Hardware Wish List
From Paparazzi
main data link over the internet
- I would like to have the main data link over the internet, so it would be possible go get a nearly unlimited range.
A Android Smartphone would be a nice solution.
OSD - On Screen Display
- I'd love to have an OSD to use it connected to the paparazzi CGS. I think will be very usefull for long range manual flights.
Anyone can help to archieve this?
see Video#On-Screen_Display_.28OSD.29
GPS Receiver
- I'd love to see an ultra-compact Sarantel-based GPS receiver Jeremy
- (NOTE: Sarantel http://www.sarantel.com/ makes antennas, no GPS modules, what is wished for is possibly an Opensource PCB layout for a uBLOX LEA-5H and a Sarantel antenna like the uBlox Sarantel reference design)
3.3V Voltage Regulator
- Running a modem on the same 3V supply as the AP can cause significant ADC error and may even reset the MCU. A tiny in-line linear regulator would be great for powering 3V modems from the robust 5V source Jeremy
RE: Try this: http://www.dimensionengineering.com/DE-SW033.htm . Its a 3.3v switching power supply with 1A output (continuous) 1.25A peak output (1 min), Can handle up to 30 volts input. I got one for playing with my lassen SQ gps receiver. Works great.Tuttomenui
LED/Button board
- How about a simple board with a conventional LED on one side and a button on the other? We could make a sort of cradle in the airframe that supports the assembly by the button such that the LED can protrude from a hole in the fuselage and also serve as a button to initiate/cancel launch. Jeremy
output/da
- How about a few extra TPS2051B style outputs (which can be left unpopulated on the board) and/or a handful of straight GPIO or D/A out - as to avoid having to connect into the SPD or I2C bus for something really simple like flashing some lights on the plane.
Servo Disconnect
Because of safety, and reliability, wouldn't it be advantageous to use a relay to switch the control from the microcontroller to the onboard R/C receiver? The use of the 'augmented stability' could use a duplicate wire from the R/C Receiver. I think having a hard switch, controllable from the R/C Receiver should be incorporated incase the microcontroller board, for any reason, loses its ability to direct the servos. - J. R. Skola
R12 Default
The introduction of the ADC resistors is great and the R13 value is smart, but the R12 default value seems to be unusual in that most(?) users will not want to convert from 18 volts. I missed this during the original spec (as I did not pay close enough attention), and ended up with a unit with the defaults, which it turns out are no good for me. Just a tiny niggle really, but worth changing - I'm sure there is a good reason why the R12 default is 15K?
Re: It's impossible to please everybody, so R12 value can be "good" for you but "bad" for somebody else. The only solution for you is to change R12 to match your project. I can change the default value in the BOM, what is the right choice ? (Michel) I agree Michel, I was merely stating that in the admittedly short time I've been looking at Paparazzi, many people seem to be running a reasonably standard set-up involving the Sparkfun Gyro Breakout board. For that board to work, I think R12 needs to be the same as R13. To me this seems like a smart default, but I agree that you can't please everyone!
Air pressure sensor
{Is Solved- Solution is Available}
I think that an air pressure sensor must be added which will record the air pressure before take off, and then compare it to the Gps altitude and store this "0" altitude so in case the gps altitude error becomes very high during flight at least the system will have something to measure altitude directly and compare it with the Gps altitude information. I also think that this sensor will also provide better flight stabilization. I have a plane that i fly without gps but with IAS, rate of descend/ascend, altitude, engine rpm, battery voltage and gps info (only information not control) projected with an OSD module and a high power video tx to my VR googles thus i think an OSD module with information from Paparazzi board would be nice but not essential i agree.
Reply: Would this work http://www.sparkfun.com/commerce/product_info.php?products_id=8128
Reply: This is very good it is also calibrated and temperature compensated so it will need minimum code size. The SCP1000-D11 also has an i2c i/f it is perfect!
Micro SD Card
{Is Solved- Solution is Available} see TWOGALOGGA
I think it would be nice to add a micro SD slot the AP to allow for logging On Board the ap. What do others think?
Reply: I think this would be fantastic. --Corybarton 00:53, 17 October 2008 (CEST)
But a tiny isn't much use without the radio telemetry (except maybe in AUTO1, but even then you need to tune it), and if you have the telemetry you can just dump the stuff onto a laptop...?
Reply: I like this idea because it is extremely difficult right now to get a faster data logging (like 20 hz or 60 hz). The UAV transient response will be useful for controller design. Haiyang
Reply: a micro SD can also be used to store flight parameters if done correctly can also make parameter update in flight permanent . -Torkroll
Reply:Ya this is really nice, i am working on lpc2148 and i am logging my data on Micro SD card. it is faster and i can log data for many hours (2GB card)- Anil
(NOTE: rs232 data to SD card modules exist, these could be connected)
Four Layer Board
{Is Solved- Solution is Available} newer Paparazzi AP board work well without RC interference
With all the RC interference i have been have when moving from the the tiny13 to the tiny 2.11 i think it would be a great idea to go back to a 4 layer board. I mean the savings are pretty minimal but if it gets the RC range of the board back up to par with the tiny13 that would totally be worth it.
Servo headers and ultrasonic altimeter
{Is Solved- Solution is Available} Lisa/M and Lia AP boards, also a breakout connector board is easy to create for TWOG 1 November 2008
I have been thinking this for a long time but i wanted to be sure before i say it. After much thought i think that the pcb for the tiny and twog should change to accommodate 3 pin male headers for the servo connections and not the 3 pin molex. It should make it far easier to connect the servos to the autopilot and this should justify the inevitable increase of the pcb size. Also i think that an ultrasonic altimeter should be incorporated in the general autopilot software (like the "TELEMETER" SRF08 or similar) for easy auto landings of fixed wing aircrafts. Any thoughts? Chris
+1 for the servos definitely, the added size/weight in my view is worth the time/hassle/cost of creating adapters or modifying servos. There is code in CVS for the SRF08, I've got one, I'm going to experiment shortly with it and my Tiny 2.11. Not sure how it hooks yet... -G
REPLY: How about a full daughter board for servos, like a 'shield' if you will. The daughter board would plug into the molex connectors on the servo side of the tiny and convert them into servo headers for those an the ppm so standard servo cables could be used. -NWagner
Reply: I used to agree with you about adding servo headers but in the end the molex ones are so much nicer. Quite seriously it will not make it a ton easier since you have to deal with molex connectors either way. The molex are way smaller and really do get eaier to make once you get the hang of it. I see where you are coming from but i prefer the smaller size. Also you can now buy futaba servos with the same size molex connectors (picoblade) already attached so i would assume it may become a more accepted standard in the rc community
--Danstah
Flat AHRS sensor board
{Is Solved- Solution is Available}
I wish to have a flat AHRS (Attitude and Heading Reference Systems) board as an addon to the GPS. The size should not exceed the TWOG board size and sensors should be interfaced by I2C||SPI bus. The sensors should be integrated using extended kalman filter. The update rate should be around afap Hz (afap=as fast as possible) and there should be some barometric / temperature / humidity stuff.
Partlist:
- Dual Axis Gyro (x,y) - IDG650
- Single Axis MEMS Gyroscope (z) - LISY300AL
- Triple Axis Accelerometer Breakout (xyz) - LIS3LV02DQ
- Compass Module with Tilt Compensation (xyz) - HMC6343
- SHT1X temperature and humidity
- Barometric sensor Bosch BMP085 || SCP1000
/ nuxnu / 2009-03-04 /
PPM Encoder
{Is Solved- Solution is Available} use newer Spectrum receiver, Graupner / JR HOTT have PPM out or Futabe special receivers. The backup RC link and electronic belongin to it is better kept a separate device.
Put Chris Hendrix's ppm encoder on the PPRZ Microcontroller. This would allow for the use of any receiver to be used without modifying it.
--Danstah
UART Protection
After a couple broken UART's and hearing that others have the same problem I think we need to do something to protect the UART from surges or whatever might damage it. I have also heard that these arm7's are very prone to the uarts crapping out (NOTE:, possible, but I've used a dozen TWOG boards and never any issue)
Larger 5V switching Regulator
{Is Solved- Solution is Available} use nice n small BES available nowadays.
I have found that using 3 or more higher power servos and the datalink causes contant resetting of the tiny board due to the 5v regulator only putting out 2.25 A. I think we should use a larger switching regulator. They are out there Example This is really important as digital servos become cheaper and more use them they may have issues.
--Danstah
(NOTE:, if you use high power servos it is possibly better to use a separate power regulator and feed the servo power lines from that, only let the servo pulses come from the TWOG or TINY board. This is the lightes, simples, morst flexible way)
SWITCH BOARD
It will be very useful to have a board with 4 MOSFET switches communicating with Lisa autopilot with CAN. With this board will be possible to turn on & off the power for onboard equipment like video cameras, video transmitters, etc.
I think a Tension of 5V - 12V and current of 1A maximum should be sufficient to almost onboard equipment.
Here is the schematic for the switch board. Please comments are welcome. I'm currently designing the PCB.
Switch Board Schematic (pdf file)
Anyone interested in develop this board?
My e-mail is: azoreanuav(at)gmail(dot)com
