Reverse polarity protection 2 (CB22140E)

This circuit has an improvement over the previous one as it also has an LED indicator for correct polarity.

Mouser Electronics and Grant Imahara Launch Groundbreaking Contest to 3D-Print Design Aboard International Space Station
July 25, 2016 –Mouser Electronics Inc. is teaming up with celebrity engineer Grant Imahara for the...
Touch Keyer (CB26322E)
This CW circuit was found in a Radio Amateur Today from the 890s. The CMOS circuit must be powered by...
Adjustable reference (CB21539E)
This circuit was obtained from an old American publication. The uA702 is a differential amplifier and...