Linkit One Energy Harvesting

16551Published On Jun 26,2016 08:48 AMshare1

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By using energy harvesting technology I devised a method to power the Internet Of Things board: Mediatek Link it One. By creating a simple circuit using energy harvesting ICs such as the LTC3108 I was able to harvest enough energy from solar sources in low-light conditions to power the Link it One. This board can also be used to power Arduino boards and PICAXE micro-controllers.
In this instructable I shall explain how I did it.

Components:



• SSOP to DIP layout breakout board such as these, the side with 0.65mm spacing shall be used http://ebay.eu/1NLeJsQ 
• LTC3108 Energy harvesting IC from Linear electronics in the SSOP 16 Lead package (I got these as a free sample off the Linear electronics website but you can also buy them off ebay) 
• Coilcraft 1:100 transformer (I also got these as a free sample) 
• 330pF capacitor (0805 SMD or through-hole) 
• 1nF capacitor (0805 SMD or through-hole) 
• 1uF capacitor (0805 SMD or through-hole) 
• 220uF Capacitor (either SMD or through-hole) 
• 470uF capacitor (either SMD or through-hole) 
• Some headers 2.54mm spacing 
• A supercapacitor (e.g. 1F, 0.33F) 
A N-Channel MOSFET 
A 1M resistor
• A type of prototyping board e.g. veroboard 
• Some wire for connections on the prototyping board 
• A solar cell (should produce 0.55v in bright sunlight.


The LTC3108 coupled with the appropriate circuitry is able to step-up voltages as little as 20mv to 3.3v. I made the suggested circuit as shown on page 1 of the datasheet which I have included for your own convenience.





Step 1: Solder the LTC3108 to the break-out board

Step 2: Solder the transformer onto the proto-board

Step 3: Place on other components and linkwires

Step 4: Add the 1uF capacitor.

Step 5: Add the 220uF input capacitor

Step 6: Add in storage super capacitor

Step 7: Use PGood to trigger MOSFET

Step 8: Testing

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Berlina
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