Need an LCD voltage display

computer

Platinum Member
Nov 5, 2000
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Can anyone please tell me where I might be able to find something like this?

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I need an backlit LCD, fluorescent, LED, etc., digital voltage meter/display. Just the display, but it of course needs to measure voltage and must be accurate to 3 decimal places (3.123v) for example. Voltage monitored would be around 3v, but it would have to measure from at least 2.5v to 3.5v, a wider range is OK. This is for monitoring the Vdimm memory voltage for RAM on a motherboard. I would mount the meter in a blank 5.25" knock out plate for example (what you remove from a computer case to install an optical drive) and I'd cut it out to fit the dimensions of the meter. It would have to run off of 12vdc or 5vdc which would be powered from the PC's power supply.
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Thanks.
 

computer

Platinum Member
Nov 5, 2000
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Radio Shack didn't have anything accurate, they only had analog, at least according to their website. I'll check BGmicro, thanks.
 

Zepper

Elite Member
May 1, 2001
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RS used to have digital panel meters. See additions to my earlier message.
.bh.
 

computer

Platinum Member
Nov 5, 2000
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Ok I'll check those too, thanks again.

I know RS used to have things like that, I can't believe they have nothing like it now at their website! Not even any kind of LCD displays!
 

Zepper

Elite Member
May 1, 2001
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Or if cost is no object, you can go to digikey.com . And don't forget trying a google/froogle search.
.bh.
 

computer

Platinum Member
Nov 5, 2000
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No, cost is an object. ;) I tried Google first and spent too much time there so I thought I would ask. In case anyone else is wondering, I found http://web-tronics.com/panelmeters.html (last 4 sections) that seems like they may have what will work, but I had to email them to ask which would fit my app and no reply yet. I also sent out emails to several other places. A friend of mine has an PM-35A from here http://www.texmate.com/appspec/ he said he'd send me for nothing. So, I need to determine if that will work. It has a resistor that can be changed to modify it to the 20v range. Will only be 3.xx volt display, not 3 decimal places, but for free that sounds fine to me. I'm about to try alltronics now, Jameco is probably too high (I order semi's from them from time to time) but I'll see what they have anyway. I order from BGmicro a lot and forgot all about them. They have one, (the MET1003) but the guy said it is powered from a 9v battery. That may be the best bet for others needing one since it is so cheap and the power source can be modified. It was less than 15 bucks, maybe 8. Can't recall since all their meters similar to this were below $15.

Thanks again. :)
 

Zepper

Elite Member
May 1, 2001
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Jameco has a 4.5 DPM, costs around $28. Not too bad considering digikey wants about $60. for one.
.bh.
 

computer

Platinum Member
Nov 5, 2000
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Yeah I thought about that and considered that, but that would take a bit of hacking and time, which I don't really have (much time). ;) If one was going to cost me a lot, I certainly would have used one of my cheap LCD digimeters I have laying around. I think I'm getting that PM-35A from my friend, but he's in Canada so I need to check the shipping rate first. I'll post how well it works in case anyone else wants to do this mod. BTW, this is for my P4C800-E Deluxe that I did the Vdimm mod on and I just wanted a way to monitor the voltage.