[time-nuts] fluke.l monitor for Thunderbolt . . . the saga continues

[Didier Juges]

There is no pin-compatible replacement processor, at least not in a
compatible package.
I could use a C8051F300 which is available in a 14 pin SO package, but I
have not had time to switch the software over to that chip. It would not be
too hard to wire the SO-14 package to an existing board designed for the DIP
packaged C8051F330. The chip only costs a few $.

If anyone wants to try, the software (source code and tools) is open source.
All information is on my wiki page for the GPS Monitor.

Follow that link: http://www.ko4bb.com/Timing/GPSMonitor/

Didier KO4BB

On Wed, Jul 6, 2011 at 3:39 PM, Arthur Dent <golgarfrincham at yahoo.com>wrote:

> I seem to remember someone on this list posting that the original processor
> was no longer available so this required a board change to accommodate a
> new processor. I think the new processor also requires 3.3vdc but if you
> Google the chip's part number I'm sure you can find all the specs and this
> will answer your questions.
>
> If the new chip requires 3.3 vdc and there aren't 3 diodes on the board to
> drop
> the 5 vdc down, this will be a problem. The old board had 3 zero ohm
> resistors
> in place of the diodes and this is why some of the boards failed. As I had
> posted previously, I used a red LED as a 1.7-1.8 volt zener to drop the 5
> volts
> down to the proper value.  The LED went in place of the 3 regular diodes.
>
>    -Arthur
> _______________________________________________
> time-nuts mailing list -- time-nuts at febo.com
> To unsubscribe, go to
> https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts
> and follow the instructions there.
>