Divergence Meter Project Update 4: Are you excited? Because I am! It’s finally complete \o/

*Drum Rolls* *Cheers* YES it’s finally complete :’) THE DIVERGENCE METER IS COMPLETE !!! It took me a long time, it took me a lot of effort, it also caused me a lot of headaches but hey its complete!!!! Really awesome indeed, though I still have to tweak it a bit in the software, somehow release 0.1.0a of the software uses up a whopping 6KB out of 8KB of program space, I really hope to optimize the code and make the world line rolling much more visually accurate, otherwise it’s really awesome to look at especially at night ๐Ÿ˜€ the way nixie tubes display numbers gives that really special retro feeling yet it gives a futuristic feeling at the same time.

Now for some power consumption reports, well so far I’ve only had the thing on batteries with the longest duration of 2 hours but according to my estimations, measurements and fooling around(writing it down makes it science ;D ), I’ve found that it should run for around 4 hours on the lowest brightness settings and 11 hours on the highest. One thing I did though design in an “adaptive brightness” feature into the thing. Basically it uses an LDR (Light Dependent Resistor) and the device measures the environments brightness, when it’s dark it turns the display darker to save power and when it’s bright it turns up the display to make it easier to see.

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Divergence Meter Project Update 2

So exams are done and hell that was crazy, 2 weeks of painful mind torture XD anyways today the Nixie Board of the Divergence Meter is finally assembled >.< !!!!!

Here are some pics ๐Ÿ˜€

Here we have the front view, nothing really special. Though the female pin headers had to be filed down a bit so that it would fit the height constraints and that’s why they look like that, but the electrical contact and tightness is still great. I didn’t really clean the board before taking a photo so uhh….deal with it :p

Front view of the board
Front view of the board

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Divergence Meter Project Update 1

AND ITS HERE! The boards finally came from the fab and they surprisingly good for such a cheap price (~240HKD) They even sent an extra 2 for a total of 12 each ๐Ÿ˜€ )though the smaller print on the silkscreen is still missing that special touch but otherwise it looks really good.

Here’s a photo of the boards, some of the chips and the Nixie Tubes (only 6 T.T got to buy 2 more)

Left board: Nixie Tube Board Right Board: Main Board
Left board: Nixie Tube Board Right Board: Main Board

The left board is the Nixie Tube board where the HV5622 and the Nixies will sit and the right one is the Main board where the power supply and control circuitry go. The chips from top to bottom are HV5622, DS3232 and the MAX1771 (Not gonna use it in this design but it used to be on there!) I got those 3 chips for free as samples from Microchip and Maxim so big thanks to them! The tubes were from my sister so big thanks to her also!

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Divergence Meter Project

Edit: It’s complete! Click here to go see it!

I’m currently making a divergence meter replica based on this guys design

Though of course I have added my own twist to it and have some added features.

The main differences are:

  1. Additional Features:
    • 5 switches possible! Could be less if you tweak the software
    • Buzzer/Speaker output ๐Ÿ˜€ hurray for alarms in the morning
    • Light Sensor to detect night time to conserve power and extend Nixie tube life (could probably act as a basic motion sensor with some software magic)
  2. Improvements/Slight changes:
    • Should be able to fit 2x9V batteries instead of one so more portable cosplay time ๐Ÿ˜€
    • Should be able to fit 2xAA RTC backup battery so it keeps track of time accurately for theoretically over a year.
    • Interrupt based instead of Polling to conserve even more battery
    • Uses the larger but cheaper and more available version of the HV5622
    • Integrated switching power supply instead of a bought module
    • Uses an AVR instead of a PIC (I chose it because it can be reprogrammed by AVR tools and a PICKIT2 if you happen to have anyย of those)
    • Mostly SMD parts to make look all good when your showing off the innards XD
    • Miku silhouette included
  3. Limitations:
    • Can only use the DS3232 RTC and not the DS1307

Other than that it should be largely the same ๐Ÿ™‚

Here are some not so 3D 3D models :3

Main Board 3D Model:

A 3D model generated by Diptrace of the Divergence Meter Main Board
A 3D model generated by Diptrace of the Divergence Meter Main Board

(I didn’t know what to add in the battery area so i just stuck a Miku silhouette in there :3 )

Nixie Tube Board 3D Model:

A 3D model generated by Diptrace of the Divergence Meter Nixie Board
A 3D model generated by Diptrace of the Divergence Meter Nixie Board

Just to let you know I don’t even know if I can do this, so don’t get your hopes too high lol I just wanted to share this with you all~~~~~ I got most ofย the parts but I’m currently waiting for the PCBs to come from the fab so after that I’ll begin assembling it ๐Ÿ˜€ I hope in time for the summer anicon so that I can show it off :p oh and if you want you could give out some ideas that I can implement in software (not in hardware cuz thats already set in stone)

El Psy Congroo


Want to continue? Go readย Update 1!

NOTE: The divergence meter is a fictional device from the anime Steins;Gate, it’s used to calculate the Attractor Field of a universe/timeline so that they can be differentiated. For more information go toย http://steins-gate.wikia.com/wiki/Divergence_Meter