sergiidumyk
Member
Greetings! I've read at Adafruit website that NeoPixels powered by 5v require a 5V data signal, so I decided to try 74HCT245 chip, as they suggest. I connected it, checked that it indeed convert Teensy's 3.3V out to 5V, then connected pin 2 (I'm testing with OctoWS2811's BasicTest for now) to 74HCT245's A1 input, attached 100 Ohm resistor to B1 output and then to DI input of 2812B.
What's even more strange is that flickering is intermittent. Sometimes it disappears, sometimes returns.
When I connect 2812B directly to pin 2, everything works as expected.
I'm using Teensy 3.2.
I know, it would be easier to just purchase OctoWS2811 adaptor, but since I'm in Ukraine I don't want to wait, cause I need to show some prototype to my customer soon.
Why I decided to deal with 74HCT245? Because I wanted to test how many pixels would work from one Teensy's pin. 340 did work, but 350 started to flicker, so I decided to apply all the suggestions from here https://learn.adafruit.com/adafruit-neopixel-uberguide/best-practices
Here is video https://www.youtube.com/watch?v=DDyCrL67RKU
Any clues? Thanks so much!
What's even more strange is that flickering is intermittent. Sometimes it disappears, sometimes returns.
When I connect 2812B directly to pin 2, everything works as expected.
I'm using Teensy 3.2.
I know, it would be easier to just purchase OctoWS2811 adaptor, but since I'm in Ukraine I don't want to wait, cause I need to show some prototype to my customer soon.
Why I decided to deal with 74HCT245? Because I wanted to test how many pixels would work from one Teensy's pin. 340 did work, but 350 started to flicker, so I decided to apply all the suggestions from here https://learn.adafruit.com/adafruit-neopixel-uberguide/best-practices
Here is video https://www.youtube.com/watch?v=DDyCrL67RKU
Any clues? Thanks so much!