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'[PICLIST] USB<->RS232 TTL serial adaptor : USB in,'
2001\07\02@194656 by shane

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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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2001\07\02@224107 by shane

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Hi,

Thanks for the info (below), but ...

The target circuit needs TTL RS232, +5V/0V, and there isnt room for a max232 chip in the target circuit, to convert the rs232 back
into TTL levels.  It also needs a 5V power supply to power the target circuit.  Additionally, it needs our own 4-pin plug coming out
of the unit to connect to the target circuit.

Any more ideas?  It would be possible to build out own - anybody know of any USB -> RS232 TTL chipsets out there?

Cheers,
Shane.

> {Original Message removed}

2001\07\02@233141 by Marc Reinig

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Check

http://www.ftdichip.com/

Add a boost converter if you need to convert Vusb to 5V.

Marc Reinig
System Solutions



{Original Message removed}

2001\07\03@133437 by Harold M Hallikainen

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       See the  ft8U232 - USB Uart  at http://www.ftdi.co.uk/ft232r08.pdf

Harold


On Tue, 3 Jul 2001 11:36:20 +1200 Shane Tolmie <spam_OUTshaneTakeThisOuTspamKEYGHOST.COM>
writes:
{Quote hidden}

FCC Rules Online at http://hallikainen.com/FccRules
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