[sudo-discuss] arduino logic lever shifter 5v-3.3v for esp8266

[robb]

thx, got carried away by my ftdi rs-485 converter's arrival. so far, i can
dim rgb channels but the optima lighting 4 channel dimmer packs are a
different matter.
can't wait to try the dmx laser next

On Fri, Feb 5, 2016 at 1:10 PM, Jake <jake at spaz.org> wrote:

> @jake guess it's time to dig through the resistor box...i'm worried about
>> the 170Ω not being there though
>>
>
> you can use a single resistor instead (from 5V TX to 3.3V RX) but it
> should be bigger, like 10K if that works, but not less than 1K.
>
> hmm, chip-power-down (CH_PD) wants 10kΩ > vcc...i didn't know that.
>>
>
> if you see other diagrams where CH_PD connects directly to Vcc it is
> probably fine.
>
> also 10K is just a random number, anything from 1K to 100K would probably
> have the same effect.
>
> -jake
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