RS-232 to TTL cable with MAX232


Posted on Oct 21, 2012

Here is a diagram of the internals of the MAX232A. It shows a double charge pump voltage doubler and a +10v to -10v voltage inverter. The voltages output are used to generate the RS-232 compliant signals. The MAX232A has provisions for two serial ports on the same physical package. Most people only connect one of them. You can get a data sheet for the MAX232 and friends from Maxim.


RS-232 to TTL cable with MAX232
Click here to download the full size of the above Circuit.

There are two camps on how to implement serial ports on a robot. One says stick the MAX232 on the robot. The other says don't. I kind of like the don't category! Most of my robots are autonomous, so I don't really need the MAX232 onboard consuming power.




Leave Comment

characters left:

New Circuits

.

 


Popular Circuits

330 MHz prescaler for AVR frequency meter
CRT and Power Supply for Oscilloscope
Ac-solid-state-relays
Toy Motor Drivers
dmm fuse protector
and filter 1 3 5w power rf amplifier
PIC IR Decoders
Can effectively guarantee the auto-voltage starting circuit main contact of extinction



Top