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V1.2 Boards Ordered

A project log for SAO Speak and Spell

First PCB board design and SAO in one project motivated by Supercon 2024

jeremygeppertjeremy.geppert 10/13/2024 at 01:042 Comments

After some more modifications V1.2 has been released to production!

V1.2 Changes:

1. The window for the OLED has been narrowed a bit to allow for variation in the OLED displays by batch/manufacturer. One the second batch of OLEDs I ended up having a space on the left that didn't look right.

2. The addition of a test point pad that traces to GPIO2. This will be for blue wiring to the audio amp stand along circuit board I am going to stick on the back of the board to add sound. I am running out of time and this made the most sense for my skill level. More on those details further down the update.

3. I moved the polarity jumpers down to the bottom to allow plenty of room for the speaker and amp circuit.

The Speak and Spell SAO is going to be capable of speaking and spelling!  :)

After some great input and ideas on the colors, I decided to go with white silkscreen on red mask. I will spray paint the black bar. This will allow me to paint the inside exposed board edge of the OLED window.

I'll also plan on painting over the OLED pins after soldering in place.

This is the little mono amp circuit I plan to integrate onto a few of the boards to play with.

And this is the speaker I am using. Part number and link to digikey will be in the components list on this project. My initial testing of placing the speaker on the backside of the board increased the perceived volume. I'll probably just hot glue it in place so it stays tight to the board and sounds the best.

Discussions

Aaron wrote 10/18/2024 at 18:07 point

> The Speak and Spell SAO is going to be capable of speaking and spelling! 

This is super exciting! I'm really looking forward to seeing this!

  Are you sure? yes | no

jeremy.geppert wrote 10/19/2024 at 13:59 point

I'm hoping to have a demo of it running through the full word list from the original Speak and Spell soon.

  Are you sure? yes | no