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Old 31st August 2011, 08:24 PM   #21
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I'll make sure to add a little something extra of course. Being a student it won't be much, but that makes it all the much sweeter, doesn't it ?


Now if you DO order parts from Farnell (mainly the cases, I guess...), what's the shipment policy from Farnell? How much do you have to order to get free postage?

If we do get that we would be a little more flexible in the ordering of parts. If Mouser is out of stock on something, we can order that part from Farnell. If Mousers price is significantly higher? We order that part from Farnell...

I don't know how much it would increase your efforts though, so just do what you think is right

And it certainly is a good thing that you take your time with this, ti's much appreciated. We want to get this right the first time

Last edited by lenconian; 31st August 2011 at 08:25 PM. Reason: Formatting issues
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Old 31st August 2011, 08:27 PM   #22
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@Jokener, Thanks again for doing this. That all sounds good! Don't under estimate the e-mails, paypal hassles, changes in orders, etc. There's a lot of "admin" work too.

As for the transformers, someone in Norway said it was 22 GB pounds just for shipping cost on the Farnell 230V transformer. And I've heard similar complaints from those in other countries.

Also, nothing in the O2 is very ESD sensitive except the MOSFETs. If you can find a source for a sheet of conductive foam you could just cut it up into suitable sized pieces and stuff the 4 NJM DIP8 ICs in it (to keep the pins from getting bent in shipping) and insert the MOSFETS sideways (laying flat) into one side of the foam. That would save some work and you wouldn't need any antistatic bags.

I've also seen just a printed sheet of paper with the values on it and you can just tape the various components next to their printed part number/value. That would work well for all the resistors, diodes, 0.022 uF, 1 uF and 220pf capacitors. Everything else is pretty obvious with easy to read part numbers, etc. and can be tossed in the same bag.
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Old 31st August 2011, 08:27 PM   #23
QRikard is offline QRikard  Sweden
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I'm interested in 2 kits.

All standard components.
15A pot (better for low volume)
Two small boxes B2-080BK (preferably black) I think it will look really good when the text becomes silver after engraving.
No machined front
No AC adapter (maybe one depending on price)
No batteries

I think it would be great if you could handle the enclosure GB as well because that should save shipping cost for everyone. Sure it takes a lot of time but thanks for at least considering it.

In case there is a GB for cases I would like to see your enclosure design but i'm leaning towards the standard one so far. I checked farnell (sweden) and they had a few hundred of the B2 enclosure in total and a few colors to choose from (black and silver i can remember).

Edit: Maybe all components doesn't need to be placed in separate bags. The opamps for example are really easy to see the difference between and the same with resistors and many other components. You could probably save quite a lot of time there and i think most of the people here will be able to sort it out them selves.

Edit 2: Transformer would be great because we swedes can't even order from farnell as a private person its restricted to companies only and the shipping is really expensive...

Last edited by QRikard; 31st August 2011 at 08:36 PM. Reason: Added the suggestion at the bottom
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Old 31st August 2011, 08:38 PM   #24
Jokener is offline Jokener  Germany
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@RocketScientist:
I know whats coming towards me, but thanks for the warning. I have was involved in organizing my teams motorsports competitions... who needs to go today, who tomorrow, who needs extra soft towels, bagels anybody?, maybe a Red Bull for breakfast? Two? Very well, sir... :-)
Farnell, Mouser and the other large vendors only charge that much for small quantities.
1kg in an envelope within the EU is 7€, though I'll have to double-check to make sure none of the components get squashed by the AC adapter during shipping.
But as long as someone orders the case, I can just put the fragile parts in there...

@lenconian:
IF we jump for the Farnell enclosures, I'd of course order each part where it is cheaper.
I just don't want to start with TTI, Conrad, Reichelt or other vendors to save another penny or two, thats all...
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Old 31st August 2011, 08:48 PM   #25
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In for one kit too though not for enclosure, batteries, w/t.
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Old 31st August 2011, 08:49 PM   #26
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What are the dimensions of the PCB ?
Also, please can you post a link to the wall adapter ? Or just specify if it's a cheap Chinese switching one or a linear regulator (for lower noise maybe) ?
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Old 31st August 2011, 09:46 PM   #27
MauroR is offline MauroR  Italy
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I'm interested in 2 kits and one enclosure.
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Old 1st September 2011, 12:16 AM   #28
Atilla is offline Atilla  Norway
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I'm interested in 1 kit.

I'd go for a case, but I do think that a separate GB is a good idea. It will leave you with 1 less thing to worry about as well.

At any rate, I'd like to see it, at least on design/render before saying yes.
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Old 1st September 2011, 02:24 AM   #29
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Quote:
Originally Posted by fireworks View Post
What are the dimensions of the PCB ?
Also, please can you post a link to the wall adapter ? Or just specify if it's a cheap Chinese switching one or a linear regulator (for lower noise maybe) ?
It's neither. It's an AC-to-AC wall transformer. For Europe that's 230 VAC in and 12 VAC out (up to 18 VAC is OK). DC adapters, regulated, switching, or otherwise, won't work.

The PCB is 80mm x 100mm. There's a drawing provided.

All such details are here: O2 Details or the summary version.
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Old 1st September 2011, 03:07 AM   #30
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Two kits for me, could also possibly be interested in the full package (enclosure + AC adapter + batteries)
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