Search found 490 matches

by mcauser
Thu Jan 07, 2021 5:11 am
Forum: Drivers for External Components
Topic: TCRT5000-driver
Replies: 3
Views: 302

Re: TCRT5000-driver

If you are using one of these modules, it has the resistors on board.
The A0 and D0 are analog and digital outputs. You can use one or the other, depending on your needs.
The blue potentiometer is for tweaking the D0 sensitivity - where on the analog scale it triggers.
by mcauser
Thu Jan 07, 2021 4:45 am
Forum: General Discussion and Questions
Topic: ESP8266 4x7 segment display
Replies: 3
Views: 239

Re: ESP8266 4x7 segment display

The TM1637 driver is just for common anode displays. MAX7219 can be used to drive both common cathode (normal) and common anode (reverse). Here's how you can wire it in either direction . If you just want more IOs, have a look into using an IO expander: MCP23008, MCP23017, PCF8574, PCF8575 Other LED...
by mcauser
Fri Dec 11, 2020 9:14 pm
Forum: Other Boards
Topic: WeAct STM32F411CEU6 black pill
Replies: 63
Views: 15653

Re: WeAct STM32F411CEU6 black pill

You can switch off USB mass storage in boot.py See: http://docs.micropython.org/en/latest/pyboard/tutorial/usb_mouse.html I think littlefs also doesn’t work with USB mass storage, only fat, so you could try reformatting it. Anyone else able to confirm this? ESP ports don’t have USB mass storage supp...
by mcauser
Sat Dec 05, 2020 10:17 am
Forum: Other Boards
Topic: [nRF52] I2C reconstruct issues
Replies: 3
Views: 230

[nRF52] I2C reconstruct issues

Found two few issues with HW I2C on the nRF52832. 1) Constructing a new I2C instance does not deinit the previous peripheral. 2) A soft reboot does not deinit the previous HW I2C. Running latest MicroPython on the Ebyte E73-TBB dev board (E73-2G4M04S1B module) MicroPython v1.13-221-gc8b055717 on 202...
by mcauser
Sat Dec 05, 2020 6:53 am
Forum: Other Boards
Topic: Simple cheap small board: NRF52 ?
Replies: 4
Views: 1109

Re: Simple cheap small board: NRF52 ?

EByte E73-TBB https://i.imgur.com/C4jyvFJ.jpeg Was pretty easy to flash MicroPython to it! EByte E73-TBB: https://www.aliexpress.com/item/4000516424563.html J-Link clone: https://www.aliexpress.com/item/4001335080402.html Install command line tools (on macOS): https://github.com/ARMmbed/homebrew-fo...
by mcauser
Wed Nov 18, 2020 3:29 am
Forum: Other Boards
Topic: [STM32F407VGT6] Board HELP!
Replies: 11
Views: 2453

Re: [STM32F407VGT6] Board HELP!

@wasp09 the board shown in that link above is a "DevEBox" from "MCUDev" in China. They normally sell them on mcudev.taobao.com, however some other shops on AliExpress are reselling them. If you look close in the top right corner on the back of the board, it says "mcudev.taobao.com". The same devs th...
by mcauser
Thu Nov 12, 2020 5:09 am
Forum: ESP32 boards
Topic: Four MCP23017 (I2C GPIO Expander) on one ESP32
Replies: 5
Views: 725

Re: Four MCP23017 (I2C GPIO Expander) on one ESP32

Roberthh is spot on. That's a lot of IOs! What are you building? You can only have 8x MCP23017 chips on the same I2C bus, unless you use something like the TCA9548A, which give you another 7x I2C busses - well, more like channels on the bus. https://github.com/mcauser/micropython-tca9548a 8x I2C bus...
by mcauser
Mon Oct 05, 2020 11:33 pm
Forum: Other Boards
Topic: Simple cheap small board: NRF52 ?
Replies: 4
Views: 1109

Re: Simple cheap small board: NRF52 ?

If you're interested in using the EByte E73-TBB, have a look at these three: https://medium.com/@ly.lee/bluetooth-mesh-with-nrf52-and-apache-mynewt-44823407c471 https://medium.com/@ly.lee/coding-nrf52-with-rust-and-apache-mynewt-on-visual-studio-code-9521bcba6004 https://ssihla.wordpress.com/2019/07...
by mcauser
Mon Sep 28, 2020 3:20 pm
Forum: Drivers for External Components
Topic: HZ-1050 125 KHz RFID Reader
Replies: 0
Views: 661

HZ-1050 125 KHz RFID Reader

MicroPython library for the HZ-1050 125 KHz RFID Reader:
https://github.com/mcauser/micropython-hz1050

Image