Author Topic: Yet another resistance decade box (Read 109736 times)

bitseeker · « **Reply #100 on:** June 26, 2016, 07:14:07 am »

PeterZ posted two layouts, 1206 and 0804. I'm not sure which size Fortran used for the group buy.

Note that 0402 is 1mm long, rather than 0.1mm. The ones for this kit will be 2-3x larger than that. You should be fine, but you may want to do some practice on a junk board first.

I'm not sure what "normal" is. I see the imperial units used more often in discussion. Datasheets often list both, such as the Vishay one for the resistors Fortran ordered. http://www.vishay.com/docs/20035/dcrcwe3.pdf

Fortran mentioned that he might be able to presolder a small quantity of boards. I'm not sure if that's by hand or if he has a reflow oven to do them in bulk. Depending on the price difference, I might be interested in that option.

PeterZ · « **Reply #101 on:** June 26, 2016, 07:53:19 am »

All gerbers i posted in the final version on github are for 1206.

Macbeth · « **Reply #102 on:** June 26, 2016, 11:58:03 am »

Something else to be said about beginner soldering SMD resistors - they are much more prone to change their value if not soldered quickly and cleanly. Through hole are more forgiving. When you have carefully selected binned resistors to get spot on indexing it can be quite depressing to find it all over the place after soldering!

Fortran · « **Reply #103 on:** June 26, 2016, 04:17:53 pm »

Quote from: bitseeker on June 26, 2016, 04:00:05 am

+ 54x 1%, 1/4 Watt SMD resistors

I ordered 10 sets of 0.1% resistors as well, since a few people wanted that.

Quote from: bitseeker on June 26, 2016, 07:14:07 am

Fortran mentioned that he might be able to presolder a small quantity of boards. I'm not sure if that's by hand or if he has a reflow oven to do them in bulk. Depending on the price difference, I might be interested in that option.

Yes I will hand solder a few sets for those who aren't able to solder themselves.
I wasn't planning on charging anything for it if the "aren't able to" criteria is met.
Pleas of lazyness aren't good enough, and will go unheeded!

bitseeker · « **Reply #104 on:** June 26, 2016, 09:17:44 pm »

No worries. For me, it's simply the age-old trade-off of time vs. cost. Since that scenario no longer applies here, there's nothing to have to decide. Easy.

Hmm, an electronics forum with no smiley that's soldering.

ez24 · « **Reply #105 on:** June 26, 2016, 10:03:26 pm »

Quote from: bitseeker on June 26, 2016, 07:14:07 am

Note that 0402 is 1mm long, rather than 0.1mm. The ones for this kit will be 2-3x larger than that.

https://en.wikipedia.org/wiki/Surface-mount_technology

I read the chart wrong. 0.1 mm was just a comparison size whew

So 1206 is 3.2 mm x 1.6 mm Still small for me

FYI from above article

Quote

Problematically, some manufacturers are developing metric 0201 components with dimensions of 0.25 mm × 0.125 mm

Boy this is small wonder if anyone here could solder these ?

bitseeker · « **Reply #106 on:** June 26, 2016, 10:11:10 pm »

Woah, metric 0201.

"You're ordering another 1000 SMD resistors? Didn't you just get some yesterday?"

"I sneezed."

Macbeth · « **Reply #107 on:** June 27, 2016, 01:19:34 am »

Better than inhaling them I imagine!

bitseeker · « **Reply #108 on:** June 27, 2016, 02:59:20 am »

Oh my! There a joke in there somewhere.

Fortran · « **Reply #109 on:** July 05, 2016, 08:04:51 pm »

Update:

Resistors have arrived and I've cut them into strips already.
The boards are in Finland so they should arrive within a day or two.

I'll start shipping out this week. Just need to know the final numbers on everything.

Shouldn't differ much from what I've calculated.

Fortran · « **Reply #110 on:** July 07, 2016, 06:30:57 pm »

Everything have arrived and I'm ready to ship

I've been forced to adjust the price slightly, but I'm hoping everyone is ok with the final numbers.

6 PCB's = 1.50 USD
1% resistors for 6 boards = ~~1 USD 2 USD~~ ** Out of stock **
0.1% resistors for 6 boards = ~~14 USD~~ ** Out of stock **
Shipping worldwide = 3 USD (good for about 6 kits)

So a kit with 6 boards, 1% resistors and shipping is ~~6.50 USD~~ ** Out of stock **
A kit with 6 boards, 0.1% resistors and shipping is ~~18.50 USD~~ ** Out of stock **

Edit: All gone. Removed payment details.

Dave · « **Reply #111 on:** July 07, 2016, 07:33:05 pm »

Payment sent for 1 kit w/ resistors. Thanks again for putting these kits together.

bitseeker · « **Reply #112 on:** July 07, 2016, 09:39:55 pm »

Payment sent for 2 kits. PMed you with the details.

cucumbers · « **Reply #113 on:** July 07, 2016, 10:30:31 pm »

Quote from: Fortran on July 07, 2016, 06:30:57 pm

Everything have arrived and I'm ready to ship
I've been forced to adjust the price slightly, but I'm hoping everyone is ok with the final numbers.

6 PCB's = 1.50 USD
1% resistors for 6 boards = 1 USD
0.1% resistors for 6 boards = 14 USD
Shipping worldwide = 3 USD (good for about 6 kits)

So a kit with 6 boards, 1% resistors and shipping is 5.50 USD
A kit with 6 boards, 0.1% resistors and shipping is 18.50 USD
Simply add up the stuff you want and send that sum via PayPal to dldm04@gmail.com, along with your list and address.

If anything is unclear, let me know.

Sorry for the silly question, but I've never used paypal to send money directly before. Do I choose the "send money to friends" option, or the "pay for goods and services" option?

Macbeth · « **Reply #114 on:** July 07, 2016, 10:43:10 pm »

In this case I would pick friends. I mean we are all friends here, right? Unless you feel charitable towards paypal at Fortrans expense of course. I'm sure he has costed the commission scenario in?

ebclr · « **Reply #115 on:** July 07, 2016, 11:35:05 pm »

http://g02.a.alicdn.com/kf/UT8xdWIXmVaXXagOFbXj/110716670/UT8xdWIXmVaXXagOFbXj.jpg

Back2Volts · « **Reply #116 on:** July 08, 2016, 02:46:15 am »

Payment sent for 2 kits. Thanks again for putting these kits together

Tony (PM sent also)

JohnPen · « **Reply #117 on:** July 08, 2016, 07:43:30 am »

Fortran. Payment sent for 1 off 1% Kit via PayPal.

Many Thanks for all your efforts.

John

TheAmmoniacal · « **Reply #118 on:** July 08, 2016, 08:24:38 am »

Quote from: Fortran on July 07, 2016, 06:30:57 pm

A kit with 6 boards, 0.1% resistors and shipping is 18.50 USD
Simply add up the stuff you want and send that sum via PayPal to dldm04@gmail.com, along with your list and address.

If anything is unclear, let me know.

Payment sent! I sent it as a personal payment as to avoid any fees on your side.

Fortran · « **Reply #119 on:** July 08, 2016, 09:44:39 am »

First orders have been sent and hopefully everyone has been notified.

If not, let me know

TheAmmoniacal · « **Reply #120 on:** July 08, 2016, 10:45:34 am »

No idea what I just paid for, will be fun anyway I guess

all_repair · « **Reply #121 on:** July 08, 2016, 10:52:15 am »

Just paid fot 6 pcb set, 1x 0.1% resistor set, 4x1% resistor set, 1xship.
Thank you.

Fortran · « **Reply #122 on:** July 11, 2016, 10:43:53 am »

Update:
Only 3 of the 0.1% kits remaining.

I've got about 20 of the 1% kits left, and about half a kilo of boards

I'm in no danger of running out of boards..

garnix · « **Reply #123 on:** July 11, 2016, 11:06:50 am »

While I'm waiting for the board&resistors to arrive I'm looking at AliExpress for the remaining needed components (KM2 switches, enclosure-box, banana-socket).

While I settled for this switch http://www.aliexpress.com/item/Black-18mm-x-6mm-0-9-Digits-BCD-Code-Pushwheel-Thumbwheel-Switches-KM2/1804257049.html I'm still undecided for the enclosure as I don't exactly know the height of the switch+PCB board - I would like the enclosure to be as small as possible.

Has anybody measured the required height? The plain-vanilla switch (according to AliExpress) seems to be 28 mm, but I guess approx. 2-3 mm of it will stick out of the encasing (pushbuttons, frame), so the case needs a minimal "inside" height of approx. 25 mm?

Alex Nikitin · « **Reply #124 on:** July 11, 2016, 11:15:41 am »

Just paid for 2x 6 pcbs only.
Thank you.

Cheers

Alex


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Author Topic: Yet another resistance decade box (Read 109736 times)

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