Interference of camera by motor
 

Hey guys,

I have found that my wireless camera is destructively interfered by the motor of my helicopter, is there anything I can do in order to minimise this effect? If I put a metal sheet above the camera, do you think it can minimise the problem?

I need to hand it my helicopter two days later, could you guys please help me to solve my problems?

Thanks a lot!^^

Adrian

RE: Interference of camera by motor
 

Electric motor i assume... Get it as far away as possible. Shielding it probably would be harder than adding distance. In the case of electro magnetic forces, i believe they exponentially decay with distance, so it should be very effective.

From a nitro/gas motor, just get some foam rubber or something and separate it from vibration.

RE: Interference of camera by motor
 

From what I understand of those small wireless cameras, you may want to consider having another person come with you and point the receiver at the helicopter during flight. Aparently alot of those wireless cams require direct line of sight to get proper reception.

Not saying this is your problem, only a possibility.

RE: Interference of camera by motor
 

adding to what Gorgok said, an electric motor has less radiation from the two ends so placing it directly in line with the motor shaft will help reduce interference.

kc

RE: Interference of camera by motor
 

If you are sure it is RFI (radio frequency interference) and not a range problem there are a few things you can try.

1. Distance

2. Shielding This may be hard, but if it wont make your motor get too hot, put 3 or 4 layers of aluminum foil around it. Be sure it is grounded. You can do this in most cases by keeping some portion of the aluminum foil in contact with the case of the motor.

3. The wires from the speed control to the motor will act as an antenna when a load is presented to them. In order to minimize this you need to set up a choke. Do this by using ferrite beads. You pass the wire through the center of the bead and rap it around 4 or 5 times.

4.Try another camera set up in a different frequency band. If your using 900MHz try 1.2Ghz… if you can find one, a 49MHz one would give you the best range with less power, but the antenna is long and you may end up with other interference problems.

I you have any amount of antenna or RF knowledge, you may consider building a directional yagi beam for the receiver and have a friend point the antenna at the bird while you fly.

I hope this gives you some help…

Good luck.