I'm trying to design a product that have the following features for mass production, and I'm asking from your experience, how to get the lowest price for the components, quality of the chips in terms of stability due to temperature (it must work in temps over 40°C)
I would like to control a 34-digit 7-segment display. Which way should I go? Just connect lots of switch transistors, and give them one data line each? Or are there easier ways, such as dedicated chips with low price?
- There are 6 groups of 4 digits
- 8 digits for the date
- 2 digits for a counter
I have been away from the Electronics industry since 2008, and I mostly need help to refresh my memory.
I'm keeping in the design that I also need to play mp3 files, read RF remote control, RTC,..etc. So I may run out of the pins because of controlling 34 digits using TDM.