2023-03-07 - Clarity on Electrical Components on Comp Frame
Update the title with the “name of change' after the dash
Change Description <Filled out by requestor>
ICARUS
Electrical component clarity
Anthony Luo
discontent rain #2208
Description of Change
TLDR: I’m going to tell you what sensors are going onto the drone, and where they need to go, and what they are going to connect to. This is going to need a lot of work and love to clean up properly, and also (probably) a few follow-up RFC’s (or edits to this page) from mech & ee on connector standardization && mounting clarity.
Implementation
unless otherwise specified, refer to the Pixhawk wiring standard for our holybro px6 baseboard here: Pixhawk Baseboard Ports - Holybro Docs
All transmit / receive modules (RF Modules henceforth) including the VTX & the RFD900X must be mounted such that there is adequate airflow over the device.
it is not necessary to mount them outside of the cabin/airframe, provided there is enough ducting/ventwork on the body to allow air to circulate over the heatsinks.
Care must be taken that antennas are always connected first, before applying power.
There will be 1 more GPS module from the competition organizers that must be mounted, this can be placed on the rear horizontal stabilizer or on a wing. We do not know the exact shape/size until we get to competition.
Video System (to VTX - ) MAR 18
1x VTX either RMRC 800mW (arch doc) or mateksys 1.3 ghz (Video Transmitter 1.2/1.3GHz, VTX-1G3SE – Matek Systems)
1x analog video input from mini OSD
1x coax out to antenna
12v power this is a hard requirement.
needs to have some amount of airflow over heatsink.
must be mounted with channel number up.
2x Caddx Baby Ratel 2 1200tvl (arch doc). Analog video output to video mux switch
one mounted on the front of the drone. Ideally -30 to +30 from horizon adjustable, minimum requirements -10 to +20 degrees. (This needs to be set once, before we take off).
one mounted on the bottom of the drone, centered w/landing gear as much as we can. At least center left/right. Ideally adjustment +/- 10-30 degrees (same as front facing camera rig is ok). Mounted flush with the fuselage is also ok.
takes 4-36V but probably give it 12?
1x video mux switch (arch doc)
PWM control from ZP3
for the 18th, likely that this will be setup with ardupilot.
2x analog video input from the cameras
1x video output to mini OSD
takes 5-26v MUST BE SAME AS CAMERAS (prolly 12?)
mini OSD holybro micro osd v2 (Holybro - Micro OSD V2 - Camera & FPV from 3DXR UK)
TELEM from PX5/6 (see product page)
video in from video mux switch
video out to VTX
power, I believe, is 5V from the telem port, NOT VCam
1x singularity 1280 side exit (arch doc)
mounted on the rear horizontal stabilizer.
RF Comms (to RFD900x) 11th
1x RFD900x 11th
coax to one dipole antenna, either attached directly to the rfd900 or mounted in tailcone.
coax to one singularity 868 antenna mounted on nosecone. cylindrical axis perp to the ground.
uart to ZP for comp, to PX5/6 for testing
PPM to ZP for comp, to PX5/6 for testing
power from ??? → needs 5v
heatsink mounted w/some amount of airflow over it.
UART between ZP & PX5/6 for comp Apr 8
PPM between ZP & PX5/6 for comp APR 8
1x dipole antenna mounted in tailcone or on rfd900 (ideally tailcone w/extension? or we just drill a hole through the top of the drone and stick a dipole out that’s funny too) MAR18
1x singularity 868 in nosecone cylindrical axis perp to ground.
PX5/6 Peripherals (to PX5/6)
CAN to HereFlow OFS mar 18
mounted bottom of frame
PX5/6 itself mounted center (or close to) of frame. Current arch doc sol’n is ok. mar 11
note to mount it away from EMI as much as possible.
GPS2 UART to NEO M8 GPS mar 11
GPS2 port → see current mounting
mount on wing, inset slightly but facing up
wired direct to px
I2C to TFMINI-S Micro Lidar Module (Benewake TFMINI-S Micro LIDAR Module I2C (12m) - RobotShop) mar 18
mounted bottom of drone, beside hereflow/pilot cam/mateksys ofs
Wired direct to px
TELEM to ZP apr 1
TELEM to Micro OSD mar 18
TELEM to LTE/433 apr 1
undecided ATM but either dragonlink 433 w/short antenna OR
LTE link from nathan OR
separate 433 mhz telemetry link gg
i2c to 1x airspeed sensor, digital (hapyymodel see arch doc) mar 18
this can realistically be placed on ZP or PX, but since PX is doing the fly-by-wire, it seems better to have the more accurate airspeed linked to the PX.
fine to stick out the nosecone of the drone.
we may need to buy another airspeed sensor since the one we have isn’t directly supported
ZP Peripherals (to ZP3) apr 1
uart to Vectornav vn300 (uart)
refer to arch doc for mounting requirements.
uart to Mateksys Optical flow sensor (see arch doc)
beside Hereflow OFS on bottom of drone
Analog airspeed sensor (idk where).
spi to SD card thingamabobber.
GPIO/PWM (unclear) Output to LED’s
PWM Output to Video MUX
input from Arm/Disarm (TBD)
PWM out ? ? ? to Buzzer (TBD)
comms to tx2 (uart)
comms to px5/6 (uart)
TX2 Peripherals (to TX2) apr 8
cv camera (arch doc)
comms to ZP3 (uart)
Reason for Change
Working towards structuring everything properly for comp frame
Priority
High
Impact of Not Responding to Change
I’ll let daniel handle this.
What Groups, People, Sub-teams Need to be Notified?
Change Impact <Filled out by requestor>
Additional Parts/Resources Required and Costs
Impact on deadlines
Alternatives and Recommendations
Comments
Make sure to create a thread in the ‘rfc’ chat in discord (here). Share a link to your rfc in your post so it can be approved!
Change Request Sign Off <System Integration>
Status
Accepted
Comments
Signatures/Name
Anthony Luo
Pikachu45