how to connect amp to speaker to uno

Projects General Guidance
1

Hey guys another noob here, I'm going to get this amp to use with an 8 ohm speaker https://www.sparkfun.com/products/11044
But I'm having trouble visualizing how the speaker and the amp and the uno hook up
Thanks for the help

2

Read the Quickstart Guide. Seems to cover the connections pretty well.

3

Thanks for the advice! but i still have a question, what line level audio? is that on the arudino?

4

stephencampbell:
Thanks for the advice! but i still have a question, what line level audio? is that on the arudino?

No analog line level outputs on an arduino. There are digital outputs and analog input pins.

5

so would I put those in place of the line level outputs? the quickstart guide is confusing me
https://www.sparkfun.com/tutorials/392#gain_resistors

6

Two resistors in series, 10K each.
Arduino to 10K, then 10K to Gnd. Junction to the amplifier.
Signal is divided between the 2 resistors.

Better: 10K potentiometer.
Arduino output on one outer leg, other outer leg to Gnd.
Middle leg to amp. Can lower 5V output as needed.

7

Awesome thanks for the advice! im getting a 10k potentiometer. Would i just not use the In + - header on the amp?

8

Yes, middle leg to +, gnd leg to -.

9

Thanks!

10

I just hooked one up for an alarm clock. I just put the 10K pot right on the board like the quickstart says. It works fine.