This neat little power supply board is super useful for your gadgets drawer.
What makes them so handy is that they are a SEPIC, otherwise known as a Buck-Boost, or Step-Up Step-Down DC-DC converter.
That means that once you set the output voltage, your input voltage can be lower, or higher than the output, and the output stays the same.
Input: 3 to 35v
Output: 1.25 to 30v
Maximum output power: 12w without heatsink, 20w if you slap a nice heatsink on the bottom of the board (not included)
Maximum current (either end): 2 Amp but remember the power limit above.
Especially useful for little power harvesting and alternative energy projects like solar where your panel will produce wildly different voltages depending on the available sunlight, hook one of these babies up to stabilise that voltage.
Based on the LM2577, usage is simple, connect your input voltage on one end, and take your output from the other, the trimpot adjusts the output. So just use your multimeter to set it as required.
They are pretty high efficiency - varies by the input/output ratio up to around 92% in the best conditions but you are more likely to see around 80 to 84%, still vastly better than a linear regulator!
If you are making a small adjustable PSU out of these, you might need some of my other listings too!
Fuses and a Fuse Holder: 283.mytrademe.info
Some binding posts: 283.mytrademe.info
A DC input jack: 283.mytrademe.info
