Get your first pcb board for Free:https://www.pcbway.com/
5$ for 10pcbs, 1-2 layers, build time 24h
30$ total for 1-20pcs for pcb assembly
Led voltmeter using just leds and resistors video:https://youtu.be/wAqIco9_Oaw
What Can You Make From PC Power Supply? - DIY Project ─ Hacktuber
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