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  • 03/04/2022

    This small inverter works very well. However transistors need to be heatsinked if you want them to last and make this unit usable. You can take them out, put both of them on a big heatsink, and then connect their pins back to the board. You can increase the base resistors (1K) to 3.3K to draw less current (about 1A) at 12.7V DC input, and drive nicely a 220VAC 8-10W LED bulb of 740-1000LM, from points A & 2, with good efficiency. If you do not increase the resistors, you can drive bigger loads 30-50W but current and heat dissipation will increase. AC output is from points A & 2. DC output is from points B(+) and D(-). It is advised to connect an 680K resistor and a bypass capacitor 1.1-3.3uF/400V both in parallel to points B & D to smooth out the DC voltage and limit the peaks. Avoid to measure output voltages with a cheap multimeter as you may destroy it. Oscillation frequency is around 4.7-4.8KHz and the waveform produced is as shown in the pictures. I have also drawn its diagram.

    Toon origineel
  • 30/09/2021

    Ürün güzel devre lehimleri iyi kalite normal yalniz Türkiye vergi dilimine giriyo 17 Tl teslimatta ödeme gercekleşiyor

    Toon origineel
  • 04/09/2021

    15 günde aras kargo ile geldi, bu fiyata çok iyi. Akşamları sadece 9-10 W lık led ampul yakmak veya telefon şarj etmek için çok iyi, kamptada aydınlatma ve tel şarjı için kullanılabilir.

    Toon origineel
  • 24/09/2021

    πολύ καλό. ήρθε στην ημερομηνία που μου είπαν

    Toon origineel
  • 18/05/2022

    nice product, good for led bulbs

    Toon origineel
  • 30/01/2022

    Gyors és pontos szállítás! Maximálisan meg vagyok elégedve a termékkel!

    Toon origineel
  • 09/09/2021

    ürünler tam istediğim gibi

    Toon origineel

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