Ah. Thanks for clarifying. I have a really good feeling about this now--we had no interference problems two years ago with the bot, and I doubt anyone's looked at that battery since it was built. If that's the issue, you'll forever be my hero.Primate:
I'm not referring to the battery in the robot or the battery that powers the transmitter - the receiver actually has a small battery that powers it. Get the specs for your transmitter/receiver pair (schematics would be even better) and look for a battery in the receiver itself.
Building one is easy. Now building a good one, that's where it gets tough.I wonder how difficult it is to build one of these...
It is hard to imagine what would cause interference with a Spektrum DX5 system. That system is both spread spectrum and frequency hopping so it is very very hard to jam it. I have read some tests done on the two competing 2.4GHZ RC spread spectrum systems DSM2 (used by Spektrum and JR) and FASST (used by Futaba). Both of them tested as being virtually unjamable. In the test I found that even with a very strong 2.4ghz source very close to the receiver neither the DSM2 or FASST system lost control. In the same test several other inexpensive 2.4GHZ systems that did not incorporate frequency hopping did have serious problems with strong interference. It is important to understand that unlike much lower frequency RC systems, 2.4ghz systems have very short wavelengths (on the order of centimeters) and can be blocked by even small pieces of metal that might not block a much longer wavelength signal. Many of the better 2.4ghz system come with either two antennas or even two receivers so that you can put the two antennas in different locations and at an angle to each other. By doing this you greatly decrease the possibility of having your signal blocked by one of your motors, wires, frame or gears or some other piece of metal. It is of course also possible that your opponent could block your signal with some part of his/her sumobot so you may want to place at least one of your antennas near the top of the bot to decrease the likelihood of being blocked.Did anyone else have trouble using 2.4 at states last year? We had some serious interference against Vex bots. Kind of a shame... we had the lamest Vexer take out our custom built bot last year.
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