Review on 💡 Precision Adjustable Regulated Power Supply - KORAD KD3005D by Mark Adlesh

I bought this to replace a large power supply I built in the early 1970's. I liked my old stock because I designed and built it, but mine was rough and didn't have a display. It of course has both voltage and current readings and can be programmed not to exceed the pre-programmed current. Some people seem confused as to how current limiting works. There are two modes. In normal operation, the device always limits the current to the value you set. This is very handy for things like testing LEDs, as you can simply set the current limit to the specified forward current rating for that LED and then power the LED without the hassle of connecting a current limiting resistor. In this mode you can set any voltage, because at any voltage above the forward voltage drop, the diode will cause a short circuit, so the current limit kicks in immediately, limiting the current to say 20mA (typical LED current). Another current limit that requires pressing and holding the current setting knob acts like a real circuit breaker. In this mode, if the current exceeds the threshold you set, the voltage and current will drop to zero and you will need to reset the device. I don't normally need something like this, but if your application requires protection with a circuit breaker, this is useful. The wattage can be programmed so you can adjust it by first pressing the knob and then turning each knob to change either voltage or current. You can also program it so that you don't have to press the button first. As others have pointed out, it's easy to accidentally touch the knob and change the setting, so I liked the idea that nothing would happen if you turned the knob without first pressing it to enter tuning mode activate. Whether you set the required button press first or not, you can hold down the tension button for a few seconds to lock the front panel so you don't make the mistake of accidentally pressing the button. Pencils. One thing I do to give extra reassurance that I don't damage anything by pressing the buttons is that I always press the button a few times when I'm done adjusting the power until I'm in control about the least significant digit. . . So if the knob is changed, I'll probably only change the setting by a few hundredths of a volt or amp. I've done many projects in the month since I bought this power supply and my only regret is that I didn't. get one that's a little stronger. I fixed a simple inverter (to produce 110V from a 12V car plug). After I fixed it I wanted to test it so I plugged in a 40w 110v bulb but it didn't light up. I then did a quick ohms law calculation and found that 40 watts is on the limit of what can be powered, especially with some losses through the inverter. But otherwise I was 100% satisfied with my purchase.