I've been looking for a little LED ohm meter to mount with an ego/510 adapter, and as I'm not crazy about red leds, I found this :-
The most precise, as far as I can tell from the specs is from here, for 12.90$, postage free here:-
Blue LCD Digital Ohmmeter Reading Resistance Testing Equipment 0 200 Ohms Meters | eBay
Another
different specs, not, IMO (but I'm no expert) as precise as the one above, 12.90$ free delivery from here:
3 2 1 LCD Digital Didplay Electric Tester 0 200K
Or, as I just saw, 12.70$ shipping included, again specs different, also IMO, less precise, from here :-
Digital Resistance Meters LCD Ohms Resding Megger Electrical Testing Equipments | eBay
All you need to do is make its' box, with the 510/ego adapter, good if you rewick clearos, and other ego styled resistances; outside soldered to the black cable, inside pin to the red one, and IMO, an ON/OFF switch
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You could buy a metal box from a DIY electronics shop, and just solder the black wire to the box itself, as the outside of the adapter 510/ego is in contact though you might have additional resistance from the metal of the box, unless you slder it together with adapter and box (great if you aren't a spot on solderer. Or make a pretty wooden one, as seen earlier in the thread, or find a plastic on, but rigid enough to support the adapter and atty.
I'd be inclined, to be sure and to leave it plugged in to just put an on/off switch on the box, and pass the wire through it. I use the + wire, but maybe experts use the - wire, especially if it's a metal box, and your - is soldered to the box.
You'll need either a 12V wall adapter, for your mains plug, really the least mA's you can find, as it needs <15mA, or if you play with PC's, use a plug off the PMU, with a prise + & 6 on a back panel, or use simply your imagination. It should work with 3 Ecig batteries in parallel, and a male and female plug. Like that it would be portable (but why you'd want to carry an atty ohm tester around with you escapes me
)
I'm going to choose one sort of female plug for the entry, and use the apprpriate male, for whatever system's easiest.
You could put up a battery box (protected batteries, but not high Ah, 3 x >500Ah in parallel, for ex.) Parallel, for the record, being the 3 + going to the same connecter, and the - all together too. Or however you want to get a low amp 12V supply. An old 12V battery for a portable drill, or something like that could be practical, if you've broken one...AND want the Ohm Meter to be portable
The easiest is if you don't need to carry it around, you simply take a wall adapter 12V, buy the female for the plug on it, put it in the box, wired correctly for the adapter (there's a little diagram on them, with a C and a line that goes into it. The 3C3 is marked + or -, and is the exterior of the plug. You just need to wire the female plug in the box to the same + or - that's on the ohm meter you bought) The plugs are sold in most DIY electronics shops, by diameter.
When I've got past the theory I'll post up some photos of the construction, but it takes a long time to deliver the Chinese ohm meter, from what I see on the sales blurb.
Good luck, hope it works as it should, but it seems fairly simple...
Maybe, thinking about it, it'd also be a good idea to put a fuse in between the 510 atty and the circuit/LED display, if it's not got a protection built in. BUT I'll have to look into that bit, as I'm not sure of the details. Sorry. Any one else hot on fuses?
