Search found 112 matches

by IHOXOHI
Thu Aug 13, 2020 10:15 am
Forum: Pyboard D-series
Topic: wbus-DIP28 button use?
Replies: 5
Views: 983

wbus-DIP28 button use?

Hi, I didn't find in documentaion how use the button on the DIP28... There is "booto" inscription...It looks that it's a boot button. So, is it just for reset withoot use of boot.py file? Nothing happen when I push it... Could it be possible to change function of this button for add an other user bu...
by IHOXOHI
Wed Aug 12, 2020 9:14 am
Forum: General Discussion and Questions
Topic: check lipo battery level?
Replies: 8
Views: 1291

Re: check lipo battery level?

Yep, Finally it's a little bit dangerous. It depends of the power of the computer which is charging. For me it's allright with a raspberry computer, but just with a laptop, battery is very hot during charging. I will try to add a voltage regulator, but maybe this will stop the charging ability??? Th...
by IHOXOHI
Wed Aug 12, 2020 9:09 am
Forum: MicroPython pyboard
Topic: Vbat use
Replies: 1
Views: 581

Re: Vbat use

Yop,

Ok, I understood that there isn't a way to charge a battery on pyboard (with fet diode).

No way. I have to use a specific charger like the powerboost 1000c from adafruit for doing that.

I have seen that it looks possible with the pyb-D and wbus28...
by IHOXOHI
Tue Aug 11, 2020 8:08 am
Forum: MicroPython pyboard
Topic: Vbat use
Replies: 1
Views: 581

Vbat use

Hi, I use a lipo battery on vbat pins... I ask to myself what's happen when battery is full and pyboard powered by usb. Is there an automatic switch for stop charging bat or have I to check level battery for save it at these times? Otherway, there isn't indication about level battery. Is there a pro...
by IHOXOHI
Sun Aug 09, 2020 8:55 am
Forum: General Discussion and Questions
Topic: check lipo battery level?
Replies: 8
Views: 1291

Re: check lipo battery level?

Hey, Finally, voltage divider works perfectly with just an oled display. I think that you can check correctly the level bat. But when I add 2 sensors (sgp30 and mcp9808), voltage fall down to a little value. Difference between full bat and empty bat is much more lower and it isn't possible to check ...
by IHOXOHI
Thu Aug 06, 2020 9:00 pm
Forum: ESP32 boards
Topic: Problem with drive WaveShare 2.7 inch B e-Paper
Replies: 10
Views: 2287

Re: Problem with drive WaveShare 2.7 inch B e-Paper

Yip,

With your code, you write black on black... ---> fb.fill(white)

Yup
by IHOXOHI
Mon Aug 03, 2020 7:09 pm
Forum: General Discussion and Questions
Topic: check lipo battery level?
Replies: 8
Views: 1291

Re: check lipo battery level?

Yop,
I tested with just 2 resistors of 10K for try something quicly. For moment, it looks perfect.

The count of my adc passed slowly, and clearly from 2449 to 2380 for 4 hours.

I will test with a zen diode too...

THANKS.
by IHOXOHI
Mon Aug 03, 2020 11:08 am
Forum: General Discussion and Questions
Topic: check lipo battery level?
Replies: 8
Views: 1291

Re: check lipo battery level?

Thanks.

I will try...

All the best.
by IHOXOHI
Sun Aug 02, 2020 2:56 pm
Forum: General Discussion and Questions
Topic: check lipo battery level?
Replies: 8
Views: 1291

check lipo battery level?

Hi, I would like use a pybstick from mchobby shop in a mobil way, so with a battery... On this board, there isn't a vbat pin... So I have connected a lipo battery of 3.7V - 400mAh on the vin pin... Powering is ok, and reload too... But it's not perfect, I can't known battery level for save the batte...
by IHOXOHI
Sun Aug 02, 2020 2:42 pm
Forum: General Discussion and Questions
Topic: simple USB interface using esp32?
Replies: 1
Views: 459

Re: simple USB interface using esp32?

Hi,

have you seen installation guide on esp32 in micropython doc?
http://docs.micropython.org/en/latest/e ... ckref.html

good luck...