Search found 1342 matches

by deshipu
Fri Feb 08, 2019 10:51 am
Forum: ESP8266 boards
Topic: SX127x (LoRa transceiver) driver for (Micro)Python on ESP8266/ESP32/Raspberry_Pi
Replies: 8
Views: 2510

Re: SX127x (LoRa transceiver) driver for (Micro)Python on ESP8266/ESP32/Raspberry_Pi

Neither the ESP8266 chip itself, not the ESP8266 modules, have a 3.3V voltage regulator. There is usually a voltage regulator on the development boards, but it varies between the board make and version, so there is no single answer to that.
by deshipu
Sat Jan 12, 2019 5:04 pm
Forum: The micro:bit
Topic: Receiving radio packets with NRF24L01
Replies: 6
Views: 2784

Re: Receiving radio packets with NRF24L01

Nordic Semiconductors is pretty much the only reputable brand of NRF24L01 chips ;-)
by deshipu
Fri Jan 11, 2019 4:25 pm
Forum: Other Boards
Topic: Looking for a board with 16 ADC channels and WiFi
Replies: 8
Views: 284

Re: Looking for a board with 16 ADC channels and WiFi

Just use your NodeMCU and add an external ADC chip. For example, here is a library for ads1015, which has a lot of cheap breakouts available: https://bitbucket.org/thesheep/micropython-ads1015/
by deshipu
Tue Jan 08, 2019 6:00 pm
Forum: The micro:bit
Topic: Radio communication (Nordic Gazell)
Replies: 1
Views: 95

Re: Radio communication (Nordic Gazell)

In theory, the "radio" module uses exactly the same protocol as NRF24 does, and it should be possible to have them communicate out of the box. In practice, I've spent several weeks trying to get that working, and failed — I only managed to receive about 1 in 1000 packets on the NRF24 side, and mangl...
by deshipu
Fri Jan 04, 2019 11:05 am
Forum: ESP32 boards
Topic: ILI9225 TFT display driver
Replies: 6
Views: 334

Re: ILI9225 TFT display driver

Roberthh wrote:
Fri Jan 04, 2019 8:39 am
b.t.w.:
"rocket surgery" = "rocket science"[0] + "brain surgery"[1]
dropping: "science brain"
I always visualized it as similar to laser surgery, only with rockets instead of lasers.
by deshipu
Thu Jan 03, 2019 9:17 pm
Forum: ESP32 boards
Topic: ILI9225 TFT display driver
Replies: 6
Views: 334

Re: ILI9225 TFT display driver

Just take one of the existing drivers, take the datasheet, and make it. It's not rocket surgery. You will probably only need to make small modification to the initialization commands, everything else should be exactly the same.
by deshipu
Fri Dec 21, 2018 10:29 pm
Forum: The MicroPython pyboard
Topic: OpenMV M7?
Replies: 9
Views: 263

Re: OpenMV M7?

what is the point of PyBoard, other than having a few more I/O channels and pins? The price is one important difference. But generally speaking, they are two completely different systems made completely different people working at different companies. PyBoard tries to be a general-purpose developme...
by deshipu
Wed Dec 19, 2018 8:57 am
Forum: Drivers for External Components
Topic: Drivers for OLED displays and portable GUI
Replies: 6
Views: 678

Re: Drivers for OLED displays and portable GUI

In case anybody finds it useful, I wrote an article about handling the small OLED displays without a library: https://hackaday.io/page/5722
by deshipu
Fri Nov 16, 2018 11:47 pm
Forum: General Discussion and Questions
Topic: New cheap OLED screen
Replies: 9
Views: 442

Re: New cheap OLED screen

I have it, it's a TFT. An OLED display of this resolution (and color!) would need much more electronics on the back to generate by the high voltage necessary to drive a whole row of LEDs. While the low-resolution mono OLEDs get away with a simple charge pump, and only need external capacitors, somet...
by deshipu
Thu Nov 15, 2018 8:31 am
Forum: General Discussion and Questions
Topic: New cheap OLED screen
Replies: 9
Views: 442

Re: New cheap OLED screen

That is not an OLED, it's a regular TFT, the same as https://www.adafruit.com/product/3787