8 Mar
2013
8 Mar
'13
3:08 p.m.
On 03/08/2013 04:51 PM, steve shumaker wrote:
found it: GND for the MM5736 18pin DIP is Pin 18.
(check out "build this
electronic stopwatch" at www.schematicsforfree.com)
Thanks - Alexandre just beat you to that (off-list) but then the phone rang
and I didn't get chance to send a "got it now" message to the list! :-)
I just tried quickly and the calc fires up with 'E0' on the display, which
is probably right as the manual seems to imply that 'CE/C' needs pressing
before doing anything. That seems encouraging, anyway (I think the display
IC is just a bunch of LED drivers with no logic element, so the core
calculator IC is at least outputting sensible characters)
Next step is to take the keypad apart - and I may have to bite the bullet
and replace the flexible strip between the keypad and the main PCB; it's
fragile as heck and the copper traces are separating from the plastic backing.
cheers
Jules