Have any of you tried to use custom, multiple digit 7 segmen

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>>1214162
Layout of original board looks a similar to fig 8 from the article.

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>>1214162
No, never.

From what you're describing it sounds like a multiplexed LCD.

You're not going to be able to get that many voltages from an Atmega. You're going to need to step down/up whatever your source voltage is.

To control your LCD you're probably going to want to use a driver with a built in shift register. Sounds like you have 12 pins, so get something with a 12 bit shift register.

>>1214162
many manufacturers make driver ics specifically for driving various numerical displays of all types you could care to name.
don't reinvent the wheel.

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>>1214200
the problem is, my LCD is marked as CM4196t which probably stands for chinese control board of my coffee maker and I can't find anything about it.
I'm also thinking about designing my own board for cheap calculators and selling them as school cheating machines.

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I just figured that I can increase voltage on each backplane node by switching on internal pull-up.
Assuming they are about 40k, with 12k external pull-up and 12k external pull-down I get three levels:
low (0V) with PORTCx == 0, DDRCx == 1
middle (2.5V) with PORTCx == 0, DDRCx == 0
high (5V) with PORTCx == 1, DDRCx == 1.

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>>1214164

schematics are a language. please dont speak it like a retard; strive for clarity.

>>1214238
For pullup on you want PORTCx = 1.

>>1214162
What kind of coffee maker measures microsievert per centimeter

>>1214819
Japanese ones, obviously.

>>1214871
>the cesium, it burns

>>1214162
Some PIC and AVR microcontrollers have LCD segment drivers built-in. Consider one of those, or at least read the hell out of the datasheets and app notes so you understand what sort of waveforms you'll want to drive them with.

>>1214213
That's the coffee model. Number.


If you can't find a stamp on the icon it's proprietary and you'll have to reverse engineer it.

If you don't know how to do that i suggest you just get a screen that fits and is OLED. Then draw what you want with your own control board.

If all you care about is that LCD, call the manufacturer cause it's not easy getting one painted like that. That's not just 7 segment. It's proprietary and custom.

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My three state voltage seems to work, I can display single segments on it. I will post video in a sec.
>>1215294
It's Russel Hobbs 19590-56. Looks like branded chinese device.
>>1214602
ok, I fixed it.
>>1214238

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>>1214891
>>1215294
I don't really want to spend too much money on this project desu.

Webm shows looping throu all the backplane 1 values.

>>1215540
Bretty gud. Are you driving them with ac? If not, you can damage the segments. See
http://ww1.microchip.com/downloads/en/AppNotes/doc8103.pdf

>>1215551
I'm not sure what do you mean by driving them with AC. Interrupting and changing state of backplanes? at My code is quite similar.
https://pastebin.com/EftZppzj

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>>1215567
Berry gud. The only suggestion I could make is to run your complement state right after your true state but I'm not even sure that matters. Cheers!