villex
Full Member
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Activity: 154
Merit: 100
Mining hardware assembler and administrator.
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June 12, 2013, 08:06:17 PM |
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Sure, I understand the role that the heatsink plays ;-), I just explained myself poorly! The heatsink still needs to heat the air around it in order for this warm air to be carried away by the airflow from the fan. Since the airflow wont be perfect, why fight any natural convection by having the heatsink upside down? I'm sure that you're right, it's not going to be a problem with 40W of power per board, but every little helps right?
actually this is not right as it was said the heatsink is the dissipation device where the cool air dragging the heat elsewhere, you don't have to heat the air more than cool the heatsink. |
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Schrankwand
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June 12, 2013, 08:10:36 PM |
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The advantage of heatsinks is, that the heat can spread through the aluminium and then be cooled by the airflow of the fan, and therefore does not have to "rise" upwards ;-)
So i think the effect you mean should be minimal.
The "rising upward" does only appear, when air is heated. It does not occur, when heat is spreading in a soldid material.
Sure, I understand the role that the heatsink plays ;-), I just explained myself poorly! The heatsink still needs to heat the air around it in order for this warm air to be carried away by the airflow from the fan. Since the airflow wont be perfect, why fight any natural convection by having the heatsink upside down? I'm sure that you're right, it's not going to be a problem with 40W of power per board, but every little helps right? The original Avalon Design was for nearly perfect airflow, actually. |
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jlsminingcorp
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June 12, 2013, 08:35:32 PM |
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The advantage of heatsinks is, that the heat can spread through the aluminium and then be cooled by the airflow of the fan, and therefore does not have to "rise" upwards ;-)
So i think the effect you mean should be minimal.
The "rising upward" does only appear, when air is heated. It does not occur, when heat is spreading in a soldid material.
Sure, I understand the role that the heatsink plays ;-), I just explained myself poorly! The heatsink still needs to heat the air around it in order for this warm air to be carried away by the airflow from the fan. Since the airflow wont be perfect, why fight any natural convection by having the heatsink upside down? I'm sure that you're right, it's not going to be a problem with 40W of power per board, but every little helps right? The original Avalon Design was for nearly perfect airflow, actually. Great stuff, thanks for the clarification! |
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jlsminingcorp
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June 12, 2013, 08:53:13 PM |
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Sure, I understand the role that the heatsink plays ;-), I just explained myself poorly! The heatsink still needs to heat the air around it in order for this warm air to be carried away by the airflow from the fan. Since the airflow wont be perfect, why fight any natural convection by having the heatsink upside down? I'm sure that you're right, it's not going to be a problem with 40W of power per board, but every little helps right?
actually this is not right as it was said the heatsink is the dissipation device where the cool air dragging the heat elsewhere, you don't have to heat the air more than cool the heatsink. I think we're all saying the same thing actually, just in different ways. To cool the heatsink you need to heat the air passing by it - 1st law of thermodynamics. This is way off topic, I'm going to shut up now ;-)! |
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burnin (OP)
Sr. Member
Offline
Activity: 243
Merit: 250
ALTCOM Ab9upXvD7ChnJxDRZgMmwNNEf1ftCGWrsE
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June 12, 2013, 11:58:05 PM |
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@burnin... i shipped 20 sample chips to you...  Ill send you a pm with the trackingcode. 30 samples were delivered... 20 samples are on its way to burnin... Unfortunately i was 2 minutes too late at the post counter so it will be taken tomorrow from that branch. This way sending via express didnt make sense anymore... so it should be with burnin the day after tomorrow... I worked with antistatic workspace and pincette. I really hope i did everything correctly. Ill post later some pictures of the chips. They are really awful tiny. The other chips i will package today after checking back with zefir. Awesome news! Now to the bad news: I hadn't really anticipated chip delivery this week when I ordered the boards, so they are still in production at my PCB manufacturer. They should arrive next week though. I'm might do initial tests with a single chip in dead-bug style for uC firmware verification in the meantime. Sorry, I can't read the whole thread. Are you selling the PCB kit or just offering the assembly?
I do offer unpopulated PCBs but those don't include the parts. You'll have to order them yourself. What's the timeframe looking like these days??
So far Its looking like I am on schedule to begin delivery in mid July if everything works out as planned. |
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sprint347
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June 13, 2013, 04:51:32 AM |
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aww yiss
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sprint347
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June 13, 2013, 06:36:15 AM |
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So a switchmode power supply (12v DC @ 5A) should power a 10 chip device easily? Is the dc plug socket 2.5mm and can you tell us the polarity? I'm on the hunt for a PSU |
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Defkin
Member
Offline
Activity: 80
Merit: 10
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June 13, 2013, 06:58:55 AM |
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Just got my PSU, how is that for grunty connectors   |
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sprint347
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June 13, 2013, 07:33:58 AM |
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I love that brand name  |
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pitchbend
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June 13, 2013, 08:51:28 AM |
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Hi Burnin since you'll be launching soon the ordering website I'd like to suggest a way to avoid and ordering/preordering/chip-batch matching mess (like what happened with KnC).
All chips come from batches and all batches are time-stamped so once you figure out which group buys are interested in your services, it should be very easy to organize a queue based on batch ordering date. It'll make sense for example if you open orders by turns to specific chip-batches based on ordering date, instead of opening for everyone at once and flooding the website and having to match orders to chip batches afterwards.
For example you first open order books for Zefir Batch 1 from April 16th (assuming this is the earliest one) for like 3 days or so, then you open order books to the next batch based on ordering date, and so on and so forth...
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mine2mind112
Member
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Activity: 73
Merit: 10
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June 13, 2013, 08:57:40 AM |
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Hi Burnin since you'll be launching soon the ordering website I'd like to suggest a way to avoid and ordering/preordering/chip-batch matching mess (like what happened with KnC).
All chips come from batches and all batches are time-stamped so once you figure out which group buys are interested in your services, it should be very easy to organize a queue based on batch ordering date. It'll make sense for example if you open orders by turns to specific chip-batches based on ordering date, instead of opening for everyone at once and flooding the website and having to match orders to chip batches afterwards.
For example you first open order books for Zefir Batch 1 from April 16th (assuming this is the earliest one) for like 3 days or so, then you open order books to the next batch based on ordering date, and so on and so forth...
+1 |
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g83
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June 13, 2013, 09:03:17 AM |
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Maybe burnin could ask for the batch and orderplace in this within the orderprocess...
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madmax_ger
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June 13, 2013, 09:10:04 AM |
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Maybe burnin could ask for the batch and orderplace in this within the orderprocess...
much better, then the database will do the magic. since burnin seems to be a professional, I have no doubt he will get this managed too |
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Schrankwand
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June 13, 2013, 09:10:46 AM |
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Maybe burnin could ask for the batch and orderplace in this within the orderprocess...
much better, then the database will do the magic. since burnin seems to be a professional, I have no doubt he will get this managed too He has already stated that he is using Chips and order scripts. I doubt he will change anything, since he thought up the process already. |
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pitchbend
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June 13, 2013, 09:21:08 AM |
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Correct me if I'm wrong but he just said that batch number will be relevant, but he didn't specify how the actual process will work. The problem with asking for batch number during the ordering process is that he will need to also implement a checking feature, to filter people making mistakes (or intentionally) and choosing a wrong batch number for their orders. Maybe asking for a signature with the ordering address? it sounds cumbersome. That's why IMHO it should be nice if he gives the specifics about the ordering process so we know how important (if at all) it is to order fast once the website opens. Maybe burnin could ask for the batch and orderplace in this within the orderprocess...
much better, then the database will do the magic. since burnin seems to be a professional, I have no doubt he will get this managed too He has already stated that he is using Chips and order scripts. I doubt he will change anything, since he thought up the process already. |
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Micky25
Legendary
Offline
Activity: 974
Merit: 1000
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June 13, 2013, 10:01:01 AM |
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I don't like the idea of adding the order row from burnins website since the beginning. IMO it's an unneeded and annoying additional variable, which ends up beeing like a lottery game.
The easiest way could be, to just use the order sequence and date in the particular group buys and merge these lists. Somehow like this:
Group buy SebastianJu
13.04.2013 200 Chips ordered by user XXX for DEV burnin
15.04.2013 100 Chips ordered by user ZZZ for DEV burnin
Group buy Zefir
14.04.2013 100 Chips ordered by user YYY for DEV burnin
16.04.2013 100 Chips ordered by user WWW for DEV burnin
18.04.2013 100 Chips ordered by user WWW for DEV burnin
Order row:
1. 13.04.2013 200 Chips ordered by user XXX for DEV burnin
2. 14.04.2013 100 Chips ordered by user YYY for DEV burnin
3. 15.04.2013 100 Chips ordered by user ZZZ for DEV burnin
4. 16.04.2013 200 Chips ordered by user WWW for DEV burnin
Because all ordered Batches will probably arrive at the same time, later stock up buys could be accumulated on the first buy of the same user. There would be no need to verify the Batch-No. during the ordering process and no mess with stock up buys.
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pitchbend
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June 13, 2013, 10:20:53 AM |
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Yes this was exactly my idea and I think it makes the most sense. Let's see what burnin thinks I don't like the idea of adding the order row from burnins website since the beginning. IMO it's an unneeded and annoying additional variable, which ends up beeing like a lottery game.
The easiest way could be, to just use the order sequence and date in the particular group buys and merge these lists. Somehow like this:
Group buy SebastianJu
13.04.2013 200 Chips ordered by user XXX for DEV burnin
15.04.2013 100 Chips ordered by user ZZZ for DEV burnin
Group buy Zefir
14.04.2013 100 Chips ordered by user YYY for DEV burnin
16.04.2013 100 Chips ordered by user WWW for DEV burnin
18.04.2013 100 Chips ordered by user WWW for DEV burnin
Order row:
1. 13.04.2013 200 Chips ordered by user XXX for DEV burnin
2. 14.04.2013 100 Chips ordered by user YYY for DEV burnin
3. 15.04.2013 100 Chips ordered by user ZZZ for DEV burnin
4. 16.04.2013 200 Chips ordered by user WWW for DEV burnin
Because all ordered Batches will probably arrive at the same time, later stock up buys could be accumulated on the first buy of the same user. There would be no need to verify the Batch-No. during the ordering process and no mess with stock up buys.
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Kiders
Member
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Activity: 98
Merit: 10
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June 13, 2013, 11:09:49 AM |
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Ordering will be done through an dedicated website that is not up yet.
I'll announce the launch through my email newsletter.
where can i sign up for the newsletter?
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Micky25
Legendary
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Activity: 974
Merit: 1000
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June 13, 2013, 11:16:57 AM |
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Ordering will be done through an dedicated website that is not up yet.
I'll announce the launch through my email newsletter.
where can i sign up for the newsletter?
This information can be found inside this thread, using the search function and the word "newsletter". But since I try to be a nicer person in the last time, I did this for you. https://bitcointalk.org/index.php?topic=179769.msg2217846#msg2217846 |
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Kiders
Member
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Activity: 98
Merit: 10
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June 13, 2013, 11:23:56 AM |
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That was very nice of you! i scrolled the first page up and down several times :S who though it would be on page 21 ur the man! |
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