Search found 23 matches

by russ_h
Sat Aug 15, 2020 5:02 pm
Forum: Hardware Projects
Topic: omni directional dead reckoning
Replies: 1
Views: 295

Re: omni directional dead reckoning

Excellent work.
by russ_h
Sat Aug 01, 2020 7:22 am
Forum: ESP32 boards
Topic: touch driver for ttgo watch 2020
Replies: 2
Views: 383

Re: touch driver for ttgo watch 2020

Grab the focaltouch driver from Franz Schaefers' repo at https://gitlab.com/mooond/t-watch2020-e ... altouch.py and copy it to your watch.

See https://github.com/russhughes/st7789_mp ... ch_draw.py for a simple drawing program example.
by russ_h
Tue Jul 28, 2020 7:01 pm
Forum: ESP32 boards
Topic: Brightness control on ST7789C/ AXP202
Replies: 3
Views: 312

Re: Brightness control on ST7789C/ AXP202

The docs I read say the blacklight is driven off the axp202c LDO2 and it's voltage is configurable between 1800mv (1.8v) and 3300mv (3.3v). I have not tried this but you could try using setLDO2Voltage to change the voltage driving the backlight. axp = axp202c.PMU() axp.enablePower(axp202c.AXP202_LDO...
by russ_h
Sat Jul 25, 2020 7:46 am
Forum: ESP32 boards
Topic: TTGO T-WATCH-2020
Replies: 72
Views: 8296

Re: TTGO T-WATCH-2020

My watch arrived and I was able to get a modified devbis driver to run on it.
by russ_h
Sun Jun 14, 2020 8:54 pm
Forum: Programs, Libraries and Tools
Topic: Control dc motor speed - PID controller
Replies: 2
Views: 419

Re: Control dc motor speed - PID controller

I'm fairly new to PID controllers myself, if you are new to PID controllers as well, play with this PID Simulator to get a feel for how the different terms will affect performance. It helped me get a better feel for PID tuning. I was working on something similar using an Arduino and saw the same kin...
by russ_h
Mon Jun 08, 2020 9:32 pm
Forum: General Discussion and Questions
Topic: Generating autodocs for upython
Replies: 6
Views: 740

Re: Generating autodocs for upython

I used the Sphinx sphinx.ext.autodoc extension to document my last MicroPython project. In my conf.py file I added the projects lib directory using sys.path.insert and autodoc_mock_imports for the rest of the modules. sys.path.insert(0, os.path.abspath('../../lib')) # add my lib modules autodoc_mock...
by russ_h
Tue Jun 02, 2020 5:28 am
Forum: Hardware Projects
Topic: MicroPython based 3D printed drawing robot powered by a TTGO T-Display
Replies: 9
Views: 1250

Re: MicroPython based 3D printed drawing robot powered by a TTGO T-Display

Sounds like you have put a considerable amount of time and effort into developing this project. I notice you have also created great dos as well. If you were to guess the total hours to get your design to this standard how many hours do you think you have spent?? Thats hard to say. I wrote the firs...
by russ_h
Tue Jun 02, 2020 5:05 am
Forum: Hardware Projects
Topic: MicroPython based 3D printed drawing robot powered by a TTGO T-Display
Replies: 9
Views: 1250

Re: MicroPython based 3D printed drawing robot powered by a TTGO T-Display

Did you design all the hardware yourself?? Yes, but the idea is based on the Low-Cost, Arduino-Compatible Drawing Robot by MakersBox. After doing a class with MakersBox's design, that was scheduled for 2 hours but ended up running for 6, I wanted something easier and quicker to build for beginners....
by russ_h
Tue Jun 02, 2020 12:44 am
Forum: Hardware Projects
Topic: MicroPython based 3D printed drawing robot powered by a TTGO T-Display
Replies: 9
Views: 1250

Re: MicroPython based 3D printed drawing robot powered by a TTGO T-Display

OutoftheBOTS_ wrote:
Mon Jun 01, 2020 10:08 pm
That's quite impressive, not an easy thing to achieve that accuracy.

I like how you stamp it rather than try to drag the pen, is this how you get better accuracy??
Since the bot turns pretty slowly, I lift the pen during rotations to avoid leaving a blob of ink.
Russ
by russ_h
Tue Jun 02, 2020 12:27 am
Forum: Hardware Projects
Topic: MicroPython based 3D printed drawing robot powered by a TTGO T-Display
Replies: 9
Views: 1250

Re: MicroPython based 3D printed drawing robot powered by a TTGO T-Display

just really impressed by how well you documented this project. Also you seem to have gone the extra mile with the ui/font and preloaded fat image to download. Thank you. I was hoping the preloaded fat image would help beginners get started. I used an arduino version of the bot for classes I gave at...