12V Monitor LCD display

I'm looking for a 12V display to monitor 12V as it changes. And display it in .1 increments. Small as possible. Can anyone point me to something cheap?

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Goodhart8 years ago
LONG time ago, I made one with 2 v increments, using standard rectangular LEDS as an indicator (6 of them), and I believe the project involved using 2 Decade counters, but I don't remember much else about it. I will have to look to see what I can find...
fasterthanyours (author)  Goodhart8 years ago
After some searching I found out that what I need is an LCD, not an LED display. Sounds like what I'm looking for, but I really need to see the voltage in the 1/10th or 1/100th increments. Basically what I'm wanting is to setup a reiostat(sp) that regulates the voltage going into the LCD, the LCD displays the voltage going to my monitor device, the device is making changes to other things based on the voltage. I need the voltage to be visual so I can demonstrate that to people. Thanks.
is it possible to take a small lcd screen and light / make dark single pixels in it (as in X Y) ? maybe you can use such screen + 7 bit or better ADC (8 bit are common) and some demuxes
fasterthanyours (author)  110100101108 years ago
Thanks...I'm not electrical engineer.
I was kind of hoping some one had a lead on what I'm looking for.

This seems to be the most promising and I have contacted them.

Not sure if their display does greater than single digit voltages.
what i think of is like a download bar that goes between 0 - 100 without actual numbers displayed
fasterthanyours (author)  110100101108 years ago
Nah i need the numbers because I need to indicate to my customers that said voltage coming from this accessory is 11.8 so my equipment sends out 12.2 to another accessory which makes it perform a certain operation based on that 12.2 voltage.
then use the circuit from a multimeter
fasterthanyours (author)  110100101108 years ago
Man, I don't know how I missed that thanks! I've got 6 of those in the garage, I'll just use those! Seriously though. I'm building what amounts to a diagram of a 12 volt system with many accessories and I need to display voltages for many of these items all at once. So using a multimeter or multiple is neither functional nor professional looking.
you can disassemble the circuit and screen from the box you can build a circuit that switches the display between the sources
fasterthanyours (author)  110100101108 years ago
Hmm..Maybe..I'm still hoping there's something out there already made to do it. Stinger Electronics makes one, but it's $20 or $30, however they look really good. I know I can find those pocket multimeters for cheap and do what you suggested. However, I'm still open to other suggestions.
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