DIY laboratory power supply from Chinese modules.
Voltammeter: http://ali.pub/52k0x4
Buck Converter: http://ali.pub/52k180
Multiturn potentiometers: http://ali.pub/52k1ib
Suitable handle: http://ali.pub/52k3gi
Connector + power plug: http://ali.pub/52k1sm
Terminals: http://ali.pub/52k2fd
Plug "Banan": http://ali.pub/52k25g
Crocodile clip: http://ali.pub/52k2nq
LEDs: http://ali.pub/52k3kl

In this video, I showed in detail the assembly of a laboratory power supply unit with voltage and current regulation. The device is assembled from cheap modules from AliExpress.
Regulated power supply is useful for anyone who is somehow connected with electronics. With it, you can check the performance and consumption of any device, find out its currentvoltage characteristic, charge batteries of any type, and generally use it as a universal power supply for everything.
It was based on a Chinese buck converter with two potentiometers to adjust the current and voltage. For the manufacture of the case, I used a junction box, it is cheap and quite practical. The laboratory power supply specifications depend on the voltage and maximum current of the source you are using to power the device.