Re: What chip was used on the DTMF Weeder Kit?

[nobody@xxxxxxxxxxxx (Dave Houston)]

If you went straight to the parallel port I doubt MH could handle it. You'd
need an interrupt.

Had you indicated up front that you wanted to do more than the Weeder kit
was capable of I would have suggested...

     http://electronickits.com/kit/complete/tele/ck602.htm


Jack Edin <nospam@xxxxxxxxxxxxxxxxxx> wrote:

>Dave Houston wrote:
>> The Weeder Telephone/Computer Interface kit (WTTCI-K) did use the MC145436
>> but it also used a PIC16C54 which decoded the DTMF and provided the
>> multidrop RS232 interface. Aside from the fact that supplying you with the
>> board layout and schematic would infringe Weeder's copyright it wouldn't do
>> you any good without having the firmware for the PIC. If you plan to write
>> your own PIC firmware, you may as well design the whole thing from the
>> ground up.
>
>As I said, I don't have the schematic. As such I really have no idea
>what went into his design...
>
>If he went directly to the PC's parallel port, with a little low-level
>software, he wouldn't need a PIC.
>
>> Unless you can find a surplus Weeder kit, it would be simpler to choose some
>> other DTMF decoder kit (there are many) and adapt the MH code as needed.
>
>Any leads on a surplus Weeder kit?
>
>> Check out the QK153 from Quality Kits.
>
>Dave, you did it again!
>
>I just bought 2 of these, as well as some other stuff (telephone surge
>suppressor, SLA battery charger, & 8 relay kit) and it has shipped!
>
>Looking forward to making this work.
>
>This kit will put a character out the serial port as it comes along on
>the DTMF (phone line.) No formatting whatsoever.
>
>And it doesn't terminate the line, either.
>
>So there doesn't seem to be an indication of off-hook status either...
>
>Mister House would have to time incoming data. After a period of
>inactivity, it'll have to terminate that entry to the log.
>
>It also can't time the call's duration. Or can it?
>
>Anybody else using the QK153 from Quality Kits with Mister House?
>
>Worst case it may be necessary to re-write the kit's firmware. They use
>an Atmel 89C2051. They don't provide or make available the source code.
>
>I wonder what the Weeder kit's protocol was... Anybody?
>
>Thankx, again.
>
>Jack
>:)