On Tue, Nov 19, 2013 at 3:41 PM, mike.valk@gmail.com mike.valk@gmail.com wrote:
2013/11/19 luke.leighton luke.leighton@gmail.com
On Tue, Nov 19, 2013 at 12:50 PM, mike.valk@gmail.com mike.valk@gmail.com wrote:
2013/11/16 luke.leighton luke.leighton@gmail.com
On Sat, Nov 16, 2013 at 8:22 PM, Henrik Nordström henrik@henriknordstrom.net wrote:
lör 2013-11-16 klockan 13:23 +0000 skrev luke.leighton:
https://www.sparkfun.com/tutorials/215
in the end i went with this for the router, using an IMD2A for the two transistors.
Personally I haven't used RS232 in ages, only different "TTL" serial variants of 5V or 3.3V.
yehh i have to be reaasonably compatible with RS232, as this is actually going to have a 9-pin header on it. although the only thing it will be connected to in most cases is one of those... yup, USB serial converters.
Why don't we include a USB to TTL-Serial chip on the card and/or carrier.
USB-to-TTL.... ah, because that would take out one of the 4 USB ports. in this "product" there's only 1 4-port hub.
No, not on the hub. As as separate usb "slave" port.
ok so free-standing effectively. so the BOM comparison would be a USB port (slave. B is it? like those you find on printers) plus USB-to-serial converter IC vs a-bit-of-logic plus an RS232 DB9. and it would save a hell of a lot of board space - DB9s are big.
hmm... it has merit.
l.