Dude, thanks . I've been mashing my head into esps for a day. Have a large screen would not work now. After adding 5.5 volts.. so simple. Now I'm mashing my head for not thinking about this. Cheers
TFT_RST is to do a hardware-controlled reset of the graphics chip. I don't think it matters in the latest version of TFTe_SPI. I suppose there must be times when you want to reset your graphics device independently of your processor. If you ignore it, it will (should) reset with your processor. Lots of these displays have I2C markings, but are really SPI. Yup, your regulator is faulty, my ESP32 drives two displays and a bunch of LEDs from the 3.3V line. Or it may be your USB line that can't supply enough current. There are some early boards that have a 100mA regulator, later boards have a 500mA regulator.
Do i understand correctly that you power the esp32 through usb and put an external 5v on the display AND connect that to the vcc pin of the esp32? Why not power the display with an external 5v and ONLY connect ground. Now you have a short circuit on 5v, but maybe i misunderstood.
Hi Arnoud! I put 5v of external power to ESP32 & TFT. Also USB power to the jack. Behind the VIN pin (and presumably the VCC pin of the USB jack), there is a Voltage Regulator which regulates voltage to 3.3v.I can't see any short circuit, but maybe I'm wrong! :-)
If you look to the schematic on esp32.net/images/Ai-Thinker/NodeMCU-32S/Ai-Thinker_NodeMCU-32S_DiagramSchematic.png you see at the power-scheme that 5v and 3.3v are outputs (when usb is connected, there is a diode to protect the usb port, still it's not a good idea). So my guess is that you connect the ESP32 5V output to another 5V (external) output. Since they will never ever be exactly the same, a non-limited current will flow from the highest voltage to the lowest voltage. Maybe (as you say in the end) destroying your regulator. You can never couple 2 electronic devices to each other this way. If they use both roughly the same voltage; it will be enough just to connect the ground only. I hope I made myself clear. I made a simple drawing: tweakers.net/ext/f/cr6sZtKCo9JxUQExXsFTiOxH/full.jpg
Hey Arnoud! The 5v pin (or the VIN pin), it's an input pin and not output. You can see in the diagram which you just shown me that VIN goes to a 3.3v voltage regulator. As far as I know, it's perfectly safe to input 5v to that. There is no 5v output pin on the ESP32, but there is a 3.3v output pin. You realise that the two little clips are directly from a power supply right?! It's not a voltmeter! ;-)
I dont know what you mean with the 2 clips and a voltmeter. If USB is connected, the 5v pin can be used as an output (Same symbol as the 3.3v pin). But it's never a good idea to connect 2 powersupplies this way. I rest my case; at least there is a diode to protect. Thanx for the video; I watch them always as you can see!
Ahhh, ok! Yes, there were two power supplies! Incidentally, the reason why I used two power supplies was because the ESP32 wouldn't power from USB alone. I suspected that the AMS1117 was broken, but it wasn't. There was actually a faulty diode on it! That diode which you've just mentioned. It's too tiny for me to replace though, so I shorted it out! Now it works off USB alone as it should! Thanks for drawing the image too, I understand what you mean now. Maybe I need to read some more of my theory books, but I still don't see a short! Let's say for example, we have 2 x 3.7v cells - if you connect the cathodes together, and then connect the anodes together, it doesn't make a short, it simply increases capacity/amperage capability. The devices just draw current proportional to the resistance of the two cells, right? Thanks for watching my videos! Thanks for your feedback too! Sometimes, my viewers have better knowledge than I do! :-D
Dude, thanks . I've been mashing my head into esps for a day. Have a large screen would not work now. After adding 5.5 volts.. so simple. Now I'm mashing my head for not thinking about this. Cheers
Is there any video on ESP32 with 3.5" LCD ILI9481 or ILI9486
Supposed to use 3.3v and the USB isn't providing enough current, v isn't the problem originally
TFT_RST is to do a hardware-controlled reset of the graphics chip. I don't think it matters in the latest version of TFTe_SPI. I suppose there must be times when you want to reset your graphics device independently of your processor. If you ignore it, it will (should) reset with your processor.
Lots of these displays have I2C markings, but are really SPI.
Yup, your regulator is faulty, my ESP32 drives two displays and a bunch of LEDs from the 3.3V line. Or it may be your USB line that can't supply enough current. There are some early boards that have a 100mA regulator, later boards have a 500mA regulator.
They must have changed up the boards again, because the pair of ST7735R I recently bought don't work as wired as you've shown.
i cant use the sd card help
gr8t work...thanks..but Can I connect it with ESP32-CAM and show the video of the camera on the screen?
Thanks
bro can you connect esp32 with cam and tft?
can i ask, what are you using to power the device? Is it possible to use a lithium ion battery to charge?
Excellent video. Subscribed.
I wanna do this with my TV
You need more than 5V because the display takes some of the power from the ESP.
thats not how that works
@@pacman10182 you cant draw more than 200mA, but i already frgot what it was about anyways lol
@@eventhorizon8014 you can draw as much power over 5 volts as you want, I assume your mean over USB, thats got a current limit of 500 mA
@@pacman10182 kk, yeah... i was thinking on arduino again^^ that has a max of 200mA iirc, more and it'll grill the arduino
@@eventhorizon8014 thats also not how that works
Why do you keep moving the board while plugging in the wire? It doesn't line up. what a waste of time
great video mr! where i can get information of coding graphics for this screen, cheers.
just found it ruclips.net/video/7ER1fbDoc20/видео.html
alex le hi, you can get info about graphics from other youtubers. :)
This looks very fast, how does it compare to an ILI9481?
I'll have to check. :-)
Thanks.
Is touch supported?
TheRainHarvester not on this, no.
Do i understand correctly that you power the esp32 through usb and put an external 5v on the display AND connect that to the vcc pin of the esp32?
Why not power the display with an external 5v and ONLY connect ground. Now you have a short circuit on 5v, but maybe i misunderstood.
Hi Arnoud! I put 5v of external power to ESP32 & TFT. Also USB power to the jack. Behind the VIN pin (and presumably the VCC pin of the USB jack), there is a Voltage Regulator which regulates voltage to 3.3v.I can't see any short circuit, but maybe I'm wrong! :-)
If you look to the schematic on esp32.net/images/Ai-Thinker/NodeMCU-32S/Ai-Thinker_NodeMCU-32S_DiagramSchematic.png you see at the power-scheme that 5v and 3.3v are outputs (when usb is connected, there is a diode to protect the usb port, still it's not a good idea). So my guess is that you connect the ESP32 5V output to another 5V (external) output. Since they will never ever be exactly the same, a non-limited current will flow from the highest voltage to the lowest voltage. Maybe (as you say in the end) destroying your regulator.
You can never couple 2 electronic devices to each other this way. If they use both roughly the same voltage; it will be enough just to connect the ground only. I hope I made myself clear.
I made a simple drawing: tweakers.net/ext/f/cr6sZtKCo9JxUQExXsFTiOxH/full.jpg
Hey Arnoud! The 5v pin (or the VIN pin), it's an input pin and not output. You can see in the diagram which you just shown me that VIN goes to a 3.3v voltage regulator. As far as I know, it's perfectly safe to input 5v to that. There is no 5v output pin on the ESP32, but there is a 3.3v output pin. You realise that the two little clips are directly from a power supply right?! It's not a voltmeter! ;-)
I dont know what you mean with the 2 clips and a voltmeter. If USB is connected, the 5v pin can be used as an output (Same symbol as the 3.3v pin).
But it's never a good idea to connect 2 powersupplies this way. I rest my case; at least there is a diode to protect. Thanx for the video; I watch them always as you can see!
Ahhh, ok! Yes, there were two power supplies! Incidentally, the reason why I used two power supplies was because the ESP32 wouldn't power from USB alone. I suspected that the AMS1117 was broken, but it wasn't. There was actually a faulty diode on it! That diode which you've just mentioned. It's too tiny for me to replace though, so I shorted it out! Now it works off USB alone as it should! Thanks for drawing the image too, I understand what you mean now. Maybe I need to read some more of my theory books, but I still don't see a short! Let's say for example, we have 2 x 3.7v cells - if you connect the cathodes together, and then connect the anodes together, it doesn't make a short, it simply increases capacity/amperage capability. The devices just draw current proportional to the resistance of the two cells, right? Thanks for watching my videos! Thanks for your feedback too! Sometimes, my viewers have better knowledge than I do! :-D
nice
What library are you using for the display?
fake ! redtab st7735s ?? fail !!