BigJohnny Posted June 30, 2009 Report Share Posted June 30, 2009 I just got the amp and voltage meter I ordered from Asia Engineer on eBay, and I thought wiring it up would be simple but the instructions prove to be a little more complicated. Apparently each meter must have it's own separate power supply, and they can not measure from the same source. first of all, does anyone know any reason why they would not be able to use the same power supply for their working power. These are not car specific, so there may be a reason I'm overlooking. I can't see why it would cause problems, and any power in a car is from a single source, the battery, so I have no choice but to use the same power supply to power them. The meters are 5v, and I have a 7805 regulator that steps the cars voltage (it's been tested at 15v) down to a steady 4.95 volts, this circuit includes caps to smooth spikes. what would be the problem in powering both meters from this circuit? Secondly, the shunt that's included for the amp meter, will it cause any problems with electrical flow or current, or will it interfere in anyway? I would like to hook it up from my alt to measure the total load put on the alt. Should I measure the battery instead? Ideally I would like to see what kind of current is being drawn from my audio system when it spikes, and when it's running, but I would also like to know the overall load being put on my system. If I measure the amperage from the battery then according to the wiring diagram/instructions below I won't be able to measure the voltage from there. So what do I do here? How do I wire these up? Quote Link to comment Share on other sites More sharing options...
BigJohnny Posted July 2, 2009 Author Report Share Posted July 2, 2009 according to the seller, connecting these to the same power supply will "burn dead the unit" there are isolators available. Quote Link to comment Share on other sites More sharing options...
BigJohnny Posted July 3, 2009 Author Report Share Posted July 3, 2009 (edited) so, about the shunt, will it cause problems with anything? where should it be hooked up I.E what should I be measuring. Edited July 3, 2009 by BigJohnny Quote Link to comment Share on other sites More sharing options...
BigJohnny Posted July 4, 2009 Author Report Share Posted July 4, 2009 Pics.... voltmeter on the left, amp meter and shunt on the right. Quote Link to comment Share on other sites More sharing options...
BigJohnny Posted July 7, 2009 Author Report Share Posted July 7, 2009 ok, I know where the shunt goes, but how the hell do I mount that thing? it's totally exposed, and I can't have an open connection like that. It certainly can't be touching any metal. I need a housing of some form. Quote Link to comment Share on other sites More sharing options...
BigJohnny Posted July 10, 2009 Author Report Share Posted July 10, 2009 how do the stinger meters work? Do they not use a shunt? Quote Link to comment Share on other sites More sharing options...
lolitskasey Posted July 10, 2009 Report Share Posted July 10, 2009 how do the stinger meters work? Do they not use a shunt? Stinger meters only have 3 wires Power Ground and Remote wire. Quote Link to comment Share on other sites More sharing options...
BigJohnny Posted July 10, 2009 Author Report Share Posted July 10, 2009 (edited) wait.... I'm stupid, the stingers are volt meters...... this is an amp meter. Edited July 10, 2009 by BigJohnny Quote Link to comment Share on other sites More sharing options...
lolitskasey Posted July 10, 2009 Report Share Posted July 10, 2009 Yes. Quote Link to comment Share on other sites More sharing options...
BigJohnny Posted July 10, 2009 Author Report Share Posted July 10, 2009 ok, now that that's sorted....lol Any ideas about how to mount this shunt in my engine bay? it will be going close to the alt. Quote Link to comment Share on other sites More sharing options...
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