The circuit described in this article is design to replace AN6877 base LED drivers and it is based on commonly available components. This replacement LED driver is design using 10, MMBT3904/2N3904 transistors and it can easily modify to get necessary number of outputs.
|SMD version of PCB design for 8-dot driver.|
During the prototyping stages we test this driver with minimum of 7 LEDs (AN6877 configuration) and up to 12 LEDs. This LED driver is design to work with 9V to 12V DC power source.
With 7 LEDs and 9V power source, this module can directly replace AN6877 base LED driver modules.
Schematic and PCB design related to this LED driver is available at elect.wikispaces.com.