I wish to make a USB -> RS232 TTL serial adaptor.  It plugs into the USB port, and provides 4 wires out - +5V, GND, and TX/RX at
0V/5V TTL levels.  All I'm interested in is the hardware.

The hardware will look very simple - a USB plug on one end, and a 4-pin plug on the other.

In your experience, could you recommended an appropriate USB <-> serial chip?  Maybe something off the shelf?  The main thing is, it
needs TTL RS232 out, and a +5V power supply as well, to power the target circuit.  90mA maximum load.  I dont mind programming in
C++ to interface to it.

I dont need a PIC16C765 - I wish to interface to a smaller product that uses a PIC12C672, via a PC computer, without having the
adaptor built into the target circuit.

Regards,
Shane.

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