desktop mini power supply

This project is a fork from the Red Mushroom desktop mini power supply. 
Based on this, it is adapted to a potentiometer with a switch and a display with an ammeter. (Added an ugly 3D shell)
It is just a starting project for the members of the laboratory to
make a set by themselves at the cost. It is about 25 RMB.
 
Project description:
A desktop adjustable power supply is a good helper for testing circuits. Making an adjustable power supply can be of great help in debugging the circuit.
This desktop adjustable power supply is very simple, suitable for familiarizing yourself with
the project architecture plan -> [schematic drawing -> PCB proofing -> component welding] -> circuit testing -> (code writing) -> (overall joint debugging)
like this A basic step that can also serve as a warm-up for future big projects.
 
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Project Principle
Principle You don’t need to go into details at the moment. Before that, you can learn about the BOOST and BUCK circuits, what they are used for, and the current flow direction when they work.
If you haven’t learned about BOOST and BUCK circuits yet, I recommend this video to get you started quickly.
 
How to increase the 5V voltage to 12V? Switching power supply BOOST boost principle_bilibili_bilibili
DC 12V to 5V Working principle of switching power supply Basic principle of DC DC step-down voltage stabilizing circuit_bilibili_bilibili
 
What this project uses is added on the basis of BOOST A SEPIC circuit composed of an inductor and a capacitor can not only boost the voltage, but also step down the voltage. In this case, there is no need to use a solution such as BUCK first and then BOOST to step up and step down the voltage, and the cost is very low. Simple peripheral devices and simple structure
 
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Text part
1. Project Description
The modified device
voltmeter
potentiometer
shop is Taobao Uxin Electronics. You can also look for more affordable channels for
3D models.
The main reason is that the voltmeter is too big and the 3D shell may be too big. Strange, I didn’t test
3D. I used Fusion360 to simply draw it. The f3d project file is in the appendix. You can modify it yourself, or make a good-looking
first picture again. I just put some glue on it. It’s quite
efficient and No specific tests have been done on ripple or anything like that.