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saj42

Member since Sep 2020 • Last active Sep 2020
  • 2 conversations
  • 8 comments

Most recent activity

  • in Espruino Work
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    Thanks @Gordon that'll do nicely.

  • in Espruino Work
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    Hi, the contents (as in table of contents) disappear when I look at http://www.espruino.com/Reference with my phone.
    I often have a ferret about when out and about waiting for my daughter.

    Any chance of a tweak to make it more responsive when using smaller form factor devices?

    Thanks.....

  • in Projects
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    Thanks @allObjects....
    At the moment I don't know the maximum watts I will have and to an extent that's the object of the exercise. It's 12v so I guess I may have quite high current at some points.
    I can start small and build....

    Some of the terms are new so I'll catch on eventually... eg high = positive.

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  • in Projects
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    Thanks @AkosLukacs. I'd already investigated voltage dividing.
    I've purchased 2 x INA226 modules so I can get something up and running.

  • in Projects
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    Great thanks for pointing me at the INA219/226 - I've ordered 2 x 226....

    Also thanks for the comment about Arduino 5v shields. Noted.....

  • in Projects
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    Oooooo brilliant thanks @parasquid.
    I've got 15 resistors and created the 225 combinations to see what output voltage I can achieve (easy enough using a full outer join).
    The best voltage was very low eg 2.3v, which felt too low. My assumption; at this stage; is the higher the voltage (below 3.3 of course) the better the data to understanding nuances of battery charge. I may just be over complicating things.

    Now I know I can connect them in series I have loads more option.

    Thanks for the link, I was using https://ohmslawcalculator.com/voltage-diĀ­vider-calculator

  • in Projects
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    Hi, I've got a Pixl.js in the post. I was to use it in my campervan. Initially I want to monitor voltage of my leisure battery but in time also monitor current being drawn. I want to use DroidScript so I can interact with the Pixl via my phone.

    Looking through the videos

    I want to be able to turn devices on and off and off (maybe to conserve the battery). I've got 2 FET transistors on order.

    I'm happy playing round with a bit of electronics but I guess my main interest is writing the code....

    I've got a load of resistors from a play pack I got years ago and I've worked out that non of the combinations I have will divide the voltage from 14v (max voltage on charge apparently) to 3.3v so I can use the Pixl.js to monitor voltage.

    So any thoughts on the following would be very much appreciated.

    1. Has anyone come across / used any shields that may be useful for the voltage / current quandry?

    2. What's the tolerance for reading voltage on the Pixl.js. Just for info as I guess should never go above 3.3?

    3. Has anyone come across a small/cheap electronics starter pack that will contain enough toys to get something up and running.

    It's a balance between getting something up and running and spending time on the electronics side of things (all to do with what floats your boat).

    Thanks in advance.....

  • in JavaScript
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    Thanks... I was wondering which 'side' the battery level would be reading if I connect to 12v leisure battery (ie unregulated).
    That answers my question.

    I'm going to build a simple campervan battery monitor when I receive my pixl.js.

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