Sinclair ZX80 / ZX81 / Z88 Forums

Hello Matthew,
nice project. Do you have a spare PCB for me? It would be interesting to compare your board with our recent construction (rune and me) which can be found in
https://forum.tlienhard.com/phpBB3/view ... 188#p45188
The address decoding is much poorer than yours, but the filtering of the sound signal is due to the datasheet of the speech chip. You have choosen a much simpler circuit in contrast to that.
Heinz

zx-heinz wrote: ↑Sat Aug 29, 2020 11:07 am Hello Matthew,
nice project. Do you have a spare PCB for me?..
Heinz

I have a few extra of each, DM me

Cheers,
Matthew

The fruits of my labor

https://youtu.be/8lsREF6Yufs

I finished assembly of the LM386 version
Works great. It's nice to have the reset switch for the SP0256-AL2.
And I can see the volume control being useful in some situations.

The Gerber files for both can be found here
https://github.com/mcarlson-sb/talk-again