RS232- USB schematic?

hippy

hippy

Ex-Staff (retired)
Not sure how you mean by "no programming required". The AXE027.PDF contains a circuit diagram of what's inside it.
 
D

Dippy

Moderator
Do you mean a circuit which is USB one end and RS232 t'other. And requires no drivers or setting up?
i.e. solder it and stick it in?
FT stuff not good enough?
 
W

westaust55

Moderator
Suggest that you try and explain more clear what you are trying to connect together and what you are trying to achieve.

Is it single or bi-direction communications?

What volatge levels are intended?

By "no programming is required" do you mean no programming of a controller withint the RS232 to USB adapter.
 
S

santacruzbob

New Member
your best bet is getting one of the pl2303 cables on ebay for $5 shipped. RS232 works on a +/- 3-15v signal where less than -3v is a logical 1, and more than 3v is a logical 0. USB is NRZI encoded and uses 3.3v on the D+ and D- lines. the D+/D- are differential except for occasional key frames and I think every 6 bits of 0 a level change is forced. it's not as simple as "connect pin 4 to pin 3"
 
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