Comments on: Types Of Radio Control Cars http://www.davesrctracks.com/2009/07/types-of-radio-control-cars/ Remote Control Car Talk Thu, 01 Jul 2010 05:01:42 -0700 http://wordpress.org/?v=2.8.6 hourly 1 By: Meggles http://www.davesrctracks.com/2009/07/types-of-radio-control-cars/comment-page-1/#comment-850 Meggles Sun, 05 Jul 2009 02:47:44 +0000 http://www.davesrctracks.com/2009/07/types-of-radio-control-cars/#comment-850 By: black leopard http://www.davesrctracks.com/2009/07/types-of-radio-control-cars/comment-page-1/#comment-849 black leopard Sat, 04 Jul 2009 21:04:31 +0000 http://www.davesrctracks.com/2009/07/types-of-radio-control-cars/#comment-849 Have you looked at casein? Alternately there is a latex based powder that you mix with water- pour into mold and it sets in about a day - used for sealing and levelling floors before tiling but I've seen it used to make non-standard size shower trays. It's a bit heavy and I'm not sure that the mechanical properties will be what you want. Other than that : resin and fibre glass mat? Have you looked at casein? Alternately there is a latex based powder that you mix with water- pour into mold and it sets in about a day – used for sealing and levelling floors before tiling but I've seen it used to make non-standard size shower trays. It's a bit heavy and I'm not sure that the mechanical properties will be what you want. Other than that : resin and fibre glass mat?

]]> By: han http://www.davesrctracks.com/2009/07/types-of-radio-control-cars/comment-page-1/#comment-847 han Sat, 04 Jul 2009 18:58:11 +0000 http://www.davesrctracks.com/2009/07/types-of-radio-control-cars/#comment-847 Safe? Yes. Recommended? No. Here's why: The 2700 and 2500 mAh batteries are so close, you'll never notice any difference unless you apply scientific testing methods to measure it. But the 1300 mAh batteries will wear out in roughly half the time. Once they're down, the others won't matter. Think of it like a team of horses pulling a load. It's not going much of anyplace if two of the horses are tired out and lying down. Also, older batteries tend to wear down faster than newer ones, so you want to avoid mixing those, either. Still, there is nothing unsafe about doing so. Most importantly, try to keep your mAh ratings within 10% - 15% of each other to get the longest usage before having to recharge. Safe? Yes.
Recommended? No. Here's why:
The 2700 and 2500 mAh batteries are so close, you'll never notice any difference unless you apply scientific testing methods to measure it. But the 1300 mAh batteries will wear out in roughly half the time. Once they're down, the others won't matter. Think of it like a team of horses pulling a load. It's not going much of anyplace if two of the horses are tired out and lying down.

Also, older batteries tend to wear down faster than newer ones, so you want to avoid mixing those, either. Still, there is nothing unsafe about doing so. Most importantly, try to keep your mAh ratings within 10% – 15% of each other to get the longest usage before having to recharge.

]]> By: John B http://www.davesrctracks.com/2009/07/types-of-radio-control-cars/comment-page-1/#comment-845 John B Fri, 03 Jul 2009 19:11:38 +0000 http://www.davesrctracks.com/2009/07/types-of-radio-control-cars/#comment-845 Lithium would be my first choice. If Lithium is not available then I would see if I could get Nickel-Metal Hydride (NiMH) though not as good as Lithium it is better than Nickel-Cadmium (NiCd). With Lithium you get full power until the battery is depleted, You are also able to charge them at any point and leave them on the charger. NiCd has a memory so you have to deplete the charge all the way (or really low) before charging or it will shorten the usage because it will think your last charge point is the depleted point. As for the RC longevity logically I would think the plain would use less battery because of it's gliding. Though I have no personal knowledge of this. Sorry. Lithium would be my first choice. If Lithium is not available then I would see if I could get Nickel-Metal Hydride (NiMH) though not as good as Lithium it is better than Nickel-Cadmium (NiCd). With Lithium you get full power until the battery is depleted, You are also able to charge them at any point and leave them on the charger. NiCd has a memory so you have to deplete the charge all the way (or really low) before charging or it will shorten the usage because it will think your last charge point is the depleted point. As for the RC longevity logically I would think the plain would use less battery because of it's gliding. Though I have no personal knowledge of this. Sorry.

]]> By: Gen. Tempest http://www.davesrctracks.com/2009/07/types-of-radio-control-cars/comment-page-1/#comment-848 Gen. Tempest Thu, 02 Jul 2009 23:14:21 +0000 http://www.davesrctracks.com/2009/07/types-of-radio-control-cars/#comment-848 1. A toggle switch on the Tx will move a servo on the appropriate Rx channel from one end of its travel to the other. Useful for undercarriage. 2. This is exactly what the motor controller does. If you want a DC voltage related to the Tx controller position, put a brushed motor controller in the appropriate channel. The top voltage will be the voltage of the battery you are using, which can be considerably more than the fraction used to supply the receiver. 3. See 2. The motor controller receives the voltage supply from the battery, and supplies the receiver through the cable to the receiver channel. 4. Servos will actuate movements in the robot. If you are looking for feedback from sensors in the robot you are entering a whole new region of electronics, since most enthusiasts solve this by programming microcontrollers. One final note: some aircraft RC frequencies are not licensed for ground or water vehicles, including robots. Check your local regulations. 1. A toggle switch on the Tx will move a servo on the appropriate Rx channel from one end of its travel to the other. Useful for undercarriage.
2. This is exactly what the motor controller does. If you want a DC voltage related to the Tx controller position, put a brushed motor controller in the appropriate channel. The top voltage will be the voltage of the battery you are using, which can be considerably more than the fraction used to supply the receiver.
3. See 2. The motor controller receives the voltage supply from the battery, and supplies the receiver through the cable to the receiver channel.
4. Servos will actuate movements in the robot. If you are looking for feedback from sensors in the robot you are entering a whole new region of electronics, since most enthusiasts solve this by programming microcontrollers.

One final note: some aircraft RC frequencies are not licensed for ground or water vehicles, including robots. Check your local regulations.

]]> By: Steven http://www.davesrctracks.com/2009/07/types-of-radio-control-cars/comment-page-1/#comment-851 Steven Thu, 02 Jul 2009 15:39:43 +0000 http://www.davesrctracks.com/2009/07/types-of-radio-control-cars/#comment-851 By: David G http://www.davesrctracks.com/2009/07/types-of-radio-control-cars/comment-page-1/#comment-844 David G Thu, 02 Jul 2009 04:50:15 +0000 http://www.davesrctracks.com/2009/07/types-of-radio-control-cars/#comment-844 It isn't that simple and first you must be able to get the exact replacement part. If it is a name-brand, you may be able to. Try Pacific Coast Parts in California as they are the official parts outlet for most major brands. There may be some soldering involved. You may get lucky and have a plug. It isn't that simple and first you must be able to get the exact replacement part. If it is a name-brand, you may be able to. Try Pacific Coast Parts in California as they are the official parts outlet for most major brands.

There may be some soldering involved. You may get lucky and have a plug.

]]> By: Ruby http://www.davesrctracks.com/2009/07/types-of-radio-control-cars/comment-page-1/#comment-846 Ruby Thu, 02 Jul 2009 04:29:43 +0000 http://www.davesrctracks.com/2009/07/types-of-radio-control-cars/#comment-846 no, magnets are not damaged by radio signals or by electronic components. but your next sentence asks something different. "Will the magnets or the "hover car's" electric engine be damaged by being in close contact (with the other magnets) ?" it's an electric motor. but probably not. while a weak permanent magnet can be modified by a stronger one, it appears that the distances are too big for this to happen here. . no, magnets are not damaged by radio signals or by electronic components.

but your next sentence asks something different.

"Will the magnets or the "hover car's" electric engine be damaged by being in close contact (with the other magnets) ?"

it's an electric motor. but probably not. while a weak permanent magnet can be modified by a stronger one, it appears that the distances are too big for this to happen here.

.

]]> By: michael.hendricks http://www.davesrctracks.com/2009/07/types-of-radio-control-cars/comment-page-1/#comment-843 michael.hendricks Thu, 02 Jul 2009 04:24:08 +0000 http://www.davesrctracks.com/2009/07/types-of-radio-control-cars/#comment-843 the bigger the mhz number the longer the battery lasts and the more power you will get the bigger the mhz number the longer the battery lasts and the more power you will get

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