I’m making a drone, and would love if somebody can review my work on the PCB layout.
Image (red is top, blue is bottom, circles indicate holes and side transfers purple is glue):
i.stack.imgur.com/5A7gv.png
What is supposed to happen:
Input from the radios is PWMs 1-6, which is an RF receiver putting in the raw values of the control sticks.
The board is supposed to be able to be programmed via the ICE 10 component.
The MCU is going to be able to take input from the BMI055 (accelerometer) and GPS and validly parse that.
The Li-po inputs are for reading batteries, each wire (besides the first) is a cell.
The aux components are of no concern now.
PWMs 7-12 are the output, and go to a bunch of ESCs, which control the motors.
I feel I’m missing a bunch of passives; the PCB doesn’t look like any other I’ve seen (in the fact that it only has a few resistors and 3 capacitors with advanced components).
Component reference:
GPS: RXM-GPS-R4
MC1: AC32UC3
U2 and U3: Crystals
U1, AUX1, AUX2, all PWMs, U13, and U14: Connectors
REG1: LD1117 (3.3V 800mA)
ACL1:BMI055 3-axis accelerometer
USB: Type B jack
ANT1: GPS antenna
TANTCAP: 33uF tantalum capacitor
Hi robots111,
We can’t really dig in the PCB making regarding your project but you will have to follow the rules from each manufacturer chip/modules you will use.
You might find other user that are making Flight Controllers out of a similar chip ?
Clarification: I’m looking for an electrical component to use in a device that will sense large physical impacts. When an impact event occurs, all it has to do is pull one line high for around a second. There is no requirement it pull the line back down.
I do not want this device tied to outputs from my quadcopter in any way. It needs to be standalone. I understand there are beacons with RF signals one can use for the application I describe, but that’s not what I want. I just want an isolated impact sensor.
I like the reed switch idea below, but was hoping for something a little more off-the-shelf. I’m going to give this a few more days before I pick one of the provided solutions.
Original Question
I would like to know when my quadcopter impacts the ground (crashes). I am going to wire up a buzzer or other noisemaker to make it easier to find the crash site.
I’ve thought about using an accelerometer and I’ve thought about using a piezo sensor,and I don’t know which is better or if there is an even better option out there.
Requirements:
]Pull one pin high for around a second after a crash./:m]
]Be able to survive a small crash and be useful next time around./:m]
]Operate around 5V/:m]
]Be small (yeah, I know this is relative. Let’s say smaller than 2 inches by 2 inches)/:m]
]Be lightweight (yeah, this relative too. Let’s say “not heavy.”)/:m]
]Less then $10 USD/:m]
So the question is: what type of impact sensor best fills my needs? I do have questions about what device to use to make a 99db sound, but that will wait for a different question. At the moment I just want a sensor that I can wire up independent of the quadcopter and have it know when a crash has occurred.
Please point me in the right direction.
