This circuit from the 70s uses components from that time. The converter and SAR are components that are difficult to obtain today.
June 2017 - The new TE Connectivity FSJMI series of illuminated tactiles switches is now available in Mouser...
April 2017 - Mouser Electronics is delivering the new Osram DURIS E 2835 LEDs for lighting,...
This traditional complementary circuit produces three different ones, adjusted in the...