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  1. Alec_t

    Wireless charging in PVC tube

    I would expect wireless charging to be possible, but rather inefficient. Couldn't you just have a couple of electrodes passing through seals in the tube wall? An internal diode would prevent battery discharge via the water.
  2. Alec_t

    help with IR2110 chips

    You have no drive signals for Hin and Lin. There should be dead time between the Hin and Lin switching edges to prevent shoot-through, which might otherwise be a problem.
  3. Alec_t

    help with IR2110 chips

    The Ref pin of the 7805 is floating.
  4. Alec_t

    help with IR2110 chips

    Two lower FETs seem to have their source terminals unconnected?
  5. Alec_t

    help with IR2110 chips

    Oops. You're right My bad.
  6. Alec_t

    help with IR2110 chips

    No. Get rid of V1 and connect that InputDC node to V3+ instead.
  7. Alec_t

    help with IR2110 chips

    No, warm :) Attached is a mod to your asc, with more MOSFETs.
  8. Alec_t

    help with IR2110 chips

    I doubt the MOSFETs are limiting current significantly. The main limitation is due to coil inductance. More current generates more heat, albeit distributed differently if you use more MOSFETs to share the load..
  9. Alec_t

    File size limit for uploading attachments

    Thanks both for your efforts.
  10. Alec_t

    12 V lithium battery power supply with motor speed controller

    Perhaps the motor controller needs to detect current drawn by the motor in order to regulate the voltage, and just goes into a standby state when the current stops? Or perhaps the controller is controlling current rather than voltage, and needs to increase voltage when the motor runs?
  11. Alec_t

    File size limit for uploading attachments

    Thanks. But it would be helpful if the site owners could make this info readily and generally available, rather than individual posters having to seek it for themselves from the admins, having experienced failure to upload something.
  12. Alec_t

    File size limit for uploading attachments

    It would be helpful if a 'File size too large' message appeared on screen if posters try to upload a file which is bigger than allowed. If there are instructions anywhere regarding file sizes it is not at all clear where to find them.
  13. Alec_t

    Need Advice for a USB circuit board

    Other types are allowed. If you click on 'Reply' then the 'Attach files' button, then on 'Supported file types' in the resulting dialogue box you'll get a list of types; but there's no mention of file size limits.
  14. Alec_t

    hall effect sensor about help me?

    Without knowing the voltages/currents/magnetic field strengths that the Hall sensor is expected to handle in your particular equipment, how can we tell?
  15. Alec_t

    help with IR2110 chips

    I've never constructed an inverter, but published designs always seem a lot more compact.
  16. Alec_t

    hall effect sensor about help me?

    Welcome to maker.pro! Try this.
  17. Alec_t

    help with IR2110 chips

    If you are switching the MOSFETs at only 50Hz they are unlikely to overheat. Even at 50Hz I think there is going to be a fair amount of EMI generated by switching harmonics, because of those wire lengths and board layout. Trying to switch them at tens or hundreds of kHz (typical inverter...
  18. Alec_t

    help with IR2110 chips

    Hopefully all those long wires won't cause problems if they're handling high frequency voltages/currents. Have you left space for heatsinks on the MOSFETS if they're needed?
  19. Alec_t

    help with IR2110 chips

    I'm not familiar with the Arduino's power requirements, but if it accepts 5V then the 7805 should do the job for it and the IR2110s.
  20. Alec_t

    help with IR2110 chips

    I'd use 5V from the Arduino and 5V for the logic, also read the IC datasheets for the manufacturer's recommendations on decoupling caps. Each IC would generally benefit from a decoupling cap as close to its supply pins as is practicable.
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