Torke Box V2.0

[Torkemada]

Hi all,

I just finish my second VV mod based on OKR-T (stepdown converter).

3.1-6.4 v
Resetabile fuse
Voltmeter (small refresh rate)
Works great with any atty,carto,clearo

 

[jmanning]

Very nice! What batteries are you using?

 

[slimest]

And what voltmeter please. Small refresh rate, so it does not flash?

 

[Torkemada]

I use TrustFire Protected 3.7V 900mAh 14500 Lithium Battery (2)-last all day at 4.2 volt
Voltmeter is from China,zero flash


Display Type: 0.36" LED digital tube, 3 digit
Power Supply: DC6-30V
Refresh Rate: about 300mS / times
Range: 0-100V
Input Polarity: DC voltage
Overload Capacity: 4 times range
Input Impedance: 100Kohm
Accuracy: 0.1% (±1 digit)
LED Size: 22.5 mm×14mm
Board size: 26×17mm
Operating Temperature: -40 ℃ -85 ℃
LED Color: Red

 

[Quigsworth]

Tork, from the pic that looks like a 3 wire meter...from what I've read on the ebay sellers sites those need an independent power source other than the source you are trying to meter (ok fine, I get that)...but then I thought, if you power the meter directly off the batts (before the reg) does that constitute an independent power source?...is that what you did?...and my last and even dumber question, does it work?

Cause if that's the case, why aren't we using LCD meters?

 

[CraigHB]

You'd have to find one first. You can get small segmented LCD displays like this, but then you need the electronics to measure voltage and drive the display. I haven't seen small voltmeters other than the LED ones people are using. You don't necessarily need three wires if the device is designed with a wide operating voltage, regardless of the display type.

 

[slimest]

Torkemada, can you put here the link to the voltmeter source?

 

[Barryg41]

I found these. It even comes with a flange for above level mounting.

http://www............com/fm-store/402798/211198398/0-36-LED-Voltmeter-0-100V.html

There are others to pick from colors, mounts. it's made by the same pcb maker. Three wire connection!

I must doing something wrong or violating rules for the link. I just searched for low refresh voltmeter led. Sorry about the link.

 

[notsmoking]

Here is one of the ones that I got off ebay Digital Voltmeter Panel DC 0-100V Green LED Voltage Power Monitor Electric Meter | eBay

 

[slimest]

Seems that TS used a smaller voltmeter... Maybe I am wrong...

 

[Quigsworth]

The MV meters (typical) have a face of 23mm x 14mm...I've looked high and low for smaller (smaller font? 2 digit?)...if anyone has found something, please share...

 

[slimest]

My meters are the same size... Seems that they made in the same factory

 

[Torkemada]

This is the smaller 3 digit display i can found with a small refresh rate
i connect 2 wire (red and black) to batery + and -,green to atty+ because its operate at minimum 6 volts