I’ve asked my local vendors about the TTL to RS232 circuit with no success. I decided to look for a different way to convert Arduino’s TTL to RS232 signal. I’ve found some information on Severino’s schematic and this website: http://www.pablin.com.ar/electron/circuito/mc/ttl232/index.htm and I decided to create my own schematic. There are plenty of information about Maxim chip to do this, but in some places it’s very difficult to get some components, so I think this is the best and cheapest way to do the conversion.
I’ve never tested the attached schematic, I plan to do so, but It would be very nice if someone with appropiate knowladge verifies the circuit before the tests. It would be very nice to get some help to avoid crahsing my hardware.
Thank you so much.