sensor was found in a 2005 Linear Technology documentation. The circuit uses two...
This circuit was found in the Radio Electronics magazine of May 1990. The supply voltage depends on...
This circuit is from the 80's, using an integrated of the time. The circuit serves as a reference,...