Yeah I saw MAX323 variants. I propably end up using them. But one question remains. I said I am powering the TelosB with batteries that are normally sitting on 2.8 Volts.
Is it ok if I use a 3.3 volts regulator in my circuit and connect TelosB battery pins to this 3.3V? Is 3.3 too much for TelosB (propably not for MSP430 itself but I am not sure about otherchips on the mote). Thanks. ----- Original Message ----- From: André Rodrigues Sent: 12/06/12 09:27 PM To: Eric Decker, Sean Dekker Subject: Re: [Tinyos-help] TelosB TTL voltage levels of UART0 Why not use MAX3232 or similar? Regards, André ----- Original Message ----- *From:* [email protected] *To:* [email protected] *Cc:* [email protected] *Sent:* Thursday, December 06, 2012 7:11 PM *Subject:* Re: [Tinyos-help] TelosB TTL voltage levels of UART0 you probably want to use conversion h/w that understands 3.3 V. It is what I use. On Thu, Dec 6, 2012 at 5:09 AM, Sean Dekker < [email protected] > wrote: Hi all, I could succesfully write an app for using UART0. The app compiles and uploads just fine. But I have a slight proplem or misunderstanding that hope you can point me to the right direction: I am running the TelosB on batteries. It provides around 2.8 ~ 2.9 volts. I want to connect the UART0 (from 10 pin IDC header) to MAX232N and read/write to a PC. MAX232N Expects +5 volt in idle state, and I think anything over 3.7 volt is counted as a high (or low) byte. My question is, is this the default TTL levels of TelosB (or MSP430). Is there any of the shelf component that can help reaching CMOS level using the 2.8 volt of batteries? Regards, Sean. _______________________________________________ Tinyos-help mailing list [email protected] https://www.millennium.berkeley.edu/cgi-bin/mailman/listinfo/tinyos-help -- Eric B. Decker Senior (over 50 :-) Researcher ----------------------------------------------------------------- _______________________________________________ Tinyos-help mailing list [email protected] https://www.millennium.berkeley.edu/cgi-bin/mailman/listinfo/tinyos-help
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