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Topic: Basic Ohms law problem (Read 2 times) previous topic - next topic

kculm

#20
Feb 02, 2013, 08:23 pm Last Edit: Feb 02, 2013, 08:24 pm by kculm Reason: 1



The problem with that is you seem to be (or wanting to) learning basic electronics by memorizing a series of 'rules', rather then studying basic electronics DC

Lefty


Now that's that kind of Input I am looking for.  I have posted all over what would be the best way to get started in all this. I was not really getting any good input. Most would tell me to do the Arduion examples.
Even though that just shows me how to do things and not why.  

I agree with you, I need to study the Basics first.

My issue is, I learn better by doing. I have found a few books on the subject but it's hard for me to retain unless I see it in action. That is way I have been doing some real odd ball projects.

If you have any recommendation on Books, I would be very grateful.

Thanks
 

Grumpy_Mike



fungus



A diode would be better. Silicon diodes drop the voltage by about 0.7V when it passes through them. Two of them in series would drop it by 1.4V, etc.

Would I just put it inline with the Pos. side of the power?


Yep.
No, I don't answer questions sent in private messages (but I do accept thank-you notes...)

dhenry

#24
Feb 02, 2013, 11:03 pm Last Edit: Feb 03, 2013, 12:40 am by Nick Gammon Reason: 1
Quote
Witch in reality puts out 6.24vdc and makes my scanner blink crazy.


If your arduino runs off an r/c oscillator, its frequency is more dependent on the voltage, but not that dependent.

AVRs can work comfortably at 6.24v. If you are really concerned about it, you can put a diode or an led in serial + a resistor to pull down the voltage.


Moderator edit: dhenry was banned for making this post. The quoted figure of 6.24V exceeds the maximum rating of the chip. This is not the first time that dhenry has made completely false assertions. Strikeout added by me. (Nick Gammon)

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