Date   : Thu, 08 Apr 2010 23:02:42 +0100
From   : andrew.hancock@... (Andrew Hancock)
Subject: Testing homemade Master battery pack

Tom

If you have included the resistor and diode as per instructions it shouldn't
charge the batteries!

If you haven't included the resistor and diode, you've made an original
Acorn exploding pack!

You'll find out after switch off if it doesn't work, as the battery backed
ram will lose its contents very quickly, and default, and you'll have to
configure everything again, as per article.

Andrew

-----Original Message-----
From:
bbc-micro-bounces+andrew.hancock=cyrus-consultants.co.uk@...
[mailto:bbc-micro-bounces+andrew.hancock=cyrus-consultants.co.uk@...
9.co.uk] On Behalf Of Tom Seddon
Sent: 08 April 2010 21:52
To: bbc-micro@...
Subject: [BBC-Micro] Testing homemade Master battery pack

Hi

Thanks to JGH's recent giveaway I'm now the proud owner of a Master 128.

It needed a replacement battery pack, so following some instructions I
found
(http://lionels.orpheusweb.co.uk/CompNyb/TechStuff/8-Bit/Master128/128BatCon
fig.html)
I've made myself a new one. I don't really know what I'm doing though, I
just somehow remembered how to solder things together -- does anybody have
any hints on what I should do to test it?

As far as keeping the CMOS contents around, it appears to work; I'm just
worried about the recharging issue. I was just going to leave the thing on
overnight and check tomorrow that the batteries haven't exploded, or
warmed up any... would this be enough of a test?

Thanks,

--Tom



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