I just love these cheap LED voltmeters and ammeters you can get on eBay. Here I wire a bunch of ammeters together to see how they perform at various different currents.
By Julian
Youtuber, shed dweller, solar charge controller aficionado
I woudn't say you display in the power supply is accurate either, you have to use a precision reference instrument to establish that…. So for layman work they are all accurate!…
ebay Sucks! or some of the sellers do. I just bought a Digital, 300 amp ammeter with a separate shunt , similar to the ones on your video but not the exactly same and the seller can't seem to send me the correct wiring diagram, with the same colored wires and he/she hasn't once mentioned a separate power supply, it's like they don't really know what they are selling. Previously bought a 300A (model name) digital meter (all in one) with two large + & – wires on each end and it started to melt at around 200 amps, although it did read it (197 Amps) but it couldn't handle it for a more than a minute or so. Some ebay sellers suck Bad!!! They must be Dumpster diving .
I would love to know how you wireded the setup?
Hi Julian. You are over paying for all the electronics you buy on ebay all of them are dropshippers. Why not just buy from aliexpress directly for much better prices?
I picture worth a 1000 words, Julian I watch you video ALL the time, many multiple. I wiring diagram of all this would REALLY help us understand your testing and how we could do the same to learn more. Thanks for all the efforts!
more digits (after the decimal) does not automatically mean more accuracy
Bought one of the dual Volts and Amps with a separate shunt to read Amps on a car amplifier set up in home, works with the shunt but it is meant to able to read under 10A without it though it just doesn't work without the shunt.
Worthless without knowing what the actual value is, all you did was rely on another digital display meter slapped onto the power supply.
I want to separate the power source and the actual input pin so I can still run the voltmeter but measure down to 0 volts on the input. The way it is now the two inputs are tied together and when the power gets below 4 or 5 volts the display quits. Where can I separate these 2 inputs so I can measure down to 0 volts but still have the measuring part (LED's and measuring part) running from a separate 9 volt source?
thanks for the info !! so which one should i buy???
Hello, how would you go about wiring the ebay red & blue panel meter so that with a 24 volt power source to be able to show the voltage from the 24 volt power source But also show the load from the same 24 volt battery?
The dual V/A 3 digit model come with a FIXED single decimal digit on most of them. I have been tearing my hair out trying to find the much better floating 1 / 2 decimal V version, like the one you have. Please, please, what is the exact URL for the one you got???
Jullian wire ! thick & thin, as you know there's a great range of wire gauges out there, no one every seems to give a ball park gauge when there demonstrating there gadgets, so what gauge are you using for this lot, 1 to 36 AWG or 0.19mm to 8.23mm SWG & thats just a few, not every one knows the voltage a wire can carry with out blow their gadget up or frying it. but as alway your informative Tutorials gems.