Hello! I have just figured out my first arduino project.. what i want to do is control an 18v DC motor (from an old screwdriver) with a microphone. What im gonna do with this motor is roll up my curtains in my room which activates when my alarm on my cellphone (or alarm clock) goes off in the morning or when i please.
Now to the question: I read some guide on here that said i could use an H bridge to do this.. can i do it in another way?
When i first came to think about this idea i thought of powering the dc with an external power source and just have a transistor in between to control the on and off as thats all i really need.. and to use the microphone input as an indicator of when the arduino powers the transistor which then lets the motor run.
As im new to this i dont really know if that will work.. though with my basic knowledge i like to think that it would work just like that (i thought about having to use an amplifier for the microphone too). So where im going with this is that im unsure whether or not i can do it this way or if i really have to use a bridge? I just want to know if this would be safe for the arduino or if i should do it in another way.
I really appreciate if you guys have any other ideas on how to do this aswell.
thanks in advance! /anton