Hi guys.

I am going karting again in a couple of weeks and wanted to take my bullet camera attached to my helmet with a mic and mini MP4 recorder.

I need some way of powering the 12v bullet cam and 12v microphone. There may be a simple solution to it but I cannot see it! I have looked in the maplins catalogue to no avail.

Does anyone know a solution or something I can make that will fit into my pocket and power the cam and mic for an hour or so?

Thanks

http://cgi.ebay.co.uk/GP-1-2V-1100mAh-NiMH-2-3AF-Cells-1-18th-Receiver-Pack_W0QQitemZ220417859394QQcmdZViewItemQQptZUK_ToysGames_RadioControlled_JN?ha sh=item3351ed9f42&_trksid=p3286.c0.m14 8 off these joined together, use a high power soldeing iron to solder direct to the ends of the cells take care not to keep the heat on the + end for very long

here you go - linky

A 10 cell AA or AAA battery holder from maplins possibly or even your local model shop.
Linky

Mike

[Edited on 24-9-2009 by miikae]

lap top battery?

car key fob battery, come in 6 V and 12 V but small capacity

small 12 V lead acid? how big is your pocket?

camera batery e.g. cr-p2, 2 of, 6 V, 1.4 mAh

in the past I have used 8aa battereis connected together end to end to give 12V..

Just use silver foil and duct tape... takes about 15 mins to put together

4th one down: -

http://www.dogcamsport.co.uk/power_for_bullet_cam.htm

Or they will also generally work with a 9v PP3 battery, albeit for not as long as 8xAA.

can you hook up a little dynamo to one of the kart tyres?

12 lemons .. 12 copper nails and a bit of wire ..... i think

http://video.google.com/videoplay?docid=-6226504780579469841#

[Edited on 24/9/09 by woodster]

Thanks guys plenty of ideas there!

An 8AA battery box is 99p at Maplin. A set of alkaline cells will give way over an hours use, probably closer to 10 hours. Use a 10AA box if you want to use NiMh rechargeable cells.

A small 12v sealed lead acid battery is another possibility. A little more expensive but rechargeable of course.