This circuit activates a buzzer when the voltage applied to the input falls below a preset value in R1. The circuit is from an 80's American documentation.
This single-cell Li-Ion battery charger was found in a 2005 Linear Technology manual. The circuit...
This circuit is from old documentation and can be assembled with 2N2646 for the unijunction and...
A safe way to obtain a sinusoidal signal of excellent quality and low frequency without the need...