athrun02151
05-24-2012, 06:11 AM
Hi there,
Not sure if i'm posting this to the right place, or if this has been covered, sorry if it has been.
I'm currently working to convert a Master Replicas Darth Maul from running off 3 x aaa batteries to using a DC adapter for display(not on all the time).
The problem I'm having is that I'm getting noise kinda like audio amp motorboating.
The way I'm setting this up is that I've got wires soldered into the battery pack, so the speaker is still in there (drilled grooves for the power cable). I then am using a 12vdc adapter stepped down to 4.0v (using a resistor for now until proper voltage regulator arrives in post).
I'm not sure if it's because the current needs filtering? Or if it's something else. I've tried laptop power bricks after limiting the voltage and current, but still same problem. Can't hear any of the normal saber sounds, just motorboating. It's a mrfx board I'm trying to power.
Any help would be appreciated!
Thanks
Not sure if i'm posting this to the right place, or if this has been covered, sorry if it has been.
I'm currently working to convert a Master Replicas Darth Maul from running off 3 x aaa batteries to using a DC adapter for display(not on all the time).
The problem I'm having is that I'm getting noise kinda like audio amp motorboating.
The way I'm setting this up is that I've got wires soldered into the battery pack, so the speaker is still in there (drilled grooves for the power cable). I then am using a 12vdc adapter stepped down to 4.0v (using a resistor for now until proper voltage regulator arrives in post).
I'm not sure if it's because the current needs filtering? Or if it's something else. I've tried laptop power bricks after limiting the voltage and current, but still same problem. Can't hear any of the normal saber sounds, just motorboating. It's a mrfx board I'm trying to power.
Any help would be appreciated!
Thanks