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yergacheffe
Jan 22, 2007
Whaler on the moon.

Alright I just blew up an LED by hooking it up to a 9V battery without a resistor. So I've got a quick question, can I hook up a resistor on the cathode side of the LED like this:



Or does it have to be on the anode side? I'd try it out but I don't have any more LEDs I can sacrifice.

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yergacheffe
Jan 22, 2007
Whaler on the moon.

Thanks for the answers, for the curious I was building this PC fan controller:

http://www.cpemma.co.uk/sdiodes.html

As I understand it, this thing uses diodes to make voltage drops from the +12v rail of the psu, which in turn controls the voltage that the fan actually receives. My question is, why can't we use resistors or even a potentiometer to achieve the same effect?

yergacheffe
Jan 22, 2007
Whaler on the moon.

Anyone have experience with rework stations? In particular, I'm looking to buy this one:

http://circuitspecialists.com/prod.itml/icOid/9766

I'm not too sure how interchangeable this station is with other tips/nozzles, and I haven't been able to find many reviews on the net about any rework stations at all.

yergacheffe
Jan 22, 2007
Whaler on the moon.

Thanks for the feedback on the rework station guys. I guess for now I'll be going with the CSI-STATION1A as my iron. It's a knockoff of a Hakko 936, so it seems it'll do for the small hobbyist electronics work I'll be doing. That, and I can't seem to find a middle ground between the Hakko936/Weller WES51 range to a Metcal. Do you guys have any suggestions on which hot air stations to look at?

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