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t0mpr1c3

[Group Buy-18][D] WS2812 SMD RGB LEDs with integrated driver chip

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OK Vic. A USPS money order is absolutely fine and no hassle. USPS only please - I am near a post office but miles from a bank. I will PM the postal address when the time comes. If anybody else wants to send a USPS money order that is also not a problem.

 

One slot of 125 is left. I'll leave it open for a day or two and if there are no takers I will take another 50 extras myself and we are up to 1000.

 

I doubt it will come to that. I am impressed with the take up for this project. Thanks for doing the (re)design greeeg. You have a hit on your hands here!

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Okay. I have finished the design files using the new footprint. they are up on the project page. http://forum.43oh.com/topic/4920-120-led-ring-clock/?p=43802

 

There is 2 versions. an identical sized one to the original but with the WS2812B footprint. then a double version to fit on a 5x10cm board. I did check it does fit within a 5x10cm rectangle.

 

Currently these PCBs do not include any mechanasim for driving the LEDs. The entire back of the boards are clear except for a VCC plane. I could create a driver circut based on an MSP430 (of course). if a timely consensus can be made on the MSP used and the included footprints (buttons, IR sensor?, ambient light?) I could whip this up quickly.

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I am in for 2 sets of 125 LED's 2 sets of PCB's.  I am only interested in the LED's if we are able to get the PCB's along with them.

No spare LED's.  I have a way to drive them so as long as the PCB's provide the basic DO --> DIN chaining, I am good to go!

 

WS2812 or WS2812B's are fine as long as the PCB's will accept either.

 

PS Thanks for your efforts.

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Thanks marsbase. I'll put you down for PCBs too.

 

We are now at 1200 LEDs including extras. I am looking at 12 lots of 100 WS2812Bs from this seller on Aliexpress ($183.43 shipped DHL) or possibly 2 lots of 600 from this seller on eBay ($190 shipped surface). The first option would work out to $19 per set of 125 LEDs before shipping from me to you and Paypal commission.

 

PCBs will probably take longer than usual because Chinese New Year is coming up. I am planning to use Elecrow (green, 100% E-test, HASL finish). Shipping the PCBs by DHL would be my favoured option. It would cost a dollar or two more per set than HK post, depending on how many we order. 

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Anybody else? I'm just waiting on Greg to tell me whether he wants PCBs.

 

If you are is not in the USA please PM me your postal address so I can estimate shipping costs. I will send everything out USPS first class / first class international which is generally cheapest and reasonably fast. Because I don't know exactly how much the stuff will weigh I will use the sellers listed product weight and add on 50g/2oz for packaging. That is likely to be on the high side so I will refund any excess via Paypal. 

 

Within the USA I expect sending LEDs (50g/2oz plus packaging) to cost about $2 and to send LEDs + 1 set of boards (160g/6oz plus packaging) no more than $3. As a rule of thumb for international rates you can multiply that by 4. I'm sorry it's so expensive to send international, if there was a cheaper option I would use it. International delivery time is quoted as 6-10 business days.

 

Here's the USPS shipping calculator to check the likely costs: My zip code is 19072, select "package", weight, and "First class international options" to get an estimate.

 

http://ircalc.usps.gov/

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Thanks to the whole group for making this a success.

 

Although we have not decided if we would include a mechanism for driving the LEDs. The entire back of the PCBs are clear and I personally would vote to create a driver circut based on an MSP430 like @@greeeg said before.

 

@@t0mpr1c3 What do you think about this?

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Yes, there's plenty of space on the back. I will go with whatever Gerbers Greg gives me. Can you suggest a schematic?

 

I have no experience with these pixels. The only objection I can think of is that WS2812Bs run at 5V and MSP430s run at 3.3V.

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@t0mpr1c3 @RobG @@greeeg I'd suggest any design changes to be posted in greeeg's thread or a separate clock redesign thread. Posting it here will break the design trail.

 

Keep this post for GB only. This will make it easier for all.

Thanks all!

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If anyone wants to join the wait list please sign up on this thread. 

 

I will throw the wait list open next week if any of the people currently signed up change their mind.

 

First come first served. Paypal only please.

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