Amplifier to DC Motor Speed Controller

[nix2020]

Hi,
I have a pair of old speakers with a 12V power supply. They're meant to be used with a PC. Since they have 12V / 1A power supply input and a volume control, I was thinking maybe it would be possible to re-purpose the board as a speed controller. Anyone have any ideas on the matter? Thanks in advance! Nir

 

[AC Power]

I am no electronics tech, but it is DC....so I'd try it. DC motors are easy to modulate; voltage UP = speed UP, voltage DWN = speed DWN.

 

[nix2020]

I am no electronics tech, but it is DC....so I'd try it. DC motors are easy to modulate; voltage UP = speed UP, voltage DWN = speed DWN.

I guess I'll try it. I wasn't sure about the output voltage/amps of the amplified and I didn't want to ruin the speakers for no good reason, but I guess they're going to the dumpster anyway. Thanks

 

[captainb]

Yes very possible. 12v dc is safe to play, Get some bread board and play around with it.

 

[Markfireeye]

Hi,
I have a pair of old speakers with a 12V power supply. They're meant to be used with a PC. Since they have 12V / 1A power supply input and a volume control, I was thinking maybe it would be possible to re-purpose the board as a speed controller. Anyone have any ideas on the matter? Thanks in advance! Nir

The output to a load speaker is going to be sine wave and will be modulated by the analog input . The waveform will be positive and negative centred around zero. If this is used to drive a dc motor it will oscillate