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 Basic digital volt meter/ ammeter		  New Topic  Reply to Topic
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autoassault
New Member

Botswana
1 Posts
Posted - Jun 04 2009 :  03:37:07 AM  Show Profile  Reply with Quote
I would like to build myself a little car alternator testbench. Basically a motor to run the alternator, by belt. A warning lamp,as on the dash, to show if charging or not, a volt meter to show the carging rate, an ammeter to show the charging current and a 12v as my load. What sort of variable load can i have to do load tests and can i put together two basic digital displays for the volt and amps with maybe 1 inc display? Nithing fancy, would like to keep it as basic as possible. Any advice would be appreciated.

Aaron Cake
Administrator

Canada
6718 Posts
Posted - Jun 13 2009 :  10:54:31 AM  Show Profile  Visit Aaron Cake's Homepage  Send Aaron Cake an ICQ Message  Send Aaron Cake a Yahoo! Message  Reply with Quote
Probably the easiest load are several low value high wattage resistors that you switch into the circuit.

Commercial battery testers use large carbon resistors for this. Yours might be as simple as a specific gauge of wire in a bucket of water.
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