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  1. zega

    US Administration places Tariffs on Solar Panel imports.

    Fair or not, solar tariffs will cost Americans 23000 jobs projected (maybe more). http://www.newsweek.com/trumps-solar-panel-tariff-will-cost-23000-us-jobs-796387 Bottom line ROI math falls apart and people will not install those panels on the roof, businesses schrink. How many jobs saved? Net...
  2. zega

    US Administration places Tariffs on Solar Panel imports.

    I designed a solar system to help a friend (12.8KWp DC) with two Sunnyboy 7KW grid tie inverters, total cost in materials was ~11500$ with freight! Now sunelec.com at the time was selling panels as low as 0.22$/W BUT we could not buy those since all the cheapest panels are reserved for Puerto...
  3. zega

    Audi 389 Miles on single charge

    That extrapolates something roughly like 450miles of driving, without saving (he had lights all the time, AC on, all the stuff on, he was driving 55mph avg 80mph max highway speed and i think is capable of faster-100mph...). For that kinda range you don't need 6 min recharge time, because...
  4. zega

    waste of time. don't bother.

    I had official Lada Niva for 5years, basic ride was nearby 3000ft mountain (Sljeme near Zagreb) once a week minimum... My father had Niva also as his official car on that same mountain, i know Nivas, that have some perks with brakes etc... Basically it is a very robust car with best terrain...
  5. zega

    Do You Like Your Day Job ?

    I love my current job, i have a great boss who is a genius! I'm currently developing scientific instrumentation, designing/prototyping electronic stuff, tons of experience with electronics, machining, lasers, optics, vacuum, superconductivity/cryogenics, magnetics (doing electronics since i was...
  6. zega

    Instant Start 18 fet Infineon Boards are here...

    What i do needs a little bit practice... here goes description for N-type testing. First i discharge gate touching with probes (- or black to gate + or red to source), then i measure drain source both directions, when minus is on drain i got reverse diode 400mV drop, and with plus on the drain...
  7. zega

    Even Newer 4 to 24-cell Battery Management System (BMS)

    I have played with something similar some time ago, and it had the same/similar flaw... In some cases current flow during turn on or some glitch, can run trough TL431 and trough BE path of bleeding BJT, causing too high base current, frying BJT and sometimes TL431... I would add resistor in...
  8. zega

    Building a custom e-bike frame

    HAL kicks ASS :wink: I have seen his work in RL...
  9. zega

    Build your own CD battery tab welder for about $100.00+-

    Huh i am watching this thread very carefully and nemo i am sorry that you burned mosfets so quick... Did you check max avalanche energy that your mosfets can take? Since the resistance of all your copper peaces are so low, the mosfets were taking it all so i advice next time to use a little bit...
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