Author Topic: Stumped by slow MOSFET rise time (Read 7653 times)

Kerr · « **Reply #25 on:** July 25, 2017, 11:27:39 am »

as a note that led control says 6v minimum input

David_AVD · « **Reply #26 on:** July 25, 2017, 11:44:17 am »

WS28xx are 5V devices and require a 5V drive signal.

NivagSwerdna · « **Reply #27 on:** July 25, 2017, 03:39:14 pm »

As far as levels are concerned you only need to talk to the first LED....

There is a hack...

http://hackaday.com/2017/01/20/cheating-at-5v-ws2812-control-to-use-a-3-3v-data-line/

or for the level shifter... 2N7000? BSS138?

Oh.... and what danadak said.

int2str · « **Reply #28 on:** July 25, 2017, 10:13:09 pm »

Thanks David and MK14!
Spot on.

Changed the pull-up to 220Ohm and it does a nice square(-ish) wave at 800kHz.
Works great now.

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