This bargraph circuit was found in the January 1986 issue of Radio Electronics magazine. It is based on the well-known LM3914 and has two of them in cascade driving a good number of LEDs.
The power supply shown in the figure provides output voltages in the range of 1.2 to 25 V with...
This circuit keeps an LED on briefly when S1 is pressed. The time depends on C1. The circuit is...
We found this circuit in a 1998 documentation. The circuit can also be used as a minutery...