Difference between revisions of "FPV"
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To build a reliable platform I want to begin with the fundamental basics and then extrapolate more specific products. | To build a reliable platform I want to begin with the fundamental basics and then extrapolate more specific products. | ||
# Lower frequency will allow greater range and require larger antenna | |||
#* Higher frequencies will quickly get attenuated by the atmosphere | |||
# One energy-source, single set of batteries | # One energy-source, single set of batteries | ||
#* Minimized weight, as batteries contribute as the heavies components | #* Minimized weight, as batteries contribute as the heavies components | ||
Revision as of 14:38, 14 January 2011
Flying electronic RC planes from the ground is fun. Piloting a FPV plane from First Person View is really cool. With the arrival of light and powerful video stream transmitters and long range remote RC transmitter modules , the range of flight has increased from line-of-sight to an order-of-magnitude wider.
Research
To build a reliable platform I want to begin with the fundamental basics and then extrapolate more specific products.
- Lower frequency will allow greater range and require larger antenna
- Higher frequencies will quickly get attenuated by the atmosphere
- One energy-source, single set of batteries
- Minimized weight, as batteries contribute as the heavies components
- Parallel 3S 11.1V Lithium-ion Polymer batteries, both on plane and ground station
- Prevents voltage drop if one cell is bad
- Power- and signal-wiring separated as much as possible
- Noise from motor can degrade digital signals if coupled with signal-wires
- Shielded components and twisted wires to eliminate noise and oscillation
- Minimize both ambient noise and interference from nearby components, think of a long wire as an antenna
- Frequency of video-transmitter on a higher band than RC-transmitter
- Lower frequencies will have longer wavelengths that propagate further
- Video-transmitter, as well as RC-receiver, powered by 5V voltage from main Lipo-batteries
- When the main engine batteries are drained, for 3S the low voltage limit is 9.6V, the rest of the system can still function
- Clone aileron servo signal to use two servos per wing
- Prevent loss of control on servo failure, must be mounted close together to drive force-drive the dead servo, might drop this
- Proper cooling of video-transmitter using an appropriate heat-sink and thermal-adhesive
Gear
Video system
- Lawmate - Range of different models
- EagleEyes
- Immersion RC Duo 2400 diversity receiver
On-Screen Display
- ImmersionRC EzOSD
- ET
- DOSD
Goggles
- Fat Shark RCV230T/922T Teleporter - All-in-one, limited 320x240 resolution and range [1]
- Fat Shard RCV922 Aviator - Video input, 640x480 resolution, Vin 6-12V [2]
Control system
Radios
Transmitters
- ImmersionRC EzUHF transmitter - Module connects to trainer-port on radio, 433 MHz frequency, 200mW or 600mW power-mode
Receivers
- ImmersionRC EzUHF receiver - 8-channel receivers, diversity signal/dual antenna
Other
- ImmersionRC EzAntennaTracker - Uses GPS-coordinates from EzOSD inserted in the right audio channel
Planes
- Ritewing Zephyr - Foam wing base
- Multiplex Easystar - Simple glider-plane [5]
- ParkZone Radian PNP - Glider, prop in front, huge easy to spot [6]
- EasyStar - Cross between glider and sport plane, 3-channel, easy to modify [7]
Other
Motor
- Hacker A30-L
Batteries
- Turnigy S3 2200 mAh
Charger
- Bantam BC-6 - Korean, high quality
