NUD4001 CC LED Driver Group Buy Interest

[DavidHenry]

The first pass is to get an idea of the interest in the NUD4001 SOIC constant current LED driver (used in the new single LED strobes with the PCB's)

Current pricing from Mouser:
1: $1.01
25: $0.89
100: $0.702
500: $0.648
1,000: $0.513
2,000: $0.364
Reel of 2500
2,500: $0.364
5,000: $0.351
10,000: $0.34

I thin most of us are in the 100 range, so a group buy of 2000 or so drops the cost nearly in half (excluding shipping PayPal, etc). Given the size and weight of these, I wouldn't think there would be much in postage.

[DavidHenry]

200 DavidHenry
250 budude
200 Skunberg
100 cbell
200 slovanredneck
120 blickensderfer
100 LabRat
200 mschell
160 solidmodeler
120 rca
120 maffeirw
120 yvaliente
120 marble42
200 vairmoose
80 stenersonj
100 Jack Stevens
250 Trike
200 Dragon88
100 Aurbo99
10 chilloutdocdoc
100 DIY Guy
400 KeithTarpley
100 N7XG
120 Braveit1
120 cenote
60 dirknerkle
200 D56VillageNut
200 Jeremy Wiles
270 jrock64
80 klomp10
120 rmonty
400 Goldie
180 sctrpete
80 DanoNJ
200 deplanche
100 WireWrap
200 lizard050
150 fathead45
200 Sly
200 Aproct
100 tbrenton
100 steve_hirst
100 StandingInAwe85
80 acreiss

6810 Total

[budude]

WooHoo - - was hoping someone would step up!

I'm in for 250.

Thanks!

[Skunberg]

put me down for 160

[cbell]

I'd take 100.

[slovanredneck]

I'm in for 200.

[blickensderfer]

I would take 120

[LabRat]

In for 100

thx

[mschell]

Add me for 200... (Still don't know what I'm going to use these for...)

[solidmodeler]

Put me in for 160.

Thanks for the op

[rca]

I'd be interested in 120.

Ron

[maffeirw]

Please put me down for 120.
BTW - If you don't make the 2000 mark, it looks like newark has them, for $0.461 in >1000 quantities.

http://www.newark.com/on-semiconductor/nud4001dr2g/led-driver-ic/dp/70K4034

[yvaliente]

I'd be interested in 120.

Thank you Yvaliente

[marble42]

put me in for 120

[vairmoose]

I'll jump in for 200.

Larry

[ukewarrior]

The rub is that Mouser has these on order and shows a delivery date of 8/31/2010. We may need to find another supplier with parts in stock. Digikey shows to have over 10K of these in stock. At 2500 they are 37 cents ea.
You can easily find other suppliers of this part and their inventory levels by going to on semi's web site and going to the detail page for NUD4001 and clicking the 'inventory' link.
i.e.
http://www.onsemi.com/PowerSolutions/product.do?id=NUD4001

Of course, the oddest thing of all is that On Semi shows they will sell these DIRECT for only 27 cents in 2500 piece reels, but if you put that quantity in your cart, they are actually 50 cents each. Too bad.


The first pass is to get an idea of the interest in the NUD4001 SOIC constant current LED driver (used in the new single LED strobes with the PCB's)

Current pricing from Mouser:
1: $1.01
25: $0.89
100: $0.702
500: $0.648
1,000: $0.513
2,000: $0.364
Reel of 2500
2,500: $0.364
5,000: $0.351
10,000: $0.34

I thin most of us are in the 100 range, so a group buy of 2000 or so drops the cost nearly in half (excluding shipping PayPal, etc). Given the size and weight of these, I wouldn't think there would be much in postage.

[stenersonj]

i would buy 80.

[Jack Stevens]

OK, 100 for me as well.

[Trike]

I'll take 250.

[Dragon88]

In for 200

[Aurbo99]

I'm in for 100

[budude]

How about an SMD resistor group buy as well? This will be much simpler since it's a fixed current limit value not associated with a particular LED color/type, etc. Perhaps a 100mA and 300mA value? We'll need LEDs for this as well. Let me ask around and maybe we can get something going - I'll start another thread for interest...

[dirknerkle]

how about an smd resistor group buy as well? This will be much simpler since it's a fixed current limit value not associated with a particular led color/type, etc. Perhaps a 100ma and 300ma value? We'll need leds for this as well. Let me ask around and maybe we can get something going - i'll start another thread for interest...

good luck trying to sort those babies!!! Hah!!!

[chilloutdocdoc]

Seems like a low number, but can I be in for 10? Just trying to test them out, not for the strobe, but for something else.

Thanks

[DIY Guy]

In for 100

[aussiephil]

good luck trying to sort those babies!!! Hah!!!

Easier to deal with then normal ones as they come in the rolls, basically you count by measuring the length for say 100 count once, then just cut to length.

so simple

[DavidHenry]

Seems like a low number, but can I be in for 10? Just trying to test them out, not for the strobe, but for something else.

Thanks

I'm not sure what you'd save this way.

Based on the way the boards come in sheets, I figured I'd at least limit to multiples of 10.

[LabRat]

I'm not sure what you'd save this way.

Based on the way the boards come in sheets, I figured I'd at least limit to multiples of 10.

Did you mean 40? or 10?

[DavidHenry]

Easier to deal with then normal ones as they come in the rolls, basically you count by measuring the length for say 100 count once, then just cut to length.

so simple

Are we talking about the resistors for the LED Driver? I was planning on the cut to length method for the LED drivers. I did look at the resistors, and I think the total for a quantity of 215 was a bit over $2. Between that, and all of the possible values I figured it was a lot of time investment for very little savings, but if it turns out that the resistors are tape and reel, and there is interested I'll entertain adding them in to the group buy. If nothing else, it would save everyone on the shipping charges for a separate order.

[Skunberg]

I'm in for 160 resistors.
LEDs too if we get there VBG
Can I plan on 5vdc too?

[chilloutdocdoc]

yes i meant 10... I'm not using these for the strobes, i'm planning something else, it's just convenient that there's a CC chip group buy running at the same time.

[dirknerkle]

ON Semiconductor has the chip for $.27 in quantities of 2500...
Looks like quite a bit less expensive than Mouser...

http://www.onsemi.com/PowerSolutions/product.do?id=NUD4001

[ukewarrior]

I posted this earlier, but if you put it in your basket, you don't get that price !

ON Semiconductor has the chip for $.27 in quantities of 2500...
Looks like quite a bit less expensive than Mouser...

http://www.onsemi.com/PowerSolutions/product.do?id=NUD4001

[KeithTarpley]

Greetings,,,

Please put me down for 400.

Thanks for the work on this.

Keith

[N7XG]

Got my attention.

Sign me up for 100

[Braveit1]

120 for me.
Thanks.

[cenote]

i'd be in for 120

[aussiephil]

Just a heads up for members here
All

I have one resistor value to be fine tuned under practical testing and then the Circuit and BOM can be published, sorry for the delay.

Due to the effective low weight of resistors and transistor/PIC I will be ordering the following components that can be bundled with the PCB. It is likely cheaper to buy these for all your PCB's even if not used immediately but partial orders will be fine.

Parts:
1 x 2 Ohm resistor for a 1W LED
1 x 7 Ohm resistor for a 1/2W LED
2 x Resistors for option 2/3 build
1 x 2n2222 Transistor for option 2/3 build
These parts will cost 10c per pcb (at 5000 units)

If there is demand i would also consider the PIC

In the next 24 hours i will start another Bulk Buy for the additional components other than the NUD4001.

Cheers
Aussiephil

[yvaliente]

Maybe we should wait on this order just in case thing change, base on Phil recommendation.

[aussiephil]

Maybe we should wait on this order just in case thing change, base on Phil recommendation.

The NUD4001 will not change :) it is locked in as a required part.

Cheers
Aussiephil

[dirknerkle]

I'll go in for 60

[DavidHenry]

Based on the interest so far [totals in 2nd post], I'm going to say this will be a go once a few other details on the PCB buy are finalized.

Parts will be sourced where available and give us the best deal.

[D56VillageNut]

I'd be in for 200.

Thanks

Alan T
D56VillageNut

[Jeremy Wiles]

I'm in for 200.

Thanks!

[jrock64]

270 for me please & thank you.

Joel

[klomp10]

I would be in for 80, thanks

[Skunberg]

If this group buy isn't closed yet, please bump my 160 order to 200 (due to the added random feature). Thank's! Brian

[rmonty]

I will be in for 120. Thanks for doing this!

Ryan

[Goldie]

Hi Dave

put me down for 400

Please

[sctrpete]

Put me down for 180 - Please@@@:D

Pete

[DanoNJ]

I'll need 80, please. Thanks!

[deplanche]

sign me up for 200 please

[WireWrap]

I'll need 80, but as my age increases, so does my "Stuff-it factor", so please put me down for 100.


:)

[lizard050]

put me down for 200 please.

[fathead45]

yea put me down for 150

[Sly]

Please put me down for 200.

Thanks.

Sly

[Aproct]

I will take 200

[tbrenton]

I'd take 100.

TB

[steve_hirst]

120 for me

[mschell]

Just so everyone is aware - this is an "Interest" thread, not a definite group buy.

And Aussie Phil is considering a group buy that includes the driver chip and resistors, perhaps even the LEDs, and possibly a PIC that would allow the device to do the strobe itself.

All the parts are SMD, so be aware you'll be doing some tiny soldering or having to use a reflow oven or griddle.

[budude]

Just so everyone is aware - this is an "Interest" thread, not a definite group buy.

And Aussie Phil is considering a group buy that includes the driver chip and resistors, perhaps even the LEDs, and possibly a PIC that would allow the device to do the strobe itself.

All the parts are SMD, so be aware you'll be doing some tiny soldering or having to use a reflow oven or griddle.

Good point Mark - we're already well beyond the initial price points anyway (> 5000) so a few more here and there won't really change the price (another penny at most!). I'm not sure there's any point in continuing with this interest thread now because of that - it's clear there is more than enough interest!

[aussiephil]

Just for everyones information...

I have posted the parts group buy over at ACL
http://forums.auschristmaslighting.com/index.php/topic,206.new.html

The Bulk Buy board is in a members only area so apologies to all who are not members, please understand that this is not an attempt to force you to join as i am sure the one of the cross site members will run a complementary buy here. There is more than enough demand that dual buys will not hurt any discounts.

cheers
Aussiephil

[mschell]

Looks like Phil's group buy has different options for parts. The LED driver mentioned here is one of those options. Import duties to/from Australia add overhead to buying them domestically. So I would be for someone doing a full group buy for these LED driver chips and possibly the PICs in the US.

[aussiephil]

Looks like Phil's group buy has different options for parts. The LED driver mentioned here is one of those options. Import duties to/from Australia add overhead to buying them domestically. So I would be for someone doing a full group buy for these LED driver chips and possibly the PICs in the US.

Fully supported, i would even be happy to add my total NUD4001 requirement to this buy and just have one bulk shipment for the Aussie crowd.

If that would be OK?

Cheers
Aussiephil

[mschell]

Looks like Phil's group buy has different options for parts. The LED driver mentioned here is one of those options. Import duties to/from Australia add overhead to buying them domestically. So I would be for someone doing a full group buy for these LED driver chips and possibly the PICs in the US.

Note that I'm not volunteering to do this, since I'll be having surgery on 7/22 and would be unable to spend much time on it this month or early next month.

David, you started this thread - are you up to it?

[chilloutdocdoc]

I could ship/sort possibly. I've never run a group buy though, and don't quite have the expertise or the funds of doing it, but seeing as I'm only 18, give me a bit of caffiene, and you're good to go.

[fathead45]

i sent david a pm, just waiting to hear from him. im willing to take on the task since i wll have almost everyones boards already at my house. i would be willing to do different packs so you can choose what you want.

ill make a post tonight after i get all the cost lined out. it would not cost anything extra to ship these out as i can fit them into the boxes of pcbs.

[StandingInAwe85]

it would not cost anything extra to ship these out as i can fit them into the boxes of pcbs.

Seeing how everyone getting these is likely in the co-op for PCB's, that sounds like a great idea. I know this is only an interest thread, so I'll state that I'm in for 100 (unless the price increases from the 35-36 cents it's at now).

[acreiss]

I'm in for 80 if it's possible...

[DavidHenry]

Made a list of the good and bad about me personally running the group buy.

Pro
1. I can contribute something to the community.
2. I save more money.

Con
1. Everyone else saves less money.
2. I'd need to keep track of a bunch of stuff.
3. Counting parts, do I really want to count parts?
4. Packing up parts.
5. Trips to post office to ship parts.
6. Explaining to wife why I need to do #2-5 when I've got so may other things on the to-do list.

I'm guessing I don't need to take a survey of the other 42 potential participants to come to the conclusion that it makes the most sense if I don't run the group buy.

I did update the recent totals on post #2 in the thread, so it should serve as a good starting point for the actual buy.

[aussiephil]

Hi all

Hopefully people are still checking in.

Mouser appear not to have stock until end of August, this may actually work out ok but does cut it fine.

I haven't looked into other sources in the US at this time.

I have a confirmed quote for any quantity from one of my suppliers at US0.45c and i'm hoping to talk 2c off that price so i can hold the 43c i quoted in my parts Bulk Buy.

If i better deal can be done, let's do it.

Cheers
Aussiephil

[StandingInAwe85]

Has anyone looked into ordering these from DigiKey? If I'm understanding this correctly, if we order in multiples of 2,500 (greater than 5,000) we can get the same price Mouser has (US $0.351 each). Perhaps whoever runs this group buy could say it's limited to the first 5,000 (or 7,500) ordered and paid for. They have over 100,000 in stock now

http://www.digikey.com/scripts/dksearch/dksus.dll?Detail&name=NUD4001DR2GOSTR-ND

[fathead45]

might just work, im working on putting together the group buy right now. will be up by tonight. thanks

[marble42]

don't know if this is the same but take a look

http://www.onsemi.com/PowerSolutions/product.do?id=NUD4001

price was .24 when i looked last

[StandingInAwe85]

don't know if this is the same but take a look

http://www.onsemi.com/PowerSolutions/product.do?id=NUD4001

price was .24 when i looked last

That, to my knowledge, is the same thing. That page is actually how I found out digikey has lots of them in stock. If you click "check stock", you'll see the inventory status of their distributors. I'm not sure anyone would be able to buy from the MFG direct on this.

[fathead45]

once you add it to your cart from onsemi.com it goes to like .57 each. ukewarrior found it first.:(

[dirknerkle]

Wasn't there some kind of group buy that happened with these? And I vaguely recall there were some SMD boards, too... I think I paid for a bunch of stuff and shipping but it's so long ago, I can't remember what the buy was for or about. Anybody remember?

[Matt_Edwards]

You mean this one (http://doityourselfchristmas.com/forums/showpost.php?p=119985&postcount=1)?

with an amount of mechanical work to be done, these strobes look like a good option for next years display.

[budude]

You mean this one (http://doityourselfchristmas.com/forums/showpost.php?p=119985&postcount=1)?

with an amount of mechanical work to be done, these strobes look like a good option for next years display.

Yep - took just a tad too long I'm afraid - on to sequencing now... :(

[dirknerkle]

Thanks for the reminder. I know it's way too late for this year, but has anybody heard whether the program is still active or whether it's dead?

[budude]

Thanks for the reminder. I know it's way too late for this year, but has anybody heard whether the program is still active or whether it's dead?

Last I heard, all of the US boards were shipped to fathead45 (Matt) and he since started the LED coop and was going to combine everything (as well as the other parts). Sounds like Matt was pretty busy with work lately... Not sure I would have gotten them done anyway so no big deal.

[dirknerkle]

Last I heard, all of the US boards were shipped to fathead45 (Matt) and he since started the LED coop and was going to combine everything (as well as the other parts). Sounds like Matt was pretty busy with work lately... Not sure I would have gotten them done anyway so no big deal.

Cool, thanks budude. I suspect that some day a package will arrive and as has happened so many times before, my wife will go into "the routine..." :rolleyes:

[WireWrap]

Cool, thanks budude. I suspect that some day a package will arrive and as has happened so many times before, my wife will go into "the routine..." :rolleyes:

Better get the "counter-routine" warmed up... :rolleyes: :rolleyes: :rolleyes:

Matt's just about ready to start shipping, despite trying to stuff 10-lbs of work into a 5-lb bag. Any day now...



:)