Updated: 18-Dez-03

The DDDAC1543 Support Site
Trying to be of some on-line help......

Using Common Mode Cathode DUO-LED with the battery checker

The battery checker, which is on the DDDAC1543 PCB was designed for use with 2 single LEDs, which of course is causing no problems. BUT, if you want to use a so called DUO-LED with 3 connections, you need one with common Anode. No big deal ?? Though..... It turned out that the most common DUO-LEDs have a common cathode.... So I did the following small modification:

The red components are external and this can we simply "hard-wired" around the connection pins and the LED pins...... For the Battery-Checker KIT, these are the final values and components:





Happy Listening and Building !!!!

Doede Douma

IMPORTANT: The information provided on this page is intended as guide for DIY activities and therefore free to copy and or publish. If any one wishes to use any of the information from my WEB site, please make sure to refer and footnote to my URL Link as source! Doede Douma