Joe Schmoe wrote: cptdodgerm wrote: rleyden wrote:
I've had good luck with the step down converter with an adjustable output voltage, http://www.ebay.com/itm/1-DC-DC-Buck-Co ... 2a3cdecf73
I set the output roughly to 5v then plug in the Pi fully loaded (camera, wifi, etc.) the adjust the voltage under load to 5.25 V. Where I previously had random issues running headless remote Pi, it is now rock solid. Previously, I had problems even using a re-purposed ATX PC power supply which put out a steady 5V at the source.
I totally agree on this. I cannot recommend these hard enough. They are perfect for ANY device that requires up to 30v at 3A. I use these on projects for my Pi, RC projects, camera's, mobile phone chargers, CCTV..plus much much more.
This looks very cool, but the page (at the link given above) is short on details.
Can you say more about how it works? What is the input?
Does it come with any sort of documentation?
For about $3 total (including shipping), I could just take a chance on it, but I've gotten some things this way with zero docu and have not been able to do anything with them.
This is a link to a UK seller of the same part http://www.ebay.co.uk/itm/5pcs-LM2596S- ... 20e0c81282
If you scroll down you will see if gives alot more detailed information. They do not come with an instructions because due to their simplicity, it is expected that the people who purchase them know what they are and how to use them.
It is quite simple really, you have voltage in and voltage out. On my units I use old laptop PSU's that had damaged connectors on them. I cut the end off and soldered the + and - to Vin + and Vin -, then whatever device I planned to use I would solder the devices's + to Vout + and the - to Vout - then with a multimeter on DC setting, you places the probes on the Vout solder joints and adjust the trimmer with a flat blade screwdriver until you see the output voltage on the multimeter adjust to your desired voltage.
There is a better version but just slightly bit more expensive http://www.ebay.co.uk/itm/LM2596-LED-Vo ... 2588ad27ba
This has the advantage of having LED's to show both input and output voltages which does away with the multimeter, a button that switches between input and output voltages and screw terminals to connect the wires to instead of having to solder them.
Due to both having a maximum output of 3A ( under heavy load and requiring a heatsink), they are perfect for your everyday small voltage needs.