Most of the things I create are software, so I download the tools that I need from the Internet. Believe it or not, most of these things tend to be free. Many computer scientists release their projects as Open Source, which means you can have the tools and all the code it was written in and it costs you nothing. This is one of the things I really like about computer science. It’s all about a giant global community working together and sharing information purely for the sake of learning more about computers.
Some time ago I got a Raspberry Pi Zero – this is a very small computer but without screen, keyboard, etc. I wanted to make it a nice and cool mini computer so I bough different components online – a small screen, a keyboard, a sim-card reader, etc.
I buy some components on eBay, others on amazon, but also there are specialized online shops like https://www.waveshare.com that one can buy components.
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