7-segment 4-digit CA display

Forum 2005-2010 (read only) Hardware Interfacing
1

I picked up a 7-segment 4-digit CA display from sparkfun. I'm looking to offload my display to some sort of IC (preferably TWI). Also, I would like to be able to control each of the segments independently (looking for some custom characters). MAX69xx looks promising, although the DS says it's for CC. SAA1064 looks fantastic but it won't run 4 digits multiplexed together (2 2digit segments).

Am I stuck running this directly from the processor (or sub processor even) or just ponying up and getting a new display?

2

If you search the "Exhibition" area, I'm pretty sure you'll find examples from people who've interfaced similar displays, people who've turned Arduinos into I2C slaves, and people who've made "seriously cheap Arduinos" by mounting ATMega chips on protoboards.

By combining the three, you can make your own "I2C 7-segment backpack".