The S-meter is a signal strength meter used in communication receivers. This circuit was found in a 303 Circuits from the 90s, European publication.
This CMOS circuit divides the frequency of a rectangular signal up to 2 MHz by 6. The supply...
PIC16F19197 Microcontroller Family Combines Battery-Friendly LCD Drive with Core Independent...
This source draws a fixed constant current of 1 mA using a Norton operational amplifier. Other...