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projects:crazyflie:faq [2013-02-01 14:36] tobias [Why not WiFi or Bluetooth] |
projects:crazyflie:faq [2013-05-21 09:52] tobias [Can't I use a normal R/C transmitter] |
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===== Questions ===== | ===== Questions ===== | ||
- | ==== What radio is used for the Crazyflie | + | ==== For how long can it fly ==== |
- | The Crazyflie is controlled with the Crazyradio. | + | It can fly up to 7min and depending on how you fly it the time will decrease. In a hover test we got it to fly almost 8min but during active flying it flies for about 5-6min. |
- | ==== Why not WiFi or Bluetooth | + | ==== How is it charged |
- | When we where investigating what radio to use, three years ago, we compared several technologies. Here are some of our thoughts | + | It is charged using a standard micro-USB connector commonly used by smartphones. You probably have one of these cables at home. You can charge it from any USB unit that can supply 500mA, most computers |
- | * Wifi | + | |
- | * + High bandwidth | + | |
- | * + Wide spread technology | + | |
- | * + Good range (up to 100-150m) | + | |
- | * - Complex hardware and software | + | |
- | * - Power hungry | + | |
- | * - Can be problems with latency | + | |
- | * - Expensive | + | |
- | * Bluetooth 2.0 < | + | |
- | * + Wide spread technology | + | |
- | * - Short range if using Class 2 device with is common in smartphones etc. | + | |
- | * - Complex hardware | + | |
- | * - Can be problems with latency | + | |
- | * Bluetooth 4.0 low energy (which was not available 3 years ago) | + | |
- | * + Can be pretty cheap (e.g. nRF8001) | + | |
- | * + Low power | + | |
- | * + Potential | + | |
- | * o Not so sure about hardware | + | |
- | * o Might be short range if using smartphones etc | + | |
- | * - Can be problems with latency | + | |
- | * - Low bandwidth | + | |
- | * nRF24L01+ | + | |
- | * + Low power and descent range (up to 100m) | + | |
- | * + Simple hardware and software | + | |
- | * + Low latency | + | |
- | * + Descent bandwidth | + | |
- | * + Cheap | + | |
- | * - Not so wide spread technology | + | |
- | The decision fell on the nRF24L01+. | + | ==== Can I hot swap batteries === |
+ | Yes you can hot swap batteries but you will have to come up with a different fastening then the double sided tape we use. Also you will have to charge them with a stand-alone single cell capable LiPo charger for it to be any idea. | ||
+ | |||
+ | ==== What radio is used for the Crazyflie ==== | ||
+ | The Crazyflie is controlled with the Crazyradio. It uses the [[http:// | ||
==== What is the radio range ==== | ==== What is the radio range ==== | ||
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==== Can't I use a normal R/C transmitter ==== | ==== Can't I use a normal R/C transmitter ==== | ||
- | The e-sky R/C transmitters use the nRF24L01 chip, compatible with ours, so it would be possible to control the Crazyflie using the e-sky transmitters. | + | The e-sky R/C transmitters use the nRF24L01 chip, compatible with ours, so it is possible to control the Crazyflie using the e-sky transmitters. |
==== How durable is the Crazyflie ==== | ==== How durable is the Crazyflie ==== | ||
The Crazyflie is using the PCB itself as the frame. The PCB is made of [[http:// | The Crazyflie is using the PCB itself as the frame. The PCB is made of [[http:// | ||
+ | |||
+ | ==== Can the Crazyflie be used to control a bigger quadcopter ==== | ||
+ | Yes it could. All the key components are there to control a quadcopter of any size. There is yet no firmware support for this though. However imagine having it dockable into a big frame which could carry it a long way and then just release it so it can enter a small area where the big frame can't get, Sci-Fi... | ||