Najlepsza pozytywna recenzja dla zabawki rc, sport rozrywkowy, moda, popularna elektronika na Banggood

29% OFF Mały wzmacniacz Dwukanałowy zestaw głośników audio TDA2030 Mini elektroniczny zespół części do produkcji DIY US$31.99 US$44.99 View It

Ogólnie:

falc 17/09/2018

This was give to my grandson to practice electronics ie identifying components, and soldering.... The track lifts and breaks very easily and is a bit of a nightmare. After I fault found the track breaks, it did work, but with a loud hum! which defeats the object. The -15V rail is pulled down to -5VDC and has a 50Hz ripple on it! as the the only the amplifiers and the LED indicator are on this rail, is this the fault of the mains transformer or design?

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