Digital Volt display

[YellowMP5]

allright, send me a reminder on wednesday. i might forget

 

[YellowMP5]

mulla sent,
send stuff

 

[Intruder]

Money received.
DVM will be in the mail tomorrow.

 

[YellowMP5]

it's been two weeks and i still have not received it? what's up?
was hoping to have it on the car by thursday

 

[Intruder]

I apologize for the delay, but while soldering your voltmeter I managed to melt one of the LED displays (which were the last two), and I had to order replacements... which arrived yesterday. Needless to say, I am very sorry, but stuff like that happens when I'm soldering at 2am in the morning. I apologize once again. I will ship your voltmeter by Express Mail first thing in the morning, and you should have it overnight.

 

[Rism]

I bought one off him, he is legit and makes a great product. Here is a thread of mine with some pics of it installed
http://www.msprotege.com/vbb225/showthread.php?t=80296
I mounted it in back so i could see it during the day, its hard to read in daylight unless its in a dark place. But I love it

 

[YellowMP5]

I apologize for the delay, but while soldering your voltmeter I managed to melt one of the LED displays (which were the last two), and I had to order replacements... which arrived yesterday. Needless to say, I am very sorry, but stuff like that happens when I'm soldering at 2am in the morning. I apologize once again. I will ship your voltmeter by Express Mail first thing in the morning, and you should have it overnight.

no problem, i understand. you should have updated me though
if you have not sent it out yet, don't do overnight. save the money.
i am leaving florida in about 10 hours for NC and NOPI and won't be back until sunday midnight.

 

[Intruder]

no problem, i understand. you should have updated me though
if you have not sent it out yet, don't do overnight. save the money.
i am leaving florida in about 10 hours for NC and NOPI and won't be back until sunday midnight.

Oh well... It's my fault, so I sent it overnight. It should be at your door before noon tomorrow.

 

[YellowMP5]

got home from the trip on sunday and it was waiting for me. thanks a lot intruder.

before i start messing up and breaking things, let me know how this thing works.

there is "input" and "power". what is the difference? if i want voltage measured coming out of the battery, which connection do i use?

also, those little green posts on the back is where the wires attach? are those little screws inside? so i can just stick the wire in and screw it down?

thanks again. can't wait to install it "somewhere"

 

[Intruder]

there is "input" and "power". what is the difference? if i want voltage measured coming out of the battery, which connection do i use?

Power is power. It should be 12V constant.
Input is where you attach the "probes".

also, those little green posts on the back is where the wires attach? are those little screws inside? so i can just stick the wire in and screw it down?

Yes, you can just stick the wire in there and screw it down.

What you can do is this:
Connect both negatives to ground, connect the Input's positive to 12V constant (red wire), and connect the Power's positive to the 12V switched wire (yellow), or ignition wire. This way the voltmeter will measure your battery's voltage, and power up only when your key is in the ignition.

 

[YellowMP5]

ok thanks.
a few more questions. what is the temperature rating on the meter and the digital display? what is the maximum temperature it can stand up to?

there is a little screw on top of the blue box on the pcb, what is for?

 

[Intruder]

The maximum temperature? I woulds say that it is in the range of any other piece of electronics hardware. Why are you concerned with this? Do you have an application in mind which requires high temperature resistance?

The blue thing is a trimmer potentiometer and is used to calibrate the meter. I have already calibrated it, so you should not need to use that.

 

[YellowMP5]

well, i am building a rocket ship.... nah, just kidding.

i want to use it in my engine bay by the battery, will it stand up to that or will it melt over time, just curious...

 

[Intruder]

Hmm, maybe if you make a nice enclosure for it.... ?

 

[YellowMP5]

yeah, that's what i am doing anyway. but the display part would be exposed anyway. i'll try to install it in the next week or so and i will post some pics. hopefully you guys will like it.

 

[Dexter]

Hey, got any of the reds left? or well...any boards left, i can source and solder my own displays....

(lite-on for the blues? )

 

[Intruder]

Lite-on for the blues, yes.
I have plenty left (of all colors).

 

[YellowMP5]

so here is another question.

i picked up a switch at radio shack and it is rated at 5amps at 250vac. so is it safe to use this switch in automotive applications, i.e. when power is DC?

 

[Intruder]

Yes.

 

[YellowMP5]

DVM installed!

here are some pics of the installed display. all were taken at night and because of the flash, you can't see that the display is on - but it is. i also installed a switch which turns of the display when the hood is done to conserve on battery power and prolong diplay life.

Thanks Rick (redwagon02) for ******* around...uh, i mean helping me out. I wouldn't have done it with out you.