RTC for Amiga 1200

[majinga]

Originally Posted by katarakt

What are the two parts R4+R5 (220R) good for ?
...

Probably for current limiting, just in case.
They was there in the original circuit, so i kept them.

[majinga]

Originally Posted by dalek

Take a look at "SMD" battery holders - should be much lower profile - with the battery sitting directly on the PCB. Then just throw some insulation over the top of it. Something like this.

Also maybe even ditch the socket for the chip or use an SMD version.

I ordered some with plastic case. Hopefully the case will act as insulator. But i will see when they arrive.

Yes, there is no room for the socket, but i think the IC will fit if directly soldered.

[kulamario]

Originally Posted by majinga

Well, I'm working on another version. My goal is to allow the RTC shield cover to be closed.
This version use the 22 pin connector, but I wanna keep the spirit of the original version, and share as much as possible components with the other free projects.

At the moment I had some issue with the battery holder, it can cause a short with the shield, so I'll end by replacing it, but I want to keep the CR2032, because, they are cheap, easy to find, and they last longer than a CR1220.

But, tell me with which expansion you have an issue, and we see if can be accommodated.

can u share files for this project please

[majinga]

Originally Posted by kulamario

can u share files for this project please

Once completed yes. I'll release it on GitHub.

[Nightshft]

As I got my ACA1233 RTC I had like 10 different coin cells at home but had to wait for another 5 days to get those CR1220s.

So yes, please stay with the CR2032 Design. Like you said, more capacity, cheap and so much easier to get. Many dont use the shield anymore and a simple warning for users to use insulation between battery and shield should be enough IMHO.

If the RTC module doesnt fit on the ACA1233 you could just use the A1200 mainboard clockport instead (while still using the 1233 of course), or am I wrong?