Feeding frenzy

My hunger to shop has just been sated: 2 new Pi Zeros + the new 8 mega pixel camera module + the Zero camera cable + Unicorm HAT and diffuser plate.

Yes, you heard me right, the latest Pi Zeros now have a camera slot.

One Zero is for showing off at the next Cotswold Jam, along with the new higher-resolution 8 megapixel camera module.  Perhaps set up as a tiny onesie cam?

The other is for Zoe – and maybe another camera too, once I’ve overcome the problem with WAPping the latest jessie, the use of which is mandatory if I want to use the new higher-res camera with her purely for FPV videos. ¬†The new camera slot points horizontally which is great for retaining the low profile of the Pi Zero.

The unicorn and diffuser are mostly just for playing with on my main Pi.

Next frenzy will start when they launch the A3 which I’ll be transferring Phoebe to for the extra CPU cores and processor speed needed for the two LiDAR units I’ll eventually be installing.

Until then, I’ll be working on repaying my overdraft!

2 thoughts on “Feeding frenzy

  1. Hey. Great blog!

    I’m programming my own raspberry pi quadcopter right now.

    2 questions:

    Are you controlling each ESC from a standard gpio pin? I found that too noisy, so I’m using a Adafruit PCA9865 breakout.

    And, how do you get rid of all the noise and vibrations the mpu9250 gives? I can’t figure that out.

    Thank you very much

    • I am using gpio pins for ESC PWM. I’m using the RPIO library which provides hardware PWM. I have used the PCA9865 board a long time ago and it worked well, but I swapped to RPIO as it doesn’t need a PCB / breadboard. RPIO works well for me. What does the noise you saw look like?

      What “noise and vibrations the mpu9250 gives”? If you mean the accelerometer, then this is real vibration from motors or props. I’ve done a variety of things: The IMU is churning out samples at 1kHz – I batch them up in tens and average them before processing them. When it comes to using these to calculate angles, I use the gyro and accelerometer merged via a complementary filter and this also reduces noise. I think these are the main two things but also remember to do you best with hardware, so my Raspberry Pi is stuck to the frame with soft foam tape, and the props are carefully balanced.

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