24V Power Supply

DIY Notes

While extremely useful, no single decent open source design exists for an Arduino-driven, switch mode, offline power supply converting to 12 or 24 volts. There is a number of examples of complicated switching in DC-DC, but nothing for 120AC to 24VDC supply such as for a 3D printer (250W) or a small welder (2kW) - which could both be very powerful, useful use cases.

Closest Examples

• None

SMPS Diagrams

• Simple low power - 12W - [1]

DIY BOM

• High frequency transformer - [2]
• $10 for a 500W transformer - [3]
• $6 for 100W - [4]

Regular

• 15A, $25 - [5]
• 17A, $20 - [6]
• 21A, $34 - [7]
• $32, 20A - [8]

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Mini

• Small dual 12/14 VDC 100W - [9]

• 24 V 4A - $11 -open [10]
• 5A closed black - $16- [11]
• 5A closed black - but need to splice in another cable - $14 - [12]
• 24V 3A $5 - [13]

With Terminals

• 24V 4.2A - $12 - L99xW82.5xH30mm - [14]
• 24V 5A - 120W - $15 - more bulky at 159 x 98 x 42 mm - [15]

Reviews

• 24V 4A review - 3week ship for $7 - [16]

• Same on Amazon - 6A $16 - [17]
• 6A $18 - [18]