Monthly Archives - May 2020

how to choose the best digital LEDs?

  LEDs come in lots of different shapes and sizes. For Analog digital LEDs, where the whole strip becomes a single color, choice is mostly about the size, wattage and density of the strip. For digital LEDs it’s also important to make sure you get the correct chip inside of the LED strip so that you can also control it. Using this chip a addressable LED strip can control each individual digital LED on the strip and give them all different [...]

The voltage drop of APA102 and HD107S

Below is one real tested for 144leds HD107S and 144LEDs APA102. You can see obviously voltage drop for APA102 after 30leds,  after 0.5m no signal and all leds turn red. for hd107s, only the end has a little voltage drop. also HD107S is brightness than apa102. 

HD107S 144LEDs compare APA102 144LEDs

Below is one real tested for 144leds HD107S and 144LEDs APA102. You can see obviously voltage drop for APA102 after 30leds,  after 0.5m no signal and all leds turn red. for hd107s, only the end has a little voltage drop. also HD107S is brightness than apa102.Let’s show the APA102 LED Strip testing, a Teensy 3.2 runs the FastLED “Cylon” example with this line:LEDS.addLeds<APA102,11,13,RGB,DATA_RATE_MHZ(24)>(leds,NUM_LEDS);NUM_LEDs was set to 160, and I connected a strip of 144.  The oscilloscope traces are the [...]