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Thread ID: 129440	2013-02-23 00:51:00	Convert AA battery device to mains?!	stuffed (1469)	PC World Chat

Post ID	Timestamp	Content	User
1329523	2013-02-23 00:51:00	If you had a battery (2 AAs) electronic device and wanted to run it off 230v - are there any "off the shelf" units to do this?! Thanks	stuffed (1469)
1329524	2013-02-23 01:13:00	A common transformer, mains to 6volt. You may have an issue trying to connect the 6v outlet to your unit?	gradebdan (2186)
1329525	2013-02-23 01:52:00	A common transformer, mains to 3volts DC (1x AA cell=1.5VDC) You may have an issue trying to connect the 3v outlet to your unit? Fixed that for you ;) As a temporary measure make a pair of dummy cells from appropriately sized wooden dowel, use thumbtacks for the contacts, trap the wiring under the thumbtacks. Would be best to use a regulated power pack (wall wart) for accurate voltage versus load. Dick Smith? Jaycar?	feersumendjinn (64)
1329526	2013-02-23 02:09:00	Fixed that for you ;) As a temporary measure make a pair of dummy cells from appropriately sized wooden dowel, use thumbtacks for the contacts, trap the wiring under the thumbtacks. Would be best to use a regulated power pack (wall wart) for accurate voltage versus load. Dick Smith? Jaycar? Thanks - great idea with the wooden dowel. Headed to the workshop to gut a battery but common sense kicked in! So we are looking at 3 volts then? OK help me to on the wiring - just split the DC so 2 + leads and 2 - leads?	stuffed (1469)
1329527	2013-02-23 02:55:00	You'll probably find one end of the battery compartment (if the batteries are side by side and pos and neg terminals are at one end) is internally connected (top to bottom if you see what I mean :)), check with a multimeter. Then attach your wiring to one end of the dowels only, and make sure your polarity is correct when fitting to device (positive is usually the plain/flattish contact and negative will be the raised or spring contact) at the opposite end from the internally connected end :). If the batteries are fitted like this +XXXXX-+XXXXX-, just fit the dowels with pos and neg at each (farthest) end (+DOWEL-+DOWEL-) It could be that the batteries may be connected in parallel (pos/pos, neg/neg) thus supplying 1.5v and twice the current draw, in the device, but this is VERY unlikely.	feersumendjinn (64)
1329528	2013-02-23 03:14:00	just split the DC so 2 + leads and 2 - leads? No, dont do that, you would effectively end up with two 3 volt (dummy) cells. :horrified:crying	feersumendjinn (64)
1329529	2013-02-23 07:30:00	Must have had a brain storm. Of course 2xAA cells in series add up to 3 volts (nominal). Fully charged under no load they can read up to 1.65v each.	gradebdan (2186)
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