Go Down

Topic: serial data voltage divider (Read 384 times) previous topic - next topic

xerxis

Hi,

for my project I need to go from 5V arduino RX/TX to 3.3V RX/TX from a bluegiga module. A very common problem and one that I usually solve with a level shifter. However at the moment I don't have one lying around and I was wondering if I could use a simple voltage divider instead. It would probably work at low baudrates, but would it still work reliably at higer baudrates?

JoeN

Got Zener?

http://www.instructables.com/id/Level-Shifting-Between-TTL-and-CMOS/step4/Using-a-Zener-Diode/
I will never ask you to do anything that I wouldn't do myself.

xerxis

Hmmm, I probably have some leftovers, good idea (and if not they are easy to find). I don't need bidirectional anyway, I'm only planning on using UART.

Thanks for idea!

I guess it would lead to less noise than a simple voltage divider.

jtw11

I asked this question a few days ago here, take a look - I got some good info.

http://arduino.cc/forum/index.php/topic,136788.0.html

Go Up
 


Please enter a valid email to subscribe

Confirm your email address

We need to confirm your email address.
To complete the subscription, please click the link in the email we just sent you.

Thank you for subscribing!

Arduino
via Egeo 16
Torino, 10131
Italy