Power Modules
Buck and boost converters, regulator modules, a breadboard power supply and an 18650 power bank board. Step a 12V or 24V supply down, lift a battery up, or feed a breadboard, with every module sold individually.
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Choosing a power module
Power modules convert one DC voltage into another. A buck (step-down) module lowers the voltage, a boost (step-up) module raises it, and a linear regulator lowers it simply but turns the difference into heat. For anything over a few hundred milliamps or a big voltage drop, a switching buck module runs far cooler.
| Module | Type | Output | Best for |
|---|---|---|---|
| Mini560 buck | Step-down, fixed | 3.3V, 5V, 9V or 12V, 5A | Set and forget rails from 12V |
| XL4005 buck | Step-down, adjustable | 0.8V to 30V, 5A | 24V printer supplies to 5V or 12V |
| 5V 1A buck module | Step-down, 7805 pinout | 5V, 1A | Replacing a hot 7805 |
| XL6009 boost | Step-up, adjustable | 5V to 35V | 12V gear from USB or a battery |
| AMS1117 module | Linear | 3.3V, 800mA | 3.3V modules from a 5V rail |
| MB102 breadboard supply | Linear, dual rail | 3.3V and 5V | Breadboard prototyping |
| 18650 power bank board | Charger and boost | 5V USB, 2.1A | Portable and battery projects |
Tips for getting it right
Leave headroom on the input
Buck modules need the input a couple of volts above the output. Check the maximum input too: the Mini560 tops out at 20V, so use the XL4005 on a 24V supply.
Set adjustable modules before connecting a load
Power the XL4005 or XL6009 with nothing connected, set the output with a multimeter, then wire in your device. A trimmer that has been bumped in transit can arrive at its maximum setting.
Derate for heat
Rated currents are peak figures. Plan on about two thirds of the rating for continuous use, and keep hot modules clear of PLA parts and enclosures without airflow.
Buying power modules from OzFDM
Every module is sold individually and ships from our Bibra Lake store in Perth. Orders over $299 ship free Australia-wide (excluding PO Boxes).
Power module FAQs
Can I run a Raspberry Pi or ESP32 from a 24V printer supply?
Yes. Use the XL4005 set to 5.1V, which handles the 24V input and the current a Raspberry Pi needs. For an ESP32 alone, the 5V 1A buck module is smaller and needs no adjustment.
What is the difference between a buck and a boost converter?
A buck converter steps voltage down, for example 12V to 5V. A boost converter steps it up, for example 5V to 12V. Both are switching converters, so they waste much less power as heat than a linear regulator.
Why is my boost module output lower than I set?
Boost converters draw more input current than they deliver at the output. If the supply or wiring cannot provide that current, the output sags. Use a stronger supply or thicker wire, and keep within about 15W on the XL6009.