You are reading a single comment by @stephaneAG and its replies.
Click here to read the full conversation.
Espruino is a JavaScript interpreter for low-power Microcontrollers. This site is both a support community for Espruino and a place to share what you are working on.
@stephaneAG
Hi there !
back on this project ;p
-> I received the said charger/booster and 'll test the pullups pins stuff ;)
-> I also had answers from the Adafruit support team, as such:
https://forums.adafruit.com/viewtopic.php?f=8&t=147139.
So, before trying the said pullup thing, I have to try powering ~40 leds fully bright from one ( or more in parallel ? ) 3.7V 18650 batteries & powering an original Espruino board ( maybe later a Pico but I no longer have any handy ; ) ), yet for programming/flashing/debug reasons, I wish to be able to keep the USB connection to the laptop.
I currently disconnect the battery jst connector when being connected using USB while the leds are getting power from the 3.7V battery & no problem has rosen yet, but I'm wondering how the board would react if I were to keep both USB and battery on JST connected ( the leds are getting power directly from the battery, not from the Bat pin, when usb is connected or not )
Also, it seems I couldn't talk to the board when putting a 1000uF 16V cap across the battery power source & Gnd ? ( the board was recognized, but I couldn't get a working serial comm, even when using an external ftdi adapter & trying on hardware serial ports .. ( espruino original ) .. may it come from CTS/DTR left unconnected ? I'll have to try using bluetooth .. )
This being said, I'm onto modding my current code to try the said ~40 leds, hoping I can have them 'blinking in sync' & last longer at least a minute ..
ps: mode 0 seems to work reliably on my current setup, big thanks for the hint ;)
last but not least, would you advise using external pullups when running off 3.7V & controlling 3.7V-powered leds ( without opendrain since no more needed ? I wonder how to fasten the said "voltage swing" .. )
-> I'll see if I can adapt some "rainbow scrolleré onto those as a test ;p