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» WW2 mini sub build
DIY pitch controller EmptyFri Sep 30, 2022 12:17 pm by SimonH

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» Choice of CAD software and Printer for 3D printing
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» 915mhz / 868mhz as a viable frequency for submarines.
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» Grantham Model Sub Day, Sunday 14th August 2022
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    DIY pitch controller

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    tsenecal
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    DIY pitch controller Empty DIY pitch controller

    Post  tsenecal Fri Apr 22, 2022 5:34 am

    Ran across this video on youtube... thought it might be interesting... i have enough arduinos laying around that i might give this a try...

    https://www.youtube.com/watch?v=gG0X_yIP1oQ

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    david f
    david f
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    DIY pitch controller Empty Re: DIY pitch controller

    Post  david f Fri Apr 22, 2022 11:39 am

    Nice job but his $5 build price looks like an underestimate in current circumstances!
    (Farnell quotes £8.50 just for the MPU-6050 chip.)
    David
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    tsenecal
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    DIY pitch controller Empty Re: DIY pitch controller

    Post  tsenecal Fri Apr 22, 2022 3:12 pm

    david f wrote:Nice job but his $5 build price looks like an underestimate in current circumstances!
    (Farnell  quotes £8.50 just for the MPU-6050 chip.)
    David

    yep, one of my favorite go to places has them on a breakout board for $7.00, but another has them for $32!!!

    I do have a drawer full of arduino micro pros...   i am thinking that i might give it a try when i get some free time.  the nice thing about DIY is that i can add features that no-one else seems to think are important.


    To be honest, the most interesting thing i got from that video was the arduino "ServoInput" library. I never knew that existed, it would clean up quite a lot of my different projects, it should reduce the amount of code i have to write by about 40 lines.

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    C-3PO
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    DIY pitch controller Empty Re: DIY pitch controller

    Post  C-3PO Mon Apr 25, 2022 1:15 pm

    david f wrote:Nice job but his $5 build price looks like an underestimate in current circumstances!
    (Farnell  quotes £8.50 just for the MPU-6050 chip.)
    David

    GY-521 3 Axis Accelerometer Gyroscope module for Arduino MPU-6050 @ Cricklewood Electronics = £3.00 ex delivery - I guess they have not revalued their stock...

    https://www.cricklewoodelectronics.com/GY-521-3-Axis-Accelerometer-Gyroscope-module-for-Arduino-MPU-6050.html

    Regards
    Jonathan

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    C-3PO
    C-3PO


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    DIY pitch controller Empty Re: DIY pitch controller

    Post  C-3PO Thu Apr 28, 2022 9:56 am

    The following may be of some use - if nothing else it might save you from a few more grey hairs!!!

    Unless I have picked up the wrong end of the stick completely - it appears that some of the main core mpu6050 Arduino libraries do not work without an amendment to the code.

    I admit this seems very odd ....

    You can only communicate with the mpu6050 once it has been "woken up" which you do by set the " PWR_MGMT_1 register" to zero

    Code:
    Wire.beginTransmission(MPU_addr);
    Wire.write(0x6B);  // PWR_MGMT_1 registe
    Wire.write(0);     // set to zero (wakes up the MPU-6050)
    Wire.endTransmission(true);

    I spent ages with the main mpu6050 library from github and assumed I had a dead chip when nothing worked. I then downloaded another library (mpu6050 light) and the device sprung into life immediatley.

    Libraries
    Struggled with this one without amended code - https://github.com/ElectronicCats/mpu6050

    This fired up first time - https://github.com/rfetick/MPU6050_light

    Hope this may be of some use

    Regards
    Jonathan

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