When the voltage in the circuit exceeds the value set in the trimpot, the LED goes off and, if a low current buzzer is used, it rings. The circuit is from American documentation from 1999.
This simple circuit is designed to charger AA or AAA Nicad batteries. Current can be changed...
The circuit shown in the figure is suggested by Texas Instruments in its Linear Circuits...
A touch of a sensor triggers this minute for a time determined by R4 and C3. Times can be between a...