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I received the powers supply packed in good condition electrostatic pouches ahead of schedule I thank Banggood for the good service
EU five days delivery including weekend. Looks and works decent came individually antistatic packaged
fast delivery product good as per order
I am using these as energy-saving voltage reducers. There are two kinds of noise at the output: HF ringing from digital switching, and voltage ripple. I get rid of the ringing noise using a 8mm diameter ferrite ring with 3 turns of wire both plus and neg output wires. I get rid of voltage ripple with 78XX or LM317 linear regulators. The modules are rated 50 mV ripple, but my noise is much less than that - too low to measure on my O'scope. Basically I have a 26V 1Amp supply from a transformer, and from that I want to provide +Variable voltage, +12 Volts and +8 Volts at as much current as can supply, and for these supplies to be short-circuit protected. To do so I use 3 modules, 3 ferrite rings and 3 linear regulators. Success !!
Excellent for adjusting the current. Use to compensate for dry batteries
Okay, all delivered in order and functioning. Quick delivery.
Very good quality and useful for many applications
The inductor core is not correctly sized: it becomes super as soon as current goes above 1.5A Placing another inductor is recommended Otherwise work OK
Everything OK.