DIY Linear Power Supply | Part-1

This DIY Linear Power Supply project is designed to provide a stable and reliable DC voltage output using simple and easily available components. It’s a great beginner-level project for anyone looking to better understand how traditional linear power supplies work and how to design one from scratch. In this series, we start by creating a clean and well-organized schematic in KiCad, covering everything from assigning footprints to tidying up the layout for clarity and professionalism. The final result will be a fully functional, custom-built power supply that you can use in your own electronics lab or personal projects.

🧾 Parts List
Voltage Regulators:
– 7805, 7812, 7905, 7912, LM317
Other Components:
– Heatsinks for regulators
– 1x 2x12V center-tapped transformer
– Bridge Rectifier: KBU610
– Capacitors:
 • 2x 2200µF 50V
 • 5x 100nF 63V
 • 5x 10µF 35V
– 10K potentiometer + knob
– 470Ω resistor
– 2x 4-pin 5.08mm screw terminal
– 1x 3-pin 5.08mm screw terminal
– 3x red female banana jack
– 3x black female banana jack
– 2x transparent black female banana jack
– 1x 5V cooling fan
– 1x 220V ON/OFF switch
– 1x fan ON/OFF switch
– 1x voltage and ammeter module
– 1x male and female input power connector
– 1x 220V 1A fuse
– 1x 220V power cord
– Some wires to connect terminals to banana jacks

🔌 Optional (for a cleaner build with connectors):
– 2-pin 2.50mm JST male and female connector (for potentiometer)
– 2-pin 2.50mm JST male connector (for fan)
– 2-pin 2.50mm JST male and female connector (for fan switch)
– 3-pin 2.50mm JST male connector (for voltage-ammeter)
– JST connector pins

⏱ Timestamps
0:00 - Intro
0:46 - Parts
4:00 - Schematic
8:25 - Footprints
9:22 - ERC & Tidy up the schematic
10:40 - Outro

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