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Thread: Teensy 3.6 and APA 102 LED strips HELP!

  1. #1
    Junior Member
    Join Date
    Mar 2019
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    Teensy 3.6 and APA 102 LED strips HELP!

    Do I need to use a level shifter to run Apa 102 led strips from the Teensy 3.6?

    I am only able to get one led to turn on with the Teensy right now.

    Code works just fine when I use my Arduino but I have a 5 volt output on the Arduino...

  2. #2
    Senior Member+ Theremingenieur's Avatar
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    Feb 2014
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    Colmar, France
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    What does the data sheet of your LED strip say, which logic voltage is required? If it’s 5V, the answer is clear: You need a level shifter of the 74HCT125 or 74HCT245 type. Simpler (and cheaper) level shifters with only one mosfet Transistor and a resistor have a too slow slew rate (switching speed) which causes timing problems.

  3. #3
    Junior Member
    Join Date
    Mar 2019
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    9
    Thanks for the tips!

    I ordered the 74HTC245N and the BOB-12009. I will see which one works.

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