"ACT" Signal on Audio FX Sound Board 2133

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branhamr
 
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"ACT" Signal on Audio FX Sound Board 2133

Post by branhamr »

I am working on an application using the 2133 Sound Board and want to drive a very small motor (less than 100 mA loaded) from the ACT signal. That is, I want the motor to run while and only while a sound is being played and the ACT signal is LOW. I am powering the whole thing from a 3.7V 1200 mAH LiPo. I am simulating a hand-cranked music box.

Has anyone had any experience doing this? I think the simplest thing would be a bipolar switching transistor but I am shamefully ignorant about the various transistor types and their advantages/disadvantages. I would prefer a FET but I don't want to use a separate battery for the gate.

Any thoughts/advice would be appreciated.

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adafruit_support_mike
 
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Re: "ACT" Signal on Audio FX Sound Board 2133

Post by adafruit_support_mike »

This tutorial explains how to control small DC motors with an Arduino:

https://learn.adafruit.com/adafruit-ard ... s/overview

What you want to do is similar, but simpler. You just want the motor to turn on and off, and don't need to worry about controlling the speed with PWM.

The tutorial talks about using transistors to control a motor though.. why use them, which ones to use, and how to connect them.

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