How To Interface A GC9A01 Round Display With Arduino & ESP32 - Voltlog #349

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#VoltLog #GC9A01 #Arduino

[ajmalghanty]

It touched my bank account and my passion for electronics at the same time! Ordered one! Thanks for showing us how it works :D

[DocMicha]

I see it as you. I make electronics since 35 years, it was never so available, cheap and easy. Nice video.

[michaelrogers]

Terrific, thank you! I picked up one of these boards hoping I could drive a simple animation, but almost gave up when I couldn't find anything but slowly changing still images. Your example is exactly what I needed. Thank you!

[UpcycleElectronics]

Cool display. Before getting hurt, I would have loved to use this with my supercharged Camaro project. I would have set this up as a gauge to display everything extra that I wanted to keep an eye on like boost, ignition timing status, water/alcohol injection, oil, radiator, and air temperature at the inlet filter, cylinder head, and headers.
Even before beginning the project to build the motor to add the supercharger, that car was a handful to drive with a manual transmission. Having a single gauge programmed to focus on what I needed to see would have been really nice.
This kind of project was my goal when I started messing with electronics after getting hurt. The doctors said it would take at least 6 months to fully recover. I thought that would be just enough time to learn this electronics thing well enough to build my own gauges. (I sure was naive)
Well, after what will be 8 years on the 26th of next month, I might be able to pull it off... but the half finished motor rusted after the first year, the car was sold after the second, and I'm still waiting for this 6 months of recovery to be over...but, on the bright side, I could probably, finally, achieve a project like building my own gauges. My skills aren't much better, but, yeah, it's amazing the level of peripheral libraries and copy/paste code available now. Not to mention, when having troubles with libraries these days, if one does the homework and asks good questions, the library authors are often very willing to help.

I just started messing with embedded linux, hacking around with uboot using hardware UART, and found a forum with a bunch of the guys from openwrt that are awesome and super helpful. I had no idea it was so easy to mess with quite a few devices I had sitting on my shelves. Amazing time to be alive :-)
-Jake

[SVader]

Completely agree with your thoughts about technological advancement making our hobby easier & better. I started out programming Z80 processors in assembly & sending FSK data at 300 bps. Thanks for the tip about this display. I just recently had 3 OLEDs & 2 LCDs on one of my projects. I used a multiplexer. Lots of fun.

[peterdlynes]

You helped me get my NANOesp32 working with a Waveshare 1.28" display. Thank you.

[tommidtommi]

With such an Display you could replace the magic eyes of old Tube radios

[AttilaAsztalos]

I do recognize how far electronics as a hobby has come since its beginnings, but I can't say I'm happy about it; quite the opposite, actually. Yes, it does make far more fabulous things available - but at the cost of increasingly insane complexity and volume of knowledge piling up that people supposedly become familiar with. Except they don't - it's an unavoidable tradeoff; brains haven't gotten bigger in the last century, only the racetrack got longer and longer and everyone still begins at the start. To cover all that ever-increasing surface of knowledge, the trade-off is an ever-reducing depth and an ever-faster skim-over. One thing electronics isn't today is "accessible" in the sense electronics hobby kits / circuit books of yore used to be, for any kid with the requisite interest and patience trying to wrap his head around this weird magic stuff. Yes, anyone can follow a ten-minute tutorial and have an Arduino blink an LED; but that's a far cry from what one used to achieve having built and understood how and why an astable multivibrator does the same. And yes, programming has the exact same problem...

[tseckwr]

Good review, you hit all the points important to programing and using the display -- including viewing angle...

[GeoffPritchett]

i wanna know how to program a gauge that looks like the one @ 1:54 with an spi screen

[galbox]

Great video!
I have just purchased one of these displays but it came with only 7 pins, not 8 as yours. The missing pin is "BLK" that you have connected to IO22. Others are same. Will your tutorial still apply if the BLK pin is not connected? Thanks!

[MaxSMoke]

What about mounting a 35mm glass cabochon on top of it? The domed glass on a round display should look VERY interesting!

[andymouse]

Fantastic vid, and yes it's important to enjoy the fun things that are happening now, as we continue to battle the bad things...cheers.

[ristomatti]

Very nice display! I wish it'd have the flat ribbon somehow in the back. Otherwise it would've maybe been possible to find a drill to make a clean slot for the display. I find I'm avoiding using displays as I can't seem to be able to cut clean enough rectangular holes. Still waiting for the day some module maker figures out to add some kind of a frame you could glue on to cover the rough edges!

[DBBahnospherix-BahnAtmospherix]

Hello, i need Help for The tft display 40x160 (160x40) - DRIVER: GC9D01 - i need a Grafic-Programm with esp32 - Thanks

[captmcloven]

Hello VoltLog. Can you please do an updated video on the esp32 with the GC9A01 display? The Arduino IDE for the GFX library has changed some coding. I followed your video to a T . I got the clock and hello word working but the Jpeg does not. My TFT screen shows ERROR: File system mount failed! Maybe you could shed some light on this problem. My board is HiLetgo ESP-WROOM-32 ESP32 ESP-32S Development Board from Amazon. Thank your for your great videos

[espero_dev]

Yea I bought 2 1.3" ones and took one apart to make smart glasses :)

[ipodrafael]

Hey, awesome video!
I want to use the GC9A01 display without the breakout board but I cannot find the how to get it to work without the breakout board (for space saving reasons). Would you happen to know what circuit i need to make to get the bare 12 pin GC9A01 LCD running?

[LuckyLAK]

Dear VoltLog, for a project of mine I would need a round LCD display but with 2.4" diameter. According to you SPI display can easily be driven by a Arduino board as the libraries for it are already available. I googled a little searching for a 2.4" display based on the same GC9A01 unit without success. It looks like that all the round lcd displays of around 2+" are based on other interfaces (MIPI, RGB...) Is it any easy to use other kind of round displays with Arduino?
tks in advance

[cyberclmbiana]

Nice. Are the touchscreen versions able to be programmed to be used as score keepers (which require user interaction)?