DC Power Supply Variable 30V 5A, 4-Digital LED Display, Precision Adjustable Regulated Switching Power Supply Digital with Alligator Leads UK Power Cord （Precision 00.01V，0.001A）.

Purchased to do anodising on aluminium, can't fault it, works perfect and easy to adjust the output

Works perfectly, voltage display very accurate and current limiting works as expected. Very versatile supply

The media could not be loaded. This bench power supply unit represents excellent value for money. 0-30 Volts with 5 Amp capacity for only £50 is amazing. The unit is compact and lightweight due to its use of switch-mode technology. It is supplied with two sets of leads: one set with 4mm banana plugs and crocodile clips for connecting the PSU to the load, and a set of test probes with insulated 4mm plugs, suitable for use with a digital multimeter.The front panel is simple - an on/off button that switches the mains input to the PSU (there is no output switch); a voltage control, which is multi-turn, allowing fine control of the output voltage; a current limit control, which is single turn and therefore not so easy to use; a 4-figure digital volt meter with 10 mV resolution; and a 4-figure digital ammeter with 1mA resolution. All very impressive for the price.As there is no output switch, the load must be disconnected to safely set the output voltage, and the output terminals must be short-circuited to set the current limit. Setting the voltage is easy with its multi-turn control and the displayed voltage agreed closely with my multimeter. Setting the current is fiddly as the control goes from 0 to 5 amps in three-quarters of a turn, and there is also a noticeable lag in its response.What lets this PSU down is that the current limiting action has a very slow response. See the accompanying video. In the video, I have set the PSU to output 12 volts and set its current limit to 0.2 amps. I then connect and disconnect a car tail lamp, which normally draws about 0.38 amps. Watch how long the PSU delivers 0.38 amps before the current is reduced to the 0.2 amp current limit value. My old Farnell bench PSU would respond almost instantaneously in this situation.If this PSU was used to supply an experimental circuit that a hobbyist was constructing, and a mistake was made, the PSU could deliver an excess current for long enough to cause damage before the current limiter engaged!

Great little PSU. Just make sure to set the output voltage with a multimeter calibrated and don’t 100% rely on the leds. other than that fantastic value for money and a nice piece of kit.

I found it impossible to set an accurate voltage. Below 8V even the smallest movement on the dial caused jumps of many volts. Over 8V the best I could achieve was .2v variations. Seems I had a faulty unit so returned.

Power supply stopped working after 1st use. Screen was showing no voltage at all. I did notice though that the power supply is up to 5amp but the fuse in the plug is 10amp so if anything had gone wrong the fuse wouldn't have protected anything.

This bench supply works out of the box and has already been useful for multiple projects.

It's a very nice PSU, but it is sadly very RF noisy. i work on developing SDR's, RF oscillators and amplifiers up into the GHz range, and I am seeing -30db nasties up to and beyond 50MHz.Update: I fitted a T240-45 ferrite toroid to the AC cord and it has reduced the EMI by around 10-12db. I shouldn't have needed to do this.