Hey all, just following up on Midimuso related stuff - here is some text copy pasted from an email I received from Robert at Midimuso. It answers some of our questions in this thread:
"I put the 500mA as a kind of maximum rating as I knew people would realise that Port D can feed 6 LEDs and the LM324’s can feed another 12 LEDs - and they will still produce the right ouput voltage as they are voltage followers.
Eventually, SOMEONE was going to do that - and people have!
So 18 * 25mA is 450mA
So I put 500mA to be safe.
I had no idea people would Euro / Kosmo rack it.
Obviously, the current draw is much smaller in practice.
The LM317 low drop-out alternative suggested is a good idea and has been used in known designs.
I’ll measure the current used by a CV-12 board with 10k loads on all outputs tomorrow."
Hope this is helpful to someone! I sent him links to this thread so he may pop up at some point.
-Wes