Quote:
Originally Posted by bojan
Yes... not very good idea, but it works.
Also, there is no proper ground for the rest of electronics, because they used Graetz rectifier directly on mains.. so the "GND" is actually live every 10ms.
Very unsafe practice, actually it is illegal (in Europe definitely, here in Oz most likely).
That also means it is very tricky to debug this circuit as is, to do that isolation transformer is needed (or test gear should float... ).
Or, separate external supply voltages for motor and for driver electronics must be applied.
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Hello Bojan,
Test that kit with RCD!! I bought (for work) a SMD de-soldering kit. The heat-gun keep tripping the RCD till I reduced the heat on the 3rd unit below spec. The mica insulator with fiberglass reinforcement burned thru and keep tripping the RCD. These items from China should not pass testing, and sold without modifications for safety! Check yours before using it!
Mick