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Something on the order of this: So perhaps it is okay. Part and Inventory Search. So I’m using a small fan that works perfectly, but is quite noisy when at full load.

dataeheet Equating complex number interms of the other 6. Ratasheet you want to search a similar part from the parts available at your local shop, compare Vgs off and Idss. The problem is that the GPIO pin aren’t powerful enough to drive the fan plus it would be dangerous for the Pi itself. The transistors I have several pieces in each case: So from that fact, I arrived at the given resistor values above.

Often, it’s lower 2n44392 that, but sometimes it may be a little higher. So that’s the goal for turning off the load. I can even use PWM to control the speed of the fan. I edited the OP. You could measure it, too.



Theres still some small details I barely understand, but I’m sure I’ll understand them as soon as I’ll take the time to retry doing the math on my own which is actually the best way to understand something.

Then, highlighting the common factor on the left: As I said in the title, I’m looking for a transistor that I could use for switching a Raspberry Pi 5v. Post as a guest Name. So this is one of those compromise decisions that are sometimes required to balance competing issues. I’m still trying to understand the maths you did. You buy another one. But R1 can be most anything that is as large as or larger than 1k or so.

HerrCrazi Well, that makes things lots easier. I’dbe glad if you could help me picking the best transistor, preferably within the ones I already have. HerrCrazi If you use the first circuit, the values are both important.

But it is all worth a try. ModelSim – How to force a struct type written in SystemVerilog? But it would help to know what you think you follow, already, because that could save me time.


You could also consider a fan with a PWM control input. I thought your question was pretty well-framed. You’ll need a a lot of base current, so use a base resistor of Should I mount it exactly like a standard NPN transistor? Must the values of these resistors be exactly as you said, or would it be possible to use only one of them? How reliable is it?

Also I may seem annoying, sry: Dec 248: But that’s probably okay. Synthesized tuning, Part 2: Choosing IC with EN signal 2.

Heat sinks, Part 2: I’d prefer still more base current.


Can the voltage measured in the CRO be converted to its equivalent power? By using our site, you acknowledge that you have read and understand our Cookie PolicyPrivacy Policyand our Terms of Service. Now, this datasheft a bit datashest a compromise. Anyone can give me a datasheet about Charge-scaling DAC? That’s why I would prefer being able to control it with a GPIO pin which is completely doable, I’ve seen a lot of tutorials about that.