The test rig now has the buck converter components (MOSFET, Schottky diode and inductor) added to it. A 9 volt battery connected directly across gate and source terminals keeps the MOSFET turned on. In the DC state, these components don't do anything, and I can continue to use the test rig to measure voltage and current.

By Julian

Youtuber, shed dweller, solar charge controller aficionado

7 thoughts on “Mppt solar charge controller #7 – buck converter components added”
  1. Avataaar/Circle Created with python_avatars Hassan Essakhi says:

    sir did you directly attack the MOSFET gate with PWM the arduino ?

  2. Avataaar/Circle Created with python_avatars MrPinkster1 says:

    what's the spec on this capacitor?

  3. Avataaar/Circle Created with python_avatars David Iles says:

    Hi Julian, I am trying to use the PWM file but I am unable to find the PWMcpp file. Please help.

  4. Avataaar/Circle Created with python_avatars Md Nazmul kabir Sikder says:

    Sir ,what's the value of inductance of that toroid that you've used in your circuit?

  5. Avataaar/Circle Created with python_avatars Jenpau026 says:

    sir,..is that arduino??

  6. Avataaar/Circle Created with python_avatars Julian Ilett says:

    Yeah, although I'm starting to think that I'll need a dual trace scope (or even more) as I'd like to watch the inductor voltage and diode voltage and have the oscillator waveform on the screen, all at the same time. My rather basic single trace scope may not be much use.

  7. Avataaar/Circle Created with python_avatars xanataph says:

    When you get your oscillator set up, a scope should be able to tell when you're saturating the inductor, yeah?

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