If you belong to an unpretentious electronics fan and occasionally need an adjustable source of constant voltage or a constant current source, then you can buy this cheap source. It is sold in several modifications and can be bought with a box. The entire power source can be put together from the supplied parts in two hours.
The power source is sold in Chinese e-shops under the names Buck Adjustable DC Constant Voltage Power Supply Module Integrated Voltmeter Ammeter and Constant Voltage current Step-down Programmable converter Power Supply Ammeter voltmeter Module. The box is sold under the name DP And DPS Power Supply Housing 2 Kinds Aluminum Housing Constant Voltage Current Casing Digital Control Buck Voltage Converter Only Box.
The individual modules differ from each other by the maximum supplied current and fineness of the setting. Some make it possible to set tenths of the amp and other thousands of amp. For home use it is enough. You will learn how to use it from the manual in Chinese. It's so easy to understand in a few minutes. Select a constant voltage or constant current, set its value and press the
The only minor flaw is the noisy fan that is still in operation. But you can easily forgive that to power source with an aluminum box for 22 + 16 EUR.