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 electriFi tutorial: build your own OLED display

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Kurz


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Re: electriFi tutorial: build your own OLED display
« Reply #30 on: May 13, 2020, 11:10 AM »
How manu mAh would you recommend? Because I'd have to make everything fit in a gauntlet

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Kazya Rembrea


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Re: electriFi tutorial: build your own OLED display
« Reply #31 on: May 13, 2020, 11:15 AM »
You're prolly not gonna find anything bigger than maybe 1200 or 1500 that's gonna fit easily in a gauntlet... I have some the size of a credit card and about a quarter inch thick that I use in my welding helmet for my fans that MIGHT fit, depending on your gauntlet. I searched high and low for something the size of a 9v or a little bigger and didn't come up with a whole lot... Considered running a cable up my sleeve before deciding to just use a 9v, but I'm using a smaller screen too.

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Kurz


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Re: electriFi tutorial: build your own OLED display
« Reply #32 on: May 13, 2020, 11:34 AM »
You're prolly not gonna find anything bigger than maybe 1200 or 1500 that's gonna fit easily in a gauntlet... I have some the size of a credit card and about a quarter inch thick that I use in my welding helmet for my fans that MIGHT fit, depending on your gauntlet. I searched high and low for something the size of a 9v or a little bigger and didn't come up with a whole lot... Considered running a cable up my sleeve before deciding to just use a 9v, but I'm using a smaller screen too.
Gauntlet will be scratch built. I'm waiting to see how much space i'll need, so thats not a big problem.

Was thinking about one of these two.




10000 or 5000 mAh. They dont seem too bulky to fit in a gauntlet... thoughts? Would I be able to throw in a 2 or 3 led in addition?

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Fi-8015


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Re: electriFi tutorial: build your own OLED display
« Reply #33 on: May 13, 2020, 12:44 PM »
Seems a bit overkill in my oppinion, but if you have the space, there is no issue using them. I always use the smallest ones with about 2500 mAh. Adding LEDs will be no issue as well (asuming we are not talking about high power LEDs, but LEDs with a current of about 20 mA).

Some further words on the maximum current issue:
I found several current limiting factors, but none of them should apply in this case, so in theory you can feed all your needed current through the micro-USB port of the nano. Lots of older entries say, that 500 mA is the maximum, but that's because USB was once specified that way. Every USB wall charger or powerbank supplys more than that.
I still am a bit uncertain to feed high currents (> 0,5A) through the nano, but in theory it should be possible.
But be careful when using the VIN pin for power supply afterwards agin! The voltage regulator connected to that pin has strict limitations and even though you may power a lot of things via USB it may fry the nano, if you try to power them via VIN.
You won't get much trouble, but a small cloud of funny smelling fumes will tell you, that the regulator quit it's job.

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electriFi - Mando Electronics English / German

Kazya Rembrea


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Re: electriFi tutorial: build your own OLED display
« Reply #34 on: May 17, 2020, 09:09 AM »
Thank you for posting all these steps! I'm gonna give it a go when I get everything in!




My goal is to incorporate the LED button on the gauntlet to give it a bit more character. How long does a 9v usually run the screen?

Hey did you ever get around to trying out those switches? The light-up toggles that I bought were drawing too much power off the 9v and not letting enough to the board to run the screen.

Also with a regular switch I ran my screen for 6 hours yesterday and battery isn't dead yet.

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Re: electriFi tutorial: build your own OLED display
« Reply #35 on: May 21, 2020, 10:57 PM »
I'm using an Adafruit ST7789, Adafruit Feather Express M4 and a Lipo 820mAH battery by EEMB. The board is a 240x240 TFT display. All of it should easily fit into my gauntlet and I'm in the process of creative the cavities for the parts now, but have yet to actually assemble or test any of the electronics. I'm still awaiting the battery, which I just ordered today.

I'm not sure about getting a breadboard or if I should just get some wire and go for it first. I'm just following directions that are very clear and available online so I'll probably just continue shaping my vambrace for the parts once the battery gets here and then just jump right into the soldering once I know my parts all fit into their enclosures. At any rate, here's a bit of what I have:








Any idea how long this battery, https://www.amazon.com/gp/product/B082152887/ref=ppx_yo_dt_b_asin_title_o00_s00?ie=UTF8&psc=1 , would run that display for?

« Last Edit: May 24, 2020, 12:55 PM by BearCubsTeacher » Logged

Kurz


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Re: electriFi tutorial: build your own OLED display
« Reply #36 on: Jun 02, 2020, 01:25 PM »
Thanks for your tutorial!
I know, soldering isn't fancy but it gets the job done.


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Re: electriFi tutorial: build your own OLED display
« Reply #37 on: Jun 06, 2020, 05:08 PM »

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Re: electriFi tutorial: build your own OLED display
« Reply #39 on: Sep 01, 2020, 06:32 PM »
So I'm jumping into this head first ;) I have a set of April Storms Rav gauntlets on the way, one has a spot that fits a 1.5" digital photo frame as she suggests to use to get these effects. 

I'm wanting to use this set up instead for obvious reasons. 

Found these FTCBlock Mini Nano V3.0 ATmega328P Microcontroller on amazon: https://www.amazon.com/gp/product/B07H346KVG/ref=ox_sc_act_title_1?smid=A278BT9THV444Y&psc=1 

Any suggestions on a screen that will work in 1.5".....or can I make a 128x128 work? 


Thanks!

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Fi-8015


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Re: electriFi tutorial: build your own OLED display
« Reply #40 on: Sep 02, 2020, 06:19 AM »
There are rectangular (1:2) OLEDs with 1.54" diagonal. The question is, which aspect ratio the spot on the gauntlet has.
Maybe the 0.96" display would fit better, with an added frame.
The animations I supplied, are only for 128x64 displays. You can modify them to show on bigger screens, but it will only use the same space, the rest of the display would remain unused.

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Re: electriFi tutorial: build your own OLED display
« Reply #41 on: Sep 02, 2020, 06:51 AM »
I decided I wanted to incorporate electronics into the chest box for my pilot.  I like the EKG and Readout animations that Kazya Rembrea offers, but a 1"x.5" screen seems a bit small for the application though, no offence to Kazya, I am considering your sale thread even though.  What's the biggest screen you would recommend with these instructions and coding?

Fi-8015


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Re: electriFi tutorial: build your own OLED display
« Reply #42 on: Sep 02, 2020, 07:59 AM »
The largest I found and used was 2.42"

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Re: electriFi tutorial: build your own OLED display
« Reply #43 on: Sep 02, 2020, 06:40 PM »
Ended up just getting the .96" screen for now to see how well I can do all this ;) $12 with a spare board with worth a test  :laugh:

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Matchstick1021


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Re: electriFi tutorial: build your own OLED display
« Reply #44 on: Sep 03, 2020, 10:23 PM »
Hello vod! First off thank you for this amazing tutorial itís super easy to follow even for a complete newbie like myself.  :laugh:

However since I know nothing about this kind of stuff I have a question. When I try to compile your code it throws me this error (please forgive the bad picture I just snapped a quick picture to show the issue I am having)

Has anyone else had this issue? Is it something on my end?
Any help is greatly appreciated!

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