Nokia 3310 / 5110 display board

I'm seriously considering to fix the minor problems, make another batch and sell them. Here are some thoughts and questions.

• it's simple to understand
• easy to integrate into projects
• it's different enough from the original LCD modules
• parts are affordable, which keeps BOM small

Design considerations

• should I add a controller for the RGB led?
  • should I connect via SPI or I2C?
    • I2C: more pins on the header, Attiny possible
    • SPI: too many pins for attiny, LED pin reusable as CS
  • or even use WS2812b protocol
    • LED pin reusable as DIN
    • requires timey-wimey stuff
    • get attiny or original controller chip
  • leave it as is, use 2 extra pins, let the customer worry
• design pinout like sparkfun, adafruit or cheap eBay boards?
  • idea here is to make it easy to swap
  • keep it 5V?

Pricing

could be around 10 Euros and still have a good margin.

Notes:

• definitely order 0.8mm boards (I failed because it was after midnight... )
• pins for display can be shortened by shield -> edit footprint!
• 5V stuff is confusing! I only considered it for getting more "bang" for the buck
• next version should have Attiny13 for I2C RGB control
• maybe add an ESP12 foot print
• play with MQTT (red alert / temperature stuff)
• also RGB pinout is not correct!
• resistors for colors are not in the same order and values must be corrected
• ESP12 analogWrite has 10bit resolution!

https://catmacey.wordpress.com/2013/08/08/breakout-board-for-nokia-1202-lcd/

It's a Nokia 1202 display, having a whopping pixel resolution of: 96x68

where the Nokia 3310 has merely 84x48

The first display from eBay came the other day and these are the winning pictures that got me a second one send to:

No boards here yet, so it doesn't hurt. Well it does hurt seeing those monstrous scratches. Two other displays with pcbs arrived as well, no scratches and with a protecting foil.