@jofemodo there needs to be more information about how to install the Zynaptik Expander Kit. I believe it comes as 6 parts:
- MCP23017 IC
- ADS1115 analogue input module
- MCP4728 analogue output module
- 40 pin DIL header
- 2 off 10 pin 90 degree SIL headers
I think this would benefit from a 28 pin DIL IC socket to avoid the need for (possibly novice) constructors to solder IC directly - possibly the highest risk of damage to components and difficult to reverse (remove IC) after soldering. (I am going to use 2 off 14 pin DIL sockets because I don’t have a 28 pin. This works fine.)
The two modules presumably are meant to be soldered to the 90 degree headers then soldered to the Zynaptik board. We need to know the orientation of these modules. I can see no documentation or indication on the modules as to which way they should be connected. I also cannot figure out how to insert them without interfering with other components or connectors. Further, I think these too would benefit from SIL sockets soldered to the Zynaptik board allowing simpler construction and replacement in case of fault.
I’ve tried to fit these modules every which way and can’t figure it out! Once there are answers the wiki needs updating.
There also needs some description of how to get the contacts out of the case. Maybe you can’t in which case the description may explain these are for internal use or modification to the case may be required.
[Edit] The modules might fit underneath the Zynaptic board. A little unorthodox but it might work. Just tried and it is a bit too tight fit when mounted upright with 90 degree headers. Maybe with straight headers so they sit flat but I think that would also foul the bottom. Such a configuration may require one on top and one on bottom. I guess you have managed to make this fit some how.