Society of Robots - Robot Forum

Electronics => Electronics => Topic started by: Afroman on December 16, 2009, 05:25:58 PM

Title: Amplifier tutorial
Post by: Afroman on December 16, 2009, 05:25:58 PM

Hey guys

I just got done making a tutorial that attempts to squeeze a few weeks worth of university into 5 minutes. Thought you might be interested in seeing it. I cover non-inverting op amp amplifiers and show you a practical microphone amplifier circuit. How is this relevant to robotics? Well... lets say you have a sensor that only puts out tiny analog voltages, and you want to connect that to your robot's microcontroller's ADC. Instead of pulling your hair out working with a range of 50mVp-p, you could use an amplifier to increase the signal to 5Vp-p, which would use the full range of your ADC, making it easier to process the signal.

http://www.afrotechmods.com/groovy/amplifier_tutorial/amplifier_tutorial.htm (http://www.afrotechmods.com/groovy/amplifier_tutorial/amplifier_tutorial.htm)

Title: Re: Amplifier tutorial
Post by: Razor Concepts on December 16, 2009, 05:52:59 PM

Thanks for the tutorial!! (admin posted it in videos section too  :D )

It would be great if you could make another tutorial with more output stuff, like how to get rid of the negative voltage or smooth the output voltage out, etc.

Title: Re: Amplifier tutorial
Post by: Afroman on December 18, 2009, 12:48:41 AM

Hmmm what negative voltage?
I am thinking about doing a quick tutorial on passive filters, so that may be what you mean by smoothing the output voltage out.

Title: Re: Amplifier tutorial
Post by: z.s.tar.gz on December 18, 2009, 12:06:36 PM

Great tutorial! I lol'd when the cat stated eating the mic.