08-06-2022, 08:42 PM
(07-06-2022, 10:46 PM)Ernest Wrote: That's great Witchy,
You could try increasing to a 10V input, many have found that this is a good compromise.
If you want to stick with the 8.5 V, I suggest changing R11 to a 2k2 Ohm resistor instead and that should give you the extra needed for the Reset circuit. However make sure D2 is working as the importance of D2 as a protection to the input at pin 13 becomes more important if you happen to use a 12V supply at some point in the future.
What components are missing from the other main board you mentioned?
Ernest
Further info, just remembered there are two different versions of the MB1732 Coreboard, the resistor numbering in the reset circuit is different between Mark 1 and Mark 2.
So if you can't find R11 and your R10 is 47K, then the one you should change from 1K5 to 2K2 will be labeled as R9 not R11 Mark 2 board.
Sorry if this created any confusion.
Ernest