Arduino Reflective LCD

[@upir_upir]

All the source files are here: github.com/upiir/arduino_reflective_lcd_display

[@Splarkszter]

The aliexpress link is sold out :)

[@korpijeesus]

upir has better photopea tutorials than actual photopea tutorials

[@sfsilva1100]

Over the last few days I've been watching your videos, especially the projects with Nextion, Gauges and the use of Photopea tools.

[@sjm4306]

Nice, yet another display to add to my collection! Kind of reminds me of the old nokia 84x48 displays, they could run off such little power (with no backlight of course) it was amazing!

[@alainmilette6460]

I'm glad I'm not the only one collecting just about all types of displays 😂

[@andymouse]

That's quite a slick display, and plenty of applications....cheers !

[@necoinside]

While using standart arduino uno (or simialar 328p based) boards, if you drop the supply voltage to 3V3, you have to run it with 8MHz or lower crystal frequency(or with internal crystal).

[@Incommensurabilities]

while potentially unstable, it can be possible to run a 5V arduino at lower voltages. For example I have a project that is powered directly by a lithium battery, which can go as low as about 3.3V

[@necoinside]

@@Incommensurabilities this is something like, "I've never wore seatbelt while driving car and never died. So wearing seatbelt is useless." Just you need to open datasheet and search for "Speed Grades" if you really want to use under 4.5V. There is a technical chart that shows which frequency you can use on which supply voltage. It will absolutely cause noncommunication, bad timing and resetting issues. Wear a seatbelt everytime by the way. (:

[@AK-vx4dy]

From thumbinal i was sure that is e-ink, what a contrast and almost black color, wow

[@bimokayoba]

Your tutorials touch every software and hardware, wow, keep that good work 😊 I will support you 💯❤

[@robonator2945]

I've always been curious, how long would a display like this last if you just added a small capacitor to it? Surely you could functionally immitate an E-ink display in terms of non-volatility with a quite small capacitor given how little energy they draw, right?

[@upir_upir]

That´s quite interesting idea. Based on my rough calculations, a small electrolytic capacitor might provide power for 10-20 seconds if you update the display fast, so not very long. It will be probably a few minutes if you lower the refresh rate and probably even more if you just don´t update the content.

[@robonator2945]

​@@upir_upir I was just referring to a completely static display, basically how large of a capacitor would be necessary to emulate the non-volatility of an E-ink. (the exact usecase would affect how long of a delay that needs to be of course, but it's interesting to think about. If you could get a multi-week lifetime out of a reasonably sized supercapacitor or something then they're actually competing fairly well with e-ink there.)

[@tde04014]

But it will still draw power, which have to be recharged again, so there is nothing to win here, e-ink don't draw any power while the display is not refreshing

[@jerrymk6846]

10uF ceramic cap kept mine on for several minutes, but the contrast does decrease as time goes on, noticeable after maybe 3 minutes? A larger electrolytic capacitor should allow you to wake the microcontroller and mosfet to the display every 5 minute or so, with minimal average current draw.

[@jerrymk6846]

and if you refresh the display constantly, it’ll only last like 3 seconds before fading out.

[@eugeniusz7144]

Btw I learned the hard way why having an e-ink display for a smartwatch is a bad bad bad idea. When exposed to sun it degrades really quickly and image corrupts. It has to be heavily protected not to even last but to work properly...

[@maybethiswillwork]

I want to build a calculator using this display and esp32, so thanks for this tutorial upir :)

[@danialothman]

surprisingly crispy lcd display

[@janmachacek4866]

Hi. I really enjoy your projects. I would love if you made a slot machine with arduino!

[@upir_upir]

Thank you. A slot machine project is currently not on my todo list, but who knows, maybe I will change my mind in the future :)

[@Cyber_Gas]

@@upir_upir have you considred av tv projects?

[@thelightwielder]

I thought the UNO had a dedicated 3v pin...

[@upir_upir]

It has, but the logic pins are still 5V, and you need all the pins to be 3.3V.

[@thelightwielder]

@@upir_upir thanks

[@inspectormadshit151]

Please make a video about how to power up arduino setups that need an external powersupply, like an arduino and 3 steppermotors sharing the same powersupply, so u only need one battery or one wall cable .

[@TheWebstaff]

Yes to esp32 rerun!

[@fujie-web]

Good job Guy ;oP Still as good and interesting :oP

[@AparaAnalyticals-d2k]

This display showing are SDA, SCL connection for the I2c but you connected the SPI type its possible??

[@ThalysCosta]

Hey man! How’s it going? Could you show us how to read OBD2 with Arduino and get information like RPM, for example?

[@frowin2]

How much current is drawn when it’s not refreshing?

[@ekhalilov5543]

ESP32 Pleeee...aaase ♥

[@mobber2k]

duuuude i want to do this on a fiat 600 so badly

[@ilyagorodetskiy4748]

How do you connect this to a car tho?

[@Incommensurabilities]

Good question, you would likely need to tap into the CAN bus somehow

[@Cyber_Gas]

Its out of stock :(

[@upir_upir]

Let me update the link, there are other shops on AliExpress that have this still on stock. Or just search for ST7302 and you should be hopefully able to find it.

[@Влад-д2и4ъ]

Hi. I have question. There should be 4 screens in my project. Right now I am using an Arduino Mega and a 1.3 inch OLED on the SH1106 chip and connecting it via SPI. My task is to update each screen without blocking the others. I tried using the FreeRTOS library, but it still doesn't work, since it seems that the u8g2 library uses one buffer for the screen even when I create several display classes. Don't know how to update multiple screens at the same time?

[@TheBodgybrothers]

Please remove the shipping plastic when making videos.

[@viktorkunz189]

Sorry, this is too weird to watch. Not the content, but the audio!