I know this is common knowledge but it doesn´t hurt to remember... your soldering iron / station is usually grounded so it will short the pin to ground while soldering. When I do soldering in an energized circuit i heat the station then unplug it from wall when soldering.
Daniel Em 06/02/2018 07:17, David C. Partridge escreveu:
I really need to change the memory retention battery in my 4808. What I intend is to use a small floating PSU with a blocking diode to supply just under the battery voltage to the memory circuit, then unsolder and replace the battery. However mistakes do happen, so does anyone know of a way to read the contents of the Calibration RAM (and to restore in case of disaster)? Has anyone ever been down the FRAM route? The existing RAM is a TC5564PL (8k x 8) so a FM1608 may well work fine... Thanks Dave Partridge _______________________________________________ volt-nuts mailing list -- volt-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/volt-nuts and follow the instructions there.
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