I’ve seen a couple of these projects online before on how to roll your own benchtop power supply. They usually involve eviscerating an existing PC power supply to wire in binding posts, fuses, switches, etc. These always look like the kinds of projects that make me want to reach for my wallet to buy one instead and use the free time to… oh, I don’t know, date girls or something. This simple one leaves the PC power supply intact and instead focuses on creating a benchtop interface that plugs into the supply, which is a lot easier. This way, you just plug the ATX motherboard connector (that you’ve either scavenged or bought) into the supply and you’re good to go. I love the way he’s spaced the banana jacks so you can use a standard two-prong banana plug to select ground and your desired voltage.