do i need max3232 for gps EB-85A?

do i need max3232 for gps EB-85A?#29370

By cmcnall - Thu May 03, 2007 9:45 am

- Thu May 03, 2007 9:45 am #29370

SO i bought a EB-85a and i hooked it up directly to my serial port on 5v. and i get nothing. I don't receive errors when i open the software, but i also don't receive data. running hyper terminal gives me some weired sets of characters every 5 seconds or so. Anyone know if this is becasue i don't have a serial buffer. do i need to have the max232 chip for the 3v logic? or should me serial port be able to read it directly as it is?
Thank you anyone who can help!
-chuck

#29375

By busonerd - Thu May 03, 2007 10:17 am

- Thu May 03, 2007 10:17 am #29375

You DEFINITELY need a max3232 for line level shifting.

You may have burnt out your EB-85A :/, as the RX pin doesn't like the -9/+9V on the serial port.

Cheers,
--David Carne

#29383

By cmcnall - Thu May 03, 2007 11:15 am

- Thu May 03, 2007 11:15 am #29383

i did not just hear that! "lalalalalala"
heres hoping for the best!

#41908

By septer012 - Thu Jan 31, 2008 1:55 pm

- Thu Jan 31, 2008 1:55 pm #41908

busonerd wrote:You DEFINITELY need a max3232 for line level shifting.

You may have burnt out your EB-85A :/, as the RX pin doesn't like the -9/+9V on the serial port.

Cheers,
--David Carne

the TTL on the eb-85a is 3.3v and 5v

I was under the impression the RS232c was up at +- 12V?

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