Author Topic: What do you need those resistors'n stuff for?  (Read 1164 times)

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Offline Hackwar

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What do you need those resistors'n stuff for?
« on: February 01, 2013, 10:06:22 pm »
Hey Dave,
now I'm still a bloody beginner, so one of my main questions is: What do I need all those resistors and stuff for in a circuit. Basically, I got an Atmega328 and it says, it would work with 1.something to 7.something volt and then I got a bunch of chips that I attach via I2C or SPI and they have similar power characteristics. Now I have a battery pack of 3.7V, so why couldn't I simply solder the leads from my batteries onto the chip and have a go? Instead there are resistors and capacitors and some more transistors in there and I'm simply wondering: What for? I'm only guessing that it is to control the environment of my IC better, but that is all pretty foggy to me.

If you'd really want to make me happy, you would show how to build a proper battery powered circuit with an atmega328, like a dumbed down Arduino style board.

Thanks!

Hannes
 

Offline mariush

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Re: What do you need those resistors'n stuff for?
« Reply #1 on: February 01, 2013, 10:32:22 pm »
Here's a video that might explain some of the reasons why those pesky resistors are used:






Here's another useful thing you can do with resistors:

« Last Edit: February 02, 2013, 12:17:09 am by mariush »
 


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