DC power supply (0-30V,0-10A) adjustable, switching power supplies, mini high precision 4-digit display with USB fast charging interface, variable lab bench power supply, output button/encoder knob

Wasn't quite sure what to expect for the price, but I am happy to say I'm impressed! This power supply feels solid and well made and measuring the output with a decent multi meter shows it's also very accurate as well! The USB outputs are super handy and support properly negotiated fast charge too. This thing isn't exactly going to win any desktop PSU of the year awards, but from my brief experience with it I genuinely cannot find a fault with the exception that perhaps the button functions being a bit difficult to make out (just adding a touch of white paint to the engraved labels would have been perfect). But, there's only four buttons and once you know where they are it's a non issue. Quick tip, long press the adjustment knob to turn off the thoroughly annoying beep.

I needed something better than my ancient desktop PSU so thought I'd give this a go. So far so good, checking output against setpoint is less than 20mV difference. It's got a nice way to set the output using a combination of pressing the knob to select the digit and turning it to set the value. As others have said there's a very annoying beep by default every time you touch or turn anything, but instructions in the rear of the manual show how to turn this "feature" off very easily. Fast charging USB port is a nice touch. I checked the current limiting function by stalling a DC motor and it works perfectly. It's a really good looking PSU and very compact, the fan doesn't come on unless drawing lots of power, so most the time it's silent. I love the white display, nice and modern. It's early days, but if it's reliable then a great buy.

Good, clear display, easy to use. Above 5W power draw fan comes on every few mins for a few seconds and it is not a quiet fan... a major annoyance for me. Measured ~80mV pk-pk noise @ 24V 300mA where I'm using it. Beep on button press can be turned off if you read the manual...

A very well engineered product. Nice robust controls and bright display, runs nice and cool. Recommended

Amazing bits of kit; it revived my LifePO4 battery after the BMS went to sleep due to low voltage. I should have just bought this charger to start with it's the same price as a normal charger, but this one is more useful.

Has stood the test of time. (0-30V 10A Model) I have has this for a while now and works reliably, Its got all of the standard features I need, including constant voltage, constant current and current limit (kills the output when the limit is reached). The encoder style knobs make setting simple and accurate. The voltage measurement is very accurate, but I have found the current reading a bit off, particularly at low values - but its not really an issue as Id always take physical current readings if accuracy was important. I have tested the voltage and current through out the full range, it does get warm when full output, but that's not surprising. Most of the time I use this with less than 1/2 Amp. Seen some comments regarding the mains connector but I have not experienced any issue with this. Mine had a uk fused plug top and the plug amd socket at the rear was very secure.

Was initially pleased with the unit which has been used on around 3 occasions but has now unfortunately failed just over 3 months from purchasing. No apparent option to return for a repair or replacement and now out of pocket to the tune of £50 as outside of 30 day return window. Cannot recommend this item due to premature failure after comparatively very light usage.

I bought this (the 10A version) after reading both positive and negative reviews, noting the reviewer who pointed out that many reviews were for free product so I'll say up-front that I did NOT get this for free, nor did I get any incentive to review it, favorably or otherwise. Addressing the criticisms I've seen first, in descending order of importance from my own perspective: (1) Noise: [updated] One reviewer said that the output had noise on it; I checked (off-load) with a 'scope and yes, it does. Fast switching transients, most of it is under 200mV peak-peak in amplitude, with a max of perhaps 400mV peak-peak, at different frequencies. This is quite a bit for low voltage o/p. Switching noise hardly a big surprise on a switching power supply, but because it's very fast transients, it is quite hard to get rid of. As you turn up the output voltage, the spikes don't increase in amplitude but do become more frequent. The manual quotes max ripple (current) of 0.5% and "voltage stability" of 0.5%. The fundamental output voltage seems absolutely rock steady, to be fair, but the noise is relatively fast impulse type noise; while the pattern of successive spikes is some syncopating mix of switching frequencies, in the region of tens of kilohertz, each spike is sharp-edged which means overall it's an episodic pattern of, in effect, very high frequency components. On my 'scope I see a rapidly diminishing "ringing" at about 450KHz, halving in energy every cycle and negligible after about 5 cycles, for each spike, so the 200mV spike lasts about half a microsecond according to my (slowish) 'scope but is probably in reality much shorter, and the ringing is probably on the connection wires. I initially thought that typical decoupling and other load capacitance would soak this up, but the sharp pulse edges instead get everywhere. Linking the -Ve output terminal to the centre ground terminal seems to help. I opened it up to take a look - there are no ferrites in the output wires, nor did I see any chokes near where the output wires leave the main board. I've docked a star because while I like the way it looks and works, I'm going to have to make some modifications to try to reduce the switching noise. (2) Mains cable being loose. I thought the reviewer who said this must have had a dodgy cable. Then I plugged the one supplied in and thought maybe they had a point, but then I realized it wasn't fully home. When plugged in, it feels like it's gone all the way in and is loose. It has another 5mm or so to go - push it firmly past this stiffness and it snugs into place and is nice and firm, at least on my one. (3) Control convenience: A YouTuber bought one of these and complained that when the output is switched on, adjusting the voltage also sets the current display into "entry" mode so it shows the preset current rather than the metered current. It goes back to "live" readings after a couple of seconds hands-off. (To make this clear - you adjust voltage and current with the output switched off and the voltage is what it will output, and the current is the current limit you set. Once the output is turned on, the current and voltage displays go "live", so if the load is drawing less than the preset current, that is displayed, if the load is trying to draw more than the preset current, the current will be close to the preset and the voltage will have dropped to keep current below the preset. If you're within the limit, though, the YouTuber reasoned that the thing should continue to show live voltage and current when adjusted with the output on. That way you can manually adjust voltage to achieve a desired current. For me, this is not a use case I care about - if I want to monitor the current in real time while adjusting the voltage I can just use another current meter, but mostly I'm only interested in setting a current limit that will prevent short-circuit damage. Another control feature is that while the device remembers the presets when you turn the unit off and on or unplug it, by default it always starts in output-off mode. This, to some, is an inconvenience because it means you can't leave it unattended as the sole power of something that you want to be on all the time, because a slight blip in the mains supply will cause it to reset and turn its output off. To me, though, for a bench PSU this is the way I want it to work, especially if there are people around who might have fiddled with the voltage etc while you weren't looking. At work, we have a bench PSU that comes on with the output in whatever state it was when switched off, and a couple of boards have been blown up by people turning it on connected, after someone else has left it set to a high voltage and output on. For me, then, this one works the way I'd want it to. HOWEVER, this feature can be altered via "system settings" - see below. The only other "user interface" thing I think might be of concern to some is the bleep on startup. I actually, unusually for me, looked at the manual to see if this could be switched off, and found somewhat to my surprise that yes it can, there are a number of "system settings" you can get to by a long press (5 seconds) on the output switch. System settings are as follows: 1. Machine ID (see comms) 2. Output state on power-up (so it can come on in "on" or "off" state) 3. Screen brightness 4. Buzzer mute (yay!) 5. Comms baud rate 6. Comms little- or big-endian. The comms features are for an option serial module that allows remote control - again, bit of a surprise, this. Personally, I'm totally happy with the defaults, except perhaps the bleep (though it's not that obtrusive). Features, observations, summary: As others have said, the output voltage seems accurate, certainly by the standards of regular hobby- or professional-grade meters and the like. Someone with lab-standard high-resolution calibrated meters might find something to complain about, but I would consider it "good enough" for any normal purpose. The number of decimal places for the current display might be a bit specious, I daresay it's not actually accurate to a milliamp, but it's not something I care enough about to check. The way it operates seems exactly as I'd like. Sure, they could have done more with bypass capacitors and ferrites and things to get rid of the leftover fast switching noise, but any load you're likely to connect will likely have its own supply caps or not care, or you can take steps to deal with it. The output is WAY more clean and stable than many a typical "wall wart". Neither of the output rails is tied internally to the centre ground connection (which I assume is tied to mains/supply ground). I.e. the output is floating. It's worth noting that the output becomes somewhat smoother if you ground the -Ve side. The output posts are screw clamp types but quite thin and lacking the sideways hole for wires that many of these types of posts have. The external part of the post is only about a 5mm diameter despite having a 4mm hole down the middle to take banana plugs. If that bothers you enormously then I daresay they can be replaced with better posts. (They mount with what look like 4mm screws with nuts on the back and should be easy to change.) The supplied croc-clip cable for the load side is OK but thin, cheap-n-cheerful, I doubt mine will see any use. The unit is light, but not as "tiny" as some reviews suggest - it's not big, though. The dimensions are given in the description. If you stacked six standard DVD boxes together and stood them on their long edge they would be more or less the same size as this unit. I have not tested the over-current protection, nor indeed its ability to supply the rated current. Mine allows output voltage to be set to 31v and current to 10.2A (I bought the 10A version, which at time of writing was about £14 more than the 5A one). The build quality seems really good, and it's noticeably fuller-featured than I was expecting, what with the system setting options and the optional serial comms remote control module (OK, I have no idea how you could get one but I'm willing to bet it'd be easy to hack a DIY one after a bit of a poke around inside. The facility to remote-control up to 32 of these from a single serial interface must be handy for someone!) [update] I have now had a quick look inside to see if extra suppression could be installed, and it's as neatly made as shown in the photos. The earth connection from mains inlet through to the ground post on the front is reasonably convincing, taking in various fairly generous ground planes on the main board via a couple of metal mounting brackets which appear to be meant to also ground the metal case. However, the powder coating on the inside of the case meant the case on mine was not in fact earthed. I scraped the coating off around where one of the brackets sits so that the case on mine is now earthed. When I dismantle it again to try to improve noise suppression, I'll also scrape the case around the other earthed bracket, replace the terminal posts with better ones and probably uprate the output and ground hook-up wires. This review is way longer than I originally intended but overall, I'm pretty impressed with this thing.

Buena fuente de alimentación que cumple con lo prometido. Muy contento

The power supply has an excellent adjustability because it has a rotary encoder, combined with choice of setting which decimal you want to change, although i usually leave it at setting on the tenths. It's also very intuitive and looks nice.

Necesitaba una fuente de alimentación regulable de laboratorio y tras muchas búsquedas y comparativas me he decidido por finalmente ésta. Además tuve la fortuna de conseguirla con un descuento del 20% lo que se traduce en una relación calidad precio inmejorable. Estoy muy satisfecho con su desempeño. Se trata de una fuente de alimentación regulada de tensión continua ajustable y configurable. Puede trabajar en modo tensión constante o corriente constante en función de los requerimientos de la carga de forma automática. Su excelente pantalla de visualización muestra al unísono la tensión, corriente y potencia de salida generadas. Viene con una imprescindibles pinzas de cocodrilo ajustables a los pomos de salida con sus terminales. Como extra que se agradece y es muy útil dispone de un puerto USB de carga rápida de hasta 18W reconociendo todos los protocolos. Hay varios aspectos a destacar que pueden pasar por alto a algunos usuarios. La fuente es configurable. Basta apretar cinco segundos el botón de salida para acceder hasta seis apartados secuenciales de configuración tal como se detalla en en manual de instrucciones. Con el botón de regulación de voltaje vamos presionando y saltando de la lista de configuración y una de las cosas que he hecho es en el apartado 4 dedicado al timbre, eliminar el pitido que trae por defecto en mi caso al girar las botoneras. Cosa que a mí me parecía bastante molesta. Basta con girar el mando de tensión y seleccionar 0 es decir no hay pitido, y una vez llegado al final de la lista de configuración seleccionar pulsando de nuevo el botón de tensión para que se guarden los cambios. También puedes ajustar el brillo de la pantalla entre alto o bajo. Todo está explicado en las instrucciones. Otro punto crucial para el manejo correcto de esta fuente es el citado manual de instrucciones que solo viene por defecto en inglés impreso en la caja pero se puede conseguir sin problema alguno en perfecto castellano. Solo hay que fijarse bien y cuando hayas comprado la fuente al entrar en la ficha de producto junto a donde dice Escribir una opinión aparece un apartado de soporte de producto. Tan fácil como clicar y allí tenéis para descargar el manual de la fuente en español correctamente redactado. Nada de traducciones automáticas. Tal y como demuestro en las fotografías. Las medidas son preciosas medidas como se observa con un multímetro. Un apartado que me tranquiliza es la seguridad de la fuente de alimentación. Dispone de múltiples protecciones con sobretensiones y sobre todo contra cortocircuitos con la función programable OCP. Presionando 3 segundos el botón de regulación de corriente e iluminandose en la pantalla. La fuente es práctica, pequeña y ligera. Y comparada con otras tiene unos acabados y funciones de calidad. En definitiva si buscas una buena fuente de alimentación regulable para tus proyectos de electrónica esta es sin duda una buena opción con una excelente relación calidad precio.

Good product, i have returned it and re ordered higher Voltage 👍

Cihaz kısa sürede müthiş bir paketlemeyle geldi ki, iç içe geçmiş karton ambalajdan başka bir de cihazın kendi köpük korumasıyla nakliye esnasında elinize geçinceye kadar adeta sıfır hasarı garanti ediyor. Cihaza gelince; İlk etapta kocaman ekranı yine büyük parlak digitlerle hemen dikkat çekiyor. Ayrıca cihaz çok sağlam bir metal kasayla oldukça şık ve güven verici duruyor. 0.1V adımlarla 31 Volt'a kadar gayet lineer, stabil ve çökmeyen besleme harika. Amper ayarıysa bu defa 0.01 adımla 10.20 Amper'e kadar ayarlanabiliyor. Seçilebilir kısa devre koruması ve ayrıca ekrandaki ayarladığınız değerleri çıkışa gönderip kesebilen tek tuş olayı çok pratik. Cihaz ayrıca gerekli yerlerde keskin bip sesiyle dikkatinizi çekiyor. Osiloskopla ölçtüğüm ripple seviyesi birkaç milivolt ile göz ardı edilebilir seviyede, yani oldukça temiz bir çıkış denebilir. Çok çok hassas cihazlarda kullanılabilecek üst düzey ve pahalı bir laboratuvar güç kaynağı gibi değildir herhalde ancak, yine de standart elektronik atölye işlerinin tamamına fazla fazla yetecektir. Diğer yandan, oradan buradan modül ve parça toplayıp ucuza güç kaynağı yapmak için uğraşmaya gerçekten değmez çünkü çok uygun fiyata bu özellikteki bir cihazı almak varken boşuna gayret olur. Satıcıya ve böyle kupon ürünleri almamızı sağlayan Amazon'a teşekkürler.