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  1. wdariusw

    Energy harvesting from solar panel

    Now i'm think that I understand solar cell curves and output characteristics. If load is too high, output is near Voc, if very low, then current is near Isc. My earlier post about IV curves was tottaly wrong.. :) . Buck converter, as i understand now controls output current, and output...
  2. wdariusw

    Energy harvesting from solar panel

    After lot of reading I realize, that is better buy microchip with integrated mppt algorithm and dc-dc converter. Because if i want to get low power consumtion, it is better to have integrated solution, like cymbet cbc915 . If i will try to make my own dc-dc and mppt , lets say, with low power...
  3. wdariusw

    Energy harvesting from solar panel

    Due to poor my english language i can't explain everything as i understand. And you may think, that i do not understand, like you did about mine V vs I curves understanding. Voc is in the right of x axis, where I=0, and Isc is on the top of y axis. That is the current when circuit is shorted...
  4. wdariusw

    Hello everyone !

    Hi Dave. Have some AVR , MSP430 programming, altium designer skils. I love work with IR protocol, like NEC . Have made few project, such as 4x4x4 led cube, 8x8x8 led cube and more. When I have free time - will show and describe my projects with pictures :)
  5. wdariusw

    Energy harvesting from solar panel

    Hi steave . At first - big thanks to you for the answer ! Yes, i understand voltage vs current curves for a solar panel. I think I not everythink understand about the buck converter. You say output power is equal as input power for dc dc? So..if solar output Uoc=7V, Isc=0.33A , maximum power is...
  6. wdariusw

    Energy harvesting from solar panel

    I don't have any circuit yet. I'm collecting info and then will choose components, write program, make pcb etc.. Like in picture, in my final project i want to build as simple as can autonomous wireless sensor transmitter (black squared), and wired receiver for checking what i get. Low power...
  7. wdariusw

    Energy harvesting from solar panel

    Yes, you right here. PWM and buck, maybe buck-boost changes the voltage. Maybe can you give simple example with numbers? I mean... PV output for example 6V 300mA, load is 50Ohm. How should dc-dc converter convert voltage for better power ?
  8. wdariusw

    Energy harvesting from solar panel

    Hi all! I'm doing some work about solar panels, power point tracking, batteries charging etc. Let's say - solar energy harvesting system . I do not understand load maching principle with PWM and buck converter...How buck changes the load depending on PWM ?
  9. wdariusw

    Hello everyone !

    Hello once again! My name is Darius. I'm hobbyist in electronics from Lithuania . I think that this forum is very useful to find some information, and give my opinion to others ! Please do not judge me for bad english language ! :)
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