Flickering COB LED Strip

[dedehai]

you need clean wiring and use the correct levelshifter.

Levelshifter Analysis

I ran many tests on different level-shifters and setups to bring a bit more light into the topic. Here are the results: [image] All tests done with ESP32 C3, my custom controller uses a 74HCT2G17. The modified I2C levelshifter use an addtional pull-up resistor to 5V on the output and according to the datasheet is safe for ESP32 and ESP8266, even when using all four channels. The little additional board on the I2C shifter contains a resistor and a zener diode to drop the data level to 3.0V a…