Gun Safe light revisited

Apr 17, 2005 3 Replies
C

After some more research, I think I will try the CAT32 chip



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However I have a few problems. I don't want to have a special PCB made for this project. So I was going to use an SOT-23-6 to .100" pin adapter board from digikey, and then the rest of the components on a generic prototype board.. After looking closer, I found that the only recommended inductor I could find has to be purchased in quantities of



2000. From reading the data sheet it sounds like having a very low DCR is one of the more important properties of the inductor. I found a high current inductor of the correct value that has an even lower DCR than the recommended ones, will that work fine? Specifically I am talking about digikey PN |M5804-ND data sheet,
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I can find capacitors with the recommended specs and the diode but both are surface mount, can someone recommend a non surface mount capacitor and diode that will be compatible?



BTW, for the dimming I was going to experiment with a 555 timer and a photo resistor to create the PWM input to the dimmer control pin of the CAT32.



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Chris W Gift Giving Made Easy Get the gifts you want & give the gifts they want http://thewishzone.com
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F

That's the problem with SMD in general; with many items, the only way to get a-few-bits is to know a friendly distributor, who will send samples on request. Usually, one's business has to buy something in return.

I still do not understand why it is necessary to be so clever; A linear transistor circuit made with good-olde discretes could do the same job perfectly well.

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M

To the OP: Did you check at DigiKey for Qty 1? They'll sell tape and reel or one-sies, your choise.

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J

Michael wrote in news: snipped-for-privacy@att.net:

I bought 3 of the LT1932 IC for my LED flashlight circuit from Digi-Key. (Along with the other 5 components needed;rectifier,resistor,caps,inductor for each IC circuit) I had to buy the caps and resistor in quantities of 10 though.Not much of a price increase.

Jim Yanik jyanik at kua.net
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