Programming cable for hp-30b -> wp-34s Open letter to Gene



#39

Sorry for the public announcement of my needs, but the system wont let me send an email to Gene until I've posted a few messages to the forum.

So, an open letter to Gene:

Greetings Gene,
on the wp-32s quick start guide, under "Find a programming cable to buy, beg or borrow" it says to politely ask you, and that you may be able to get me one.

Does this mean I can buy, beg or borrow one from you? If I can buy, how much, and do you accept paypal? If I need to beg, please visualise me with a suitably earnest expression. If borrow, ok, but it's a long way to Australia.

Or can you direct me to another source? The calculator store at http://www.thecalculatorstore.com says "do not have additional flashing cables to sell".

I already have an un-needed 30b that I can flash, so I don't want to buy the package from them.

Thanks,
Nigel


#40

I too am Desperately Seeking Gene. He, the lord of the much-sought after WP-34s flashing cables.

Gene: Emailed you last week, using the "mail that is hot" address from a previous post, but heard nothing. Have you gone fishin'? Or did I botch the decoding of said address? Maybe I used one's complement instead of 2... :-)

--Peter

Edited: 30 July 2012, 8:21 p.m.

#41

I am happy to program your unit for you. I'm in Tassie.
I'll do it free of charge. You pay the postage both ways.
Cheers
A


#42

I'm willing to program a few units under the same terms. I'm in Brisbane.

How many units I'll do for folks depends on how many want them how quickly.


- Pauli


#43

Quote:
I'm willing to program a few units under the same terms. I'm in Brisbane.

- Pauli


And I am in Sydney, same as above

cheers

#44

Hi,

I have sent an email to Gene too to alert him of your attempts to contact him. He does sometimes have problems with his emails.,

If anyone in the UK requires flashing of a 20B or 30B (free, you only need to pay postage), you can email me: bart_at_barend_dot_plus_dot_com (replace "at" and "dot" with relevant characters and remove all the _ ).

Regards

Edit:
I forgot to mention, Harald has made an adaptor that mounts in the 30B and uses a micro USB interface (so there is no need for a serial port or a USB-serial adaptor as is required for the HP cable). See here: WP 34S flash adaptors now available (his email is visible on the boards - clearest on the last picture of the first post).


Edited: 31 July 2012, 7:54 a.m.


#45

Quote:
... Harald has made an adaptor that mounts in the 30B and uses a micro USB interface (so there is no need for a serial port or a USB-serial adaptor as is required for the HP cable). See here: WP 34S flash adaptors now available ...

Please see the first footnote on p.135 of
the manual for more, including another link :-)

#46

... if all else fails read the manual ;-)


#47

Some people say you an even save some failures by early reading. Perhaps worth a try? ;-)


#48

Quote:
Some people say you an even save some failures by early reading. Perhaps worth a try? ;-)

Avoiding mistakes is generaly much overrated. Takes all the fun out of engineering ;)


#49

Quote:


Avoiding mistakes is generaly much overrated. Takes all the fun out of engineering ;)


Think of the fun of Chernobyl, for example [;-)

#50

That wasn't a mistake though, just an experiment with an unexpected outcome ;)

Edit: I should point out that this is intended as being humorous - befor things get out of hand again...


Edited: 1 Aug 2012, 8:04 a.m.

#51

Quote:


Avoiding mistakes is generaly much overrated. Takes all the fun out of engineering ;)


c.f. Sir John Harvey Jones quotation

#52

Nice quote! I was tempted to print it and put it on the wall at work :)

#53

I am in the same situation, no answer from Gene... Anyone from Canada that has a cable ??

Best regards !


#54

Most probably Neil Hamilton :-)


#55

Yup. I am in Ottawa. If you pay to get it here and back, I can certainly program it for you.

Cheers...

#56

I have a cable and could flash you calculator, I am located in Halifax.

#57

I am in the GTA, and could flash for you as well.


#58

My guess is that Gene is on vacation (=holiday). Given his long devotion to the community, I don't think he would run out of cables or move to the Cayman Islands without telling us. :-)

I would really rather use Gene's cable than start tearing into the calculator and installing boards. Especially since I have a legacy serial port available. So I'm hoping he resurfaces shortly. Failing that, is there a way to make our own cable with readily-available parts? Does the cable has electronics in it? Or is it just a matter of wiring up two connectors?

Or, I guess I'll have to beg someone here in the USA to flash the calculator for me.

--Peter


#59

Sorry all. Several causes for the delays..

1) Hotmail really does seem to simply not get some email. It does not go into a spam folder, it just doesn't arrive. Very odd.

2) I have been not only out of town, not only out of the country, but out of the continent, having spent mid-July in Malawi Africa. Back now, but it has been a busy few weeks.

3) And, sadly, the cables really are running out. I'm probably keeping the remaining 10 cables (wow, only 10 left) to hand out at the HHC conference.

I knew this day would be coming, but the days of *easily* making a WP 34S are about over.

It may be time to start directing people to buy a premade WP 34s from Eric Rechlin and his commerce site.

Walter, it would be beneficial to me if you could edit the WP 34s manual and remove my name. :-)

Sorry all.


#60

Yeah, yeah, "The dog ate my cables". We've heard that one before, Gene :o)

#61

Ouch.

I wish I'd known about this before I bought a 30b, ordered a couple of the vinyl overlays, and requested a cable from Gene (which may have gone into the bit bucket). Had I known then what I know today, I would have just ordered a pre-flashed calculator from Eric. :-(

Gene, if you're not going to send out any more cables, would it be possible for me to borrow one long enough to flash the 30b I've already bought? I'll pay postage both ways of course.

--Peter

#62

The cable does have some electronics in it, basically a level convertor to convert between TTL level and RS-232. The chip used is readily available as is the DB-9 the big problem is the 6 pin connector at the calculator end. This connector has 6 spring loaded pins called pogo pins that make contact with the pads on the board, and the shell of it has two plastic clips to hold it in place. It is likely possible to buy pogo pin connectors but I don't know where you could get them and it is likely that any that you get will not have the clips to hold it in place.


#63

Quote:
...and it is likely that any that you get will not have the clips to hold it in place.

That is exactly the problem. Pogo connectors are relatively easy to get, but the clips are the problem. And I don't think demand is high enough to have such connectors made.

#64

I have the electronics to make the cables. The connector is the tricky part. We haven't been able to find anything that fits so far.


#65

After my last post I looked to see what is available and ran across some that could be soldered into a piece of PCB they are made by sparkfun and are 33mm long and the tip has 6.5mm of travel and a 1.3mm tip the problem is it appears that the pads are not on a 0.1" grid they are slightly closer together but it is likely close enough that the pins could be angled ever so slightly to fit. As for the clip that hold the connector it occurs to me that a U shaped clip could be made that holds down the pins and hooks beside the holes for the pins, I think this could work.


#66

Manufacturing the clip sounds quite fiddly to me. I wouldn't really want to get into that. Might be worth thinking about as a DIY solution though.


#67

Yes the clip may be fiddly and yeah I am thinking of this more as a DIY solution, anyway I think I will get some of these pogo pins and see how it goes. It will probably take me about a week to get them and when I have something I will report back here with pictures.


#68

OK, let us know how you get on. If this works I will look at how I could modify the adaptor board I made to go into the original flash cable (to convert it from RS232 to USB and get rid of the power draining issue). The main change would be the two buttons. The current design is reusing the ones from the HP cable.

#69

Paul,

I think I found a way to make a molded plug that will fit well and be able to hold the pogo pins.

I took some Shapelock low temperature thermoplastic melting it in hot water and pressed it hard into the 6-pin connector socket on the back of the 30b. I waited for it to fully harden and pulled it out. It was a pretty tight pull and remained so for the next several insertion/extraction cycles I put it through. Aside from being a fit that I think will be more than tight enough to hold the tension from the pogo-pins the molding shows exactly where to drill the holes to insert the pogo pins and glue them in place.

I don't have any pogo pins here but I'll order some and give it a try, you might do the same for Shapelock (if you don't have any of it) and we can compare notes.

-Katie


#70

I have never heard of that product but it looks really useful I will have to get some, I can use it to make a mold for liquid casting resin, for this project and for others.

#71

Quote:
I looked to see what is available and ran across some that could be soldered into a piece of PCB they are made by sparkfun and are 33mm long and the tip has 6.5mm of travel and a 1.3mm tip

Adafruit also sells small quantities of pogo pins and they have an interesting tutorial on how they make jigs with pogo pins.

https://www.adafruit.com/products/394


#72

Thanks for the pointer, those look very similar to what I ordered, it would be easy if the pads on the 30b where on 0.1 inch centers but they are not. Near as I can tell they are 2mm centers. I ordered some of the shapelock that Katie mentioned above, but it will be at least a week of more before I get that. I am now thinking I will carve a wooden model of the connector shell to make a mold from.


#73

Making a mold sounds like a nice idea. I'm thinking more along the lines of a DIY tutorial for people to make their own cable when they have none. You'd still need to buy or build the electronics for it, but the schematic for this is already out there and Harald is selling completed PCB's for this, so that part is already done.

The 1mm diameter of the pogo pins reference above seems correct as does the 2.5 mm of spring travel. What's not correct is the 1.5mm contact head size, it's too wide. It should be around half that diameter ideally. I found these on ebay, still about 0.3 mm wider than the HP supplied cable but I think they should work ok, I'll keep you posted....


#74

The first ones I ordered have a 1.3mm head and I think they may fit but it may be a bit tight, I have also ordered some of these on ebay they are really tiny the outside diameter is only 0.49mm so they will fit for sure.

#75

Thanks for all the prompt responses (Paul, Neil and Svisvanatha), But I will wait a week or two for Gene to surface :)

If not, I will probably accept Neil's offer as I am in Quebec City and Ottawa is the nearest...

Best Regards !


#76

Sorry for my previous post as I had not seen Gene's answer...

I will probably try to modify my 30b to add a USB port (using Harald Pott's PCB if available)

Thanks again to all...


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