Serial cable for WP-34S : few questions

[Francois Lanciault]

(02-08-2015 06:19 PM)Francois Lanciault Wrote:  

(02-08-2015 05:20 PM)Marcus von Cube Wrote:  Also confirmed! Be aware that the voltage level is 0-3V, not RSR232 level! The latter can kill your calculator. An FTDI USB converter chip will do nicely.

Thank you for this information! I was just about to plug everything directly to the RS-232 port of an old PC. So I guess the "official cable" was doing the conversion from +/- 12V to the 0-3V required.

I think I have a converter from RS-232 to TTL level. Does 0-5V would do or it really needs to be 0-3V max ?

François

I think it is going to be ok. I have this converter:

https://www.sparkfun.com/products/8780

And I can decide what voltage it will output so I will use 3V volts.

Thanks again.

François