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🎯Goal
For a long time now, I wanted a lab power supply to power prototypes and help me repair electronics devices, but pre-builts I found were either too expensive for my usage or not portable. So my DIY power supply must meet personal requirements.
đź“‹Requirements:
- Being portable
- Being powered by the same cable as my soldering iron
- Have a current limiter
- Easy to use
- Cheap
🔍 Identify The Right Parts
To meet the need to be inexpensive, I mostly search on Aliexpress for the different parts of the power supply. For the main part of the power supply, I’ll use this SK35H 35W buck boost converter (10.34€). To power it, I’ll use this USB C to DC5525 (3.11€) that I already use to power my TS100 soldering iron. Since it uses the PowerDelivery protocol, it outputs a 12V 36W current which is perfect for the power supply. On the power supply side, I’ll use these DC5525 sockets (2.24€ for 10pcs). To connect standard 4mm banana cables, I bought this pack of 30 banana sockets on Amazon (11€)(it can be useful in the future). On Amazon, I also bought these regulation modules (13€ for 10pcs) to power a 5V fan (its dimensions are 30x30x10mm) from the 12V of the power input (I used one from an old Raspberry Pi, so I don’t have a link for it).
🛠️ Building a Case
Since I don’t want to move a bunch of wires, I’ve designed a case with Fusion 360.
The STL files if you want to print it yourself (Thingiverse):
🏆 Finished Product
