This month, we present our feature-rich hobby power supply, complete with backlit LCD to show the voltage and current, current limiting functionality, and thermally controlled fan to cool the power supply only when it needs it to avoid excessive noise. By limiting the current, there is less chance for components or PCB tracks to overheat and burn out. Also important for prototyping, is current limiting, which can avoid damaging the circuit if you accidentally build or wire it incorrectly. BUILD TIME: 5 HoursĪ reliable power supply is a must for any electronics enthusiast’s workbench, and ideally, it should provide common voltage outputs with an adequate current to suit most prototyping needs. Build a 3.3V to 12V hobby power supply with current limiting and voltage display.
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