Comments on: MAX232 Serial level converter

By: vamshi

vamshi — Fri, 01 Jul 2011 14:34:36 +0000

really help fulll topic
iam working on RFID security system nd
i cant get the o/p so
i thnk i may get the o/p by converting rs 232 to TTL logic
nd dis is also called interfacing circuit ryt…

By: Nuwan

Nuwan — Tue, 28 Jun 2011 03:50:09 +0000

Hi,
According to your schematic I made the circuit but now problem of detecting the hardware by the PC as I’m using Win 7 , is there any driver for this or any driver which is compatible with this circuit?
Thanks

By: Ismail Saeed Kamal

Ismail Saeed Kamal — Sat, 07 May 2011 09:34:25 +0000

Hi sodoityourself.com
thanks for your great post about max232 but what i want to ask it that i am working on the fingerprint based attendance system with atmega32 microcont and fingerprint module sm630 or similar one. Now i want to put max232 between finger print module and atmega32 now where would be the pin of max232 that should act as the input of max32 which is the output of finger print module please tell me this in short or send me on my email
ismailkamal2009@gmail.com
thanks

By: nibash sahu

nibash sahu — Wed, 27 Apr 2011 19:50:48 +0000

i used a max 232 chip in rfid based attendance resister ,but i dont know about function and use of max 232 .so pls send me a report on max 232

By: lekh

lekh — Fri, 08 Apr 2011 05:06:45 +0000

hey i have built this rs232 circuit with max232 ic and connected it with 89c51 but the output is notcomming so can somebody help what is the problem and also can v use 10microfarad capacitor instead of 1 microfarad

By: Mehdi

Mehdi — Sat, 26 Feb 2011 23:31:53 +0000

Special thanks

By: venkatesh

venkatesh — Sat, 26 Feb 2011 05:06:05 +0000

@Ozymandias:
if u cant see any thing in hyperterminal window
then the mistake can be 1) you might have the max232 pins 2,3 to max232 inputs in the opposite manner
2)check the supply,whether it is +5v to the ic
not many special reasons for it not to work
-regards
VENKATESH

By: venkatesh

venkatesh — Sat, 26 Feb 2011 04:53:56 +0000

@loffe:
here the 10uf capacitor is used to remove unwanted ripple
its absolutely not needed!!!!!!!!!
-regards
VENKATESH

By: Venkatesh

Venkatesh — Sat, 26 Feb 2011 04:35:40 +0000

@priyanka: here capacitors as dc level shifters,they clamp the voltage level. This is much required,bcoz the dc level must be clamped in order to send back the rs232 level back to serial port.

By: tala amit b.

tala amit b. — Fri, 18 Feb 2011 08:26:32 +0000

plz gie prize of max 232.