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I’ve needed a decent, variable bench power supply fro some time. So I decided that creating y own would be a great idea, I can customise what features I want, and it actually works out more cost effective. My PSU needed to have various features including a high current output, and a variable voltage output. Like most of my projects, I followed the systems development life cycle to plan and create my PSU. In doing this I can cover all the needed features and have good documentation to aid me along the way.
As this is one of my own personal projects, I have the luxury of a deadline that’s not set in stone. This will allow me to ensure that the end product is of great quality, meets the specifications needed and works well. I don’t want to spend more that £20 on this project. This project doesn’t need to be too advanced, the components are cheaply sourced and the chassis will be 3D printed. To make the project easier, I’m going to try and source various an all-in-one component for the more advanced features. For example, I’ll use voltage display modules and Boost/Step down converters instead of voltage dividers and complex voltage detection circuitry. This will help save time and will probably work out more cost effective on the long run.
Analysis and Specification:
My current solution involves tapping into my 3D printers 12V 30A power supply, which works okay but I’d prefer a sperate piece of equipment, I also need to have the ability to work at different voltages to use different components and fix old electronics. To meet the above conditions, I have devised the following specification;
Design and Project Development
24V 10A PSU Dimensions (terminals facing left): X = 19.7cm Y = 11.1cm Z = 4.85cm
Binding post: Binding screw shaft= M4 (4mm) Head= 11mm
Potentiometer shaft diameter = 6mm
Implementation and Testing
SDLC from : 'https://www.cheatography.com/uploads/nataliemoore_1432996444_SDLC6.jpg'