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paulbloggs · 02-27-2014, 10:45 AM

After my request the other day it seems there is nobody in Johannesburg that can help me with a cable.

I have the calculators.
I have the parts and the skills to make a cable. Is there a schematic of an RS232 to calculator cable? All my PCs have RS232. Is there a schematic of any cable?

The other problem is the overlays - does this eric rechlin guy exist? I have sent him many mails asking if he will post to South Africa. Not a single reply. So either it all disappears as spam or he is ignoring me.

Thanks
Paul

John Smitherman · 02-27-2014, 12:09 PM

Here's a link to Eric's 34s site which includes the overlays: http://commerce.hpcalc.org/34s.php

John

paulbloggs · 02-27-2014, 12:32 PM

(02-27-2014 12:09 PM)John Smitherman Wrote: Here's a link to Eric's 34s site which includes the overlays: http://commerce.hpcalc.org/34s.php

John

John,

That is where I have been send all the emails. But I don't get any replies.

walter b · 02-27-2014, 01:44 PM

(02-27-2014 10:45 AM)paulbloggs Wrote: The other problem is the overlays - does this eric rechlin guy exist? I have sent him many mails asking if he will post to South Africa. Not a single reply. So either it all disappears as spam or he is ignoring me.

Please use this address for ordering overlays (as stated in the manual): http://commerce.hpcalc.org/overlay.php. Eric ships worldwide, no need for asking.

d:-)

paulbloggs · 02-27-2014, 02:10 PM

(02-27-2014 01:44 PM)walter b Wrote:
(02-27-2014 10:45 AM)paulbloggs Wrote: The other problem is the overlays - does this eric rechlin guy exist? I have sent him many mails asking if he will post to South Africa. Not a single reply. So either it all disappears as spam or he is ignoring me.

Please use this address for ordering overlays (as stated in the manual): http://commerce.hpcalc.org/overlay.php. Eric ships worldwide, no need for asking.

d:-)

Walter,

I am sure he does but I would like a reply from him first. USD5 is a lot of money down here with current exchange rate. And I would like a couple or three.

The cable guy sent me cables almost 2 years ago but still nothing has arrived.

Dave Frederickson · (This post was last modified: 02-27-2014 05:17 PM by Dave Frederickson.)

(02-27-2014 10:45 AM)paulbloggs Wrote: Is there a schematic of any cable?

Hi Paul,

Just so we don't go down the path others have gotten lost on, the cable is really an adapter. Your computer outputs RS-232 level signals while the calculator accepts 3-volt logic level signals, so all cables incorporate a transceiver. Details can be found here and in the WP 34S manual.

Dave

dewster · 02-27-2014, 08:03 PM

(02-27-2014 10:45 AM)paulbloggs Wrote: I have the parts and the skills to make a cable. Is there a schematic of an RS232 to calculator cable? All my PCs have RS232. Is there a schematic of any cable?

My recommendation is forget adapting RS232 to logic levels and just buy a logic level USB serial cable for $4:

http://www.thereminworld.com/Forums/T/29...b-to-wp34s

paulbloggs · 02-28-2014, 07:51 AM

Thanks for the advice on the cables - that is what I was looking for. I have some max3232 convertors so that is not a problem. Those usb/programming cables are not easy to come by down here. I ordered some meters from deal extreme in october last year - they arrived last week. Our postal service is atrocious and lots of stuff gets stolen.

But I really need the overlays otherwise this will be pretty pointless.

walter b · 02-28-2014, 08:24 AM

(02-28-2014 07:51 AM)paulbloggs Wrote: But I really need the overlays otherwise this will be pretty pointless.

For the time being, please look at the pdf manual, page 151, in that matter.

HTH

d:-)

Dave Frederickson · (This post was last modified: 02-28-2014 06:50 PM by Dave Frederickson.)

Hi Paul,

(02-28-2014 07:51 AM)paulbloggs Wrote: I have some max3232 convertors so that is not a problem.

Perfect!

Quote:Our postal service is atrocious and lots of stuff gets stolen.

I can see that just getting parts can be frustrating. If you want to make a plug and need the parts I can try mailing them to you.

Dave

paulbloggs · 03-03-2014, 07:34 AM

Thanks Dave.
Where are you located?

I think the only thing I really need are the overlays and the original 30B software so that I may convert the calculator back to its original state if need be. My wife is an accountant and the financial side is good for her.

Is it possible to extract the original software before installing the WP34 software?

paulbloggs · 03-03-2014, 07:35 AM

Dave

I see you are in San Diego so the chances of anything arriving are hopeless!!
Thanks for the offer.

walter b · 03-03-2014, 07:48 AM

(03-03-2014 07:34 AM)paulbloggs Wrote: I think the only thing I really need are the overlays and the original 30B software so that I may convert the calculator back to its original state if need be. My wife is an accountant and the financial side is good for her.

Is it possible to extract the original software before installing the WP34 software?

IIRC, the original HP-30b SW is even on our project site on sourceforge. I'll check later. And for the overlays, please see my earlier response.

d:-)

paulbloggs · 03-03-2014, 11:32 AM

Walter,

Yes I saw your message and I looked at the book. That will work.
I would appreciate it if you can find the original 30b code and let me have the link. Just in case.
Paul

paulbloggs · 03-03-2014, 11:34 AM

I cannot believe there is nobody in Johannesburg or even South Africa that has done this before?
Really?