Author Topic: Yet another resistance decade box  (Read 101221 times)

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Offline Fortran

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Re: Yet another resistance decade box
« Reply #150 on: July 12, 2016, 03:31:44 pm »
It should be.
Mine are also 18x6.  :)
Depending on how you measure of course.
 

Offline fanOfeeDIY

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Re: Yet another resistance decade box
« Reply #151 on: July 12, 2016, 04:04:54 pm »
If you send as "family or friends", you'll need to PM or email me your address.
I like friends.. they don't cost me anything in transfer :)


Thank you Fortran,
PM sent and finished PayPal.
 

Offline gblades

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Re: Yet another resistance decade box
« Reply #152 on: July 12, 2016, 04:47:18 pm »
Payment send and I added a note with my address details.

Would these switches work. They appear to be the correct size.
http://www.ebay.co.uk/itm/291552388297

Thanks
 

Offline TheAmmoniacal

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Re: Yet another resistance decade box
« Reply #153 on: July 12, 2016, 04:57:02 pm »
Payment send and I added a note with my address details.

Would these switches work. They appear to be the correct size.
http://www.ebay.co.uk/itm/291552388297

Thanks

Looks identical to me.
 

Offline TheAmmoniacal

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Re: Yet another resistance decade box
« Reply #154 on: July 12, 2016, 05:00:25 pm »
They will be sold individually. I've been counting a set as 6 boards though but you can buy whatever amount you want.

I bought these and they match:
http://www.ebay.com/itm/301726653090
 

Offline Fortran

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Re: Yet another resistance decade box
« Reply #155 on: July 12, 2016, 06:17:36 pm »
It's the correct one.


Now there's only 6 of the 1% kits left.
Orders that can't be sent will of course be refunded.

They sold out quicker then I expected :)
 

Offline Iwanushka

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Re: Yet another resistance decade box
« Reply #156 on: July 12, 2016, 07:09:51 pm »
How much for pcbs + 1% ( maybe you have 0,1% kits?) resistor kit and shipping in EU if I understood correctly I need 6 pcbs?
When all you've got is a hammer, everything starts looking like a nail.- Attrition.
 

Offline Fortran

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Re: Yet another resistance decade box
« Reply #157 on: July 12, 2016, 07:12:23 pm »
All the 0.1% kits are gone.

One 1% kit would be 5.50USD, including shipping.
 

Offline Iwanushka

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Re: Yet another resistance decade box
« Reply #158 on: July 12, 2016, 07:14:57 pm »
All the 0.1% kits are gone.

One 1% kit would be 5.50USD, including shipping.

Do you plan on ordering more 0.1% kits with pcbs? Works case I would grab 1% one
When all you've got is a hammer, everything starts looking like a nail.- Attrition.
 

Offline Fortran

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Re: Yet another resistance decade box
« Reply #159 on: July 12, 2016, 07:30:46 pm »
If there are enough people wanting them, sure.
A few more on the "0.1% waiting list" and I'll order some.
 

Offline Iwanushka

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Re: Yet another resistance decade box
« Reply #160 on: July 12, 2016, 07:32:36 pm »
If there are enough people wanting them, sure.
A few more on the "0.1% waiting list" and I'll order some.

Then please count me in for 2x sets (PCBs + 0.1% resistors)

Thank you!
When all you've got is a hammer, everything starts looking like a nail.- Attrition.
 

Offline Fortran

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Re: Yet another resistance decade box
« Reply #161 on: July 12, 2016, 07:39:55 pm »
Great  :-+
That makes 4 and I'm somewhat confident that the rest of them will sell as well.

I'll probably order next week. Want to see that the ones I've sent arrive as planned :)
 

Offline Iwanushka

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Re: Yet another resistance decade box
« Reply #162 on: July 12, 2016, 08:09:59 pm »
Great  :-+
That makes 4 and I'm somewhat confident that the rest of them will sell as well.

I'll probably order next week. Want to see that the ones I've sent arrive as planned :)

Cool, can you PM me when you make the order so I can pay upfornt (my memory is not that great these days)
When all you've got is a hammer, everything starts looking like a nail.- Attrition.
 

Offline Fortran

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Re: Yet another resistance decade box
« Reply #163 on: July 12, 2016, 08:22:39 pm »
Neither is mine, but I'll try :)
 

Offline ez24

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Re: Yet another resistance decade box
« Reply #164 on: July 12, 2016, 08:44:27 pm »
It should be.
Mine are also 18x6.  :)
Depending on how you measure of course.

What do you think of the 22x8 ones for future kits:

http://www.ebay.com/itm/Black-22mm-x-8mm-0-9-Digits-Decimal-Pushwheel-Thumbwheel-Switches-KM1-10-pcs-/261571657067?hash=item3ce6e2bd6b:g:CKcAAOSwdsFUN1Pi

Maybe easier to work on ?
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Offline bitseeker

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Re: Yet another resistance decade box
« Reply #165 on: July 12, 2016, 09:17:19 pm »
They sold out quicker then I expected :)

That's always a good thing. Thanks again for going to the trouble to make a bunch of these available as kits. :-+
TEA is the way. | TEA Time channel
 

Offline ebclr

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Offline ebclr

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Re: Yet another resistance decade box
« Reply #167 on: July 12, 2016, 11:50:42 pm »
Payment for 28 boards sent
 

Offline LeonV

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Re: 10 ppm 0.01%
« Reply #168 on: July 13, 2016, 12:15:54 am »
https://world.taobao.com/item/532210645700.htm?spm=a312a.7700714.0.0.XFEcUM#detail

Would the contacts from the cheap switches render such high precision useless? (I would have no idea, and don't have time to do the math right now)

Be interesting to see the precise values that a wheel would give with these.
Damn forum is making me procrastinate from work!
 

Offline ebclr

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Re: Yet another resistance decade box
« Reply #169 on: July 13, 2016, 02:33:13 am »
Of course this will only happen on low ohms, if your lowest step is 10 ohms, the contact effect will be extremely low
 

Offline iromero

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Re: Yet another resistance decade box
« Reply #170 on: July 13, 2016, 01:00:26 pm »
This is a great cheap project, i just ordered some boards and switches. I wonder what the tempco of the resistors in the kit is.
 

Offline Fortran

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Re: Yet another resistance decade box
« Reply #171 on: July 13, 2016, 01:11:26 pm »
It's ±100ppm/°C

CRCW1206
http://www.vishay.com/docs/20035/dcrcwe3.pdf

The 0.1% was much better.
Also much more expensive for some reason :)
 

Offline TheAmmoniacal

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Re: Yet another resistance decade box
« Reply #172 on: July 13, 2016, 02:14:41 pm »
It's ±100ppm/°C

CRCW1206
http://www.vishay.com/docs/20035/dcrcwe3.pdf

The 0.1% was much better.
Also much more expensive for some reason :)

Which 0.1% resistors did you use?
 

Offline Fortran

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Re: Yet another resistance decade box
« Reply #173 on: July 13, 2016, 02:29:04 pm »
A few different actually. The ones I linked in the beginning of the thread was out of stock. All have the same specs though.

±25ppm/°C
http://www.yageo.com/documents/recent/PYu-RT_1-to-0.05_RoHS_L_6.pdf
 

Offline Iwanushka

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Re: Yet another resistance decade box
« Reply #174 on: July 13, 2016, 06:28:26 pm »
A few different actually. The ones I linked in the beginning of the thread was out of stock. All have the same specs though.

±25ppm/°C
http://www.yageo.com/documents/recent/PYu-RT_1-to-0.05_RoHS_L_6.pdf

25ppm is quite good for this project, and switch resistance does not matter we can always use der ee 500 to check actual value,

I hope you will make new order soon :)
When all you've got is a hammer, everything starts looking like a nail.- Attrition.
 


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