https://www.amazon.com/LILYGO-T-Display-Arduino-Development-CH9102F/dp/B099MPFJ9M/ref=sr_1_1?crid=22W86TAJ86U62&dib=eyJ2IjoiMSJ9.WdzAc2BiSsUV5gydWjJu4pQiwBjdaiaoph2gEIDgPC6GJqaWa1GoNPCUYAxHqLZeVr52-BNHXf684eC22g5pA-6yvic99hdb7CAJiTd4yLj6gXEuWqh7Lt827wIraa5UsbnGgr8fpX-wBAqGCYhhQYjZ1PJqfMlza8S2PdtdVJYdu4HG99JtHXHHo89hu0xJqBc7pchk516Ki6aIlHmhWIQR3E8SEBSJVRWLrAU8UvQ.dwCNomSxLf2CDylFQo-mJFvBq2u9Xt0ZMdEtdlJ9tIk&dib_tag=se&keywords=lilygo+display&qid=1757965512&sprefix=lilygo+d%2Caps%2C209&sr=8-1 LILYGO ESP32 T-Display Module Development Board TTGO LCD Wi-Fi BLE CH9102F Chip amazon.com
> On Sep 5, 2025, at 4:21 AM, andy pugh <bodge...@gmail.com> wrote: > > On Fri, 5 Sept 2025 at 11:54, Viesturs Lācis <viesturs.la...@gmail.com> wrote: > >> Do I understand correctly that it has both LCD and ESP32 controller? >> https://www.aliexpress.com/item/33048962331.html > > Yes. > It might be worth looking on Amazon too, the few euros more that it > costs might be offset by less waiting and import hassles. > >> Display should be fine, IMHO 4 digits is enough (3 digits before and 1 >> after decimal point). > > There is a very poor quality video of the hobbing thingy that I made > here. It might give some idea of scale and appearance. > https://www.youtube.com/watch?v=cUCWbt37Fc4 > > I think that there is also a version with a larger screen, looking on Amazon. >> >> Ok, I might try it, seems like that listing has version with enclosure >> for almost 17 eur. I do not think that user would need to fiddle with >> it any kind of settings, scale factor and home position can be >> hardcoded. > > Might need a home switch / reset button? > >> The question is about encoder pulses - does this accept 5V inputs >> directly? > > As far as I can tell, no. A resistor divider should fix that. Unless > you can just run the encoder at 3.3V > Having said that, looking at > https://github.com/andypugh/LCD_Interface/blob/main/Documentation.pdf > it looks like I ran that encoder at 5V and it didn't blow up. > It might be better to run with 24V and an interface device, though, in > an industrial environment. (depending on what the encoder can do) > >> I did not yet check how fast would the encoder spin and what is its >> CPR, but I would like to think that ESP32 is fast enough - 1000 CPR >> encoder at 3000 rev/min is 50kHz pulse rate. IMHO should be fine >> especially if its only task is actually counting pulses. Or am I >> missing something? > > In the example I was limited by stepper motor velocity, so never got > as far as checking max encoder count rate. > -- > atp > "A motorcycle is a bicycle with a pandemonium attachment and is > designed for the especial use of mechanical geniuses, daredevils and > lunatics." > — George Fitch, Atlanta Constitution Newspaper, 1912 > > > _______________________________________________ > Emc-users mailing list > Emc-users@lists.sourceforge.net > https://lists.sourceforge.net/lists/listinfo/emc-users _______________________________________________ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
