Craig Moates MAX233 circuit help??
04-27-2002, 04:00 AM
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Craig Moates MAX233 circuit help??
Well first off I will say I am no electrical wizard, but I can follow simple directions and solder good. I have a few MAX233 IC's laying around and I would like to make the interface showed on C.Moates page. I do have a few questions though. They may be stupid and simple but please help me out
1. What is VCC - I am assuming it is the 12 volt power source, or the 9 volt battery
2. I also highlighted an area of the schematic that I don't full understand. I thought the main difference between the MAX232 & MAX233 was just the pump capacitors. Why then does the MAX233 interface have the extra thing hooker to the laptop serial DB-9 at pin 4?? The MAX232 has nothing at pin 4. What does DTR stand for??
If someone could clear this up for me it would really help.
Thanks
1. What is VCC - I am assuming it is the 12 volt power source, or the 9 volt battery
2. I also highlighted an area of the schematic that I don't full understand. I thought the main difference between the MAX232 & MAX233 was just the pump capacitors. Why then does the MAX233 interface have the extra thing hooker to the laptop serial DB-9 at pin 4?? The MAX232 has nothing at pin 4. What does DTR stand for??
If someone could clear this up for me it would really help.
Thanks
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