| ??? 01/15/02 23:06 Read: times |
#18732 - RE: Circuit that replace MAX 232? D.C. |
If you go really cheap you can do it with a couple of transistors to invert the logic of the TTL. The levels still stay as TTL but the RS232 will function, the levels for 232 have a wide swing about +/-3V to +/-12V from memory so the 5V for TTL is in that range, but it is not nearly as reliable as the MAX232 but OK for short lengths and test runs
Marshall |



