Bear with me, I'm not a EE and I have to google the functions for most ICs.
Came across a color switching a 15 segment common anode RGB LED circuit on instructables using 6 pairs of 74HC595 and ULN2803 drivers. I got it to work on a breadboard, but I want to switch it up and use 3 TPIC6C595 registers to drive 7 segments. I've read that the two are interchangeable, but I can't get the TPIC to sink the LEDs. I found the original project, called RainBoard, http://www.instructables.com/id/RainBoard-RGB-LED-Rainbow-Fader, but it hasn't had any comments in over a year and my kid keeps asking when her light will be done.
I've mapped the pinout differences between the 74HC595 and the TPIC6C595 and made the adjustments on the breadboard, but still no luck.
Any help would be appreciated.
Here's the pinout mapping I came up with:
7C-TPIC
1 - 4
2 - 5
3 - 6
4 - 11
5 - 12
6 - 13
7 - 14
8 - 16
9 - 9
10 - 7
11 - 15
12 - 10
13 - 8
14 - 2
15 - 3
16 - 1
The original code uses ShiftPWM library, but I've seen other TPIC examples using SPI.