USB Adjustable Boost-Buck Converter Module

As a small adjustable power supply, it's a very good item; I used it to configure the ESP32 C3 boards to understand how well the voltage measurement is set up. In general, I recommend buying it!

boost-buck converter, item arrived quickly, works perfectly, easy to adjust output voltage. I only gave 4 stars because the ferrite core of one of the two inductors arrived chipped (a top part was missing). This defect cannot be attributed to the seller but is definitely due to transportation. I did not request a refund as the change in flow due to the ferrite breakage should not significantly affect the operation of the device. Given the low cost, in the worst case scenario I will buy a new one.

It's working properly.

Shipping and delivery were very fast. The device delivers the voltage as stated in the advertisement and is very easy to use. I measured the voltage with a multimeter and it delivers exactly what is indicated on the display.

It is really a great gadget. It has two coils and the working range is from 0.6 volts to 28 volts. That is more than enough for any my project. Thank you very much and of course i highly recommend this gadget. 👍 👍 👍 ♥️ ♥️ ♥️

Excellent converter with USB input. It has a multi-turn trimmer to regulate the output and digital displays to see the value. Very portable and complete. Satisfied!!

Prompt despatch, but stuck at departure airport for several days and slow final delivery. Well packed, arrived undamaged. Works as described. This device makes an excellent mini bench power supply for small projects. The image shows the way it can be used with a 3d-printed case and knob. The translucent coloured acrylic window provides a useful improvement in the contrast of the display.

The power supply works as expected. Fast delivery.

Works very well

Great, it works very well. The voltage difference is minimal. Ideal for testing projects and trying small components.

Very nice

Ok. Very nice device useful in every workshop if you are considering it I warmly recommend both the product and the seller.

Excellent product, good packaging, recommended seller.

Ok

Just repaired an aftermarket makita 18v battery with this little buck charger. balanced cells to within 00.1 volt at around 700ma, takes some time. potentiometer is around 6 full turns beginning to end so 00.1v increments are achievable for voltage. charger now accepting the battery and charging. looks like aftermarket makita bms's are temporarily not permanently locked. giant middle finger to makita for permanent locks on serviceable battery's. millions of battery's going to landfill that can be repaired. definitely recommend this awesome little buck charger.

Not tested yet but received in good condition.

Excellent USB voltage regulator, 5V input to 3-22V output. Works great and is very practical.

This is the second one I've bought. It's good for low current. Nothing for motors.

Super useful

Fantastic up/down power supply. It can go up to 20v without issue powered by a laptop usb port. How much mah can deliver depends on the 5v input + some losses during conversion. For small appliances like fans is really useful. It can also be used as test bench power supply for low current applications in the range of 0.6 - 26.8v.

All items as described good value. Thanks. I set out for 9v, it works my device light load ok

Product meets description, good option to test prototype circuits. Received after 8 days, thanks!

Excellent for voltage variation, meets its specifications, good price, thank you.