I've been building a circuit where I'm controlling a motor using a bluetooth module + phone. I've been having some problems, which mostly are fixed (see topic: previous topic).
The main problem I'm facing at the moment is that the DC motor is causing quite some noise on the power line (even if I power the motor directly from V+). I've managed to reduce this by limiting the motor current (using resistor R13) and put in some capacitors + a diode (D3) over the motor. However there is still siginificant noise.
Therefore I would like to know if there is a way to reduce the noise on the power line even more beside having these capacitors and the diode(D3), when the motor switched on (or have additional capacitors)? And what capacitors are best in reducing noise?