Solar Piston Under Test

I have the latest Solar Piston design running in an arduino compatible circuit that also has a WiFi module (RN-171), temp sensor (TCN75A), and a light sensor (APDS-9301). The arduino sketch updates every 5 min (supposedly) to my pachube feed. Right now I’m sending temp and voltage. The light sensor is not hooked up yet. I’m deriving voltage by analogReading the band-gap reference. The battery im starting with is NiMH, because it might still hold charge if it accidentally drains low. Link to code and schematics coming!

Here’s some pics

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Graphs below show the last 24 hours. For different time scales, go here.

 

 

 

 

 

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