Hi , I'm new to this forum and I need a little help with a circuit I'm trying to build on a breadboard. It's a RS232 serial level converter using the MAX232chip from Texas Instruments. I have the datasheet for MAX232 and it has a schematic in it showing it's Basic construction. The problem that I'm having is getting my PC serial port to "SEE the MAX232 circuit I built.
I'm suppling the circuit with 5v from a USB port, on my PC.
I'm trying to build a ALDL interface ,( Assembly Line Data Link ) using the
MAX232 . The ALDL uses TTL protocol to communicate. I'm trying to build this ALDL interface to Scan my automobile through my Laptop.
I have tried the LOOPBACK TEST, using Hyper Terminal, but no success.
I know that the serial port works, I can operate a Satellite Box and my telescope from the serial port.
I can't figure it out, I've built the circuit from scratch twice but no change.
Here is the data sheet link.
http://datasheets.maxim-ic.com/en/ds/MAX220-MAX249.pdf
Any help would be great
Sincerely Aliman
I'm suppling the circuit with 5v from a USB port, on my PC.
I'm trying to build a ALDL interface ,( Assembly Line Data Link ) using the
MAX232 . The ALDL uses TTL protocol to communicate. I'm trying to build this ALDL interface to Scan my automobile through my Laptop.
I have tried the LOOPBACK TEST, using Hyper Terminal, but no success.
I know that the serial port works, I can operate a Satellite Box and my telescope from the serial port.
I can't figure it out, I've built the circuit from scratch twice but no change.
Here is the data sheet link.
http://datasheets.maxim-ic.com/en/ds/MAX220-MAX249.pdf
Any help would be great
Sincerely Aliman