Why this Blog?

The purpose of creation of this new blog was to add all my work that will solely related to my DIY Solar and wind electricity generation system. I will also add here the adventure of my DIY micro-hydro turbine (PAT) unit that has been planned to be implemented in the beautiful Kalam valley. In the recent past i unintentionally got attraction toward the green energy and studied a lot about.

My last visit to Karachi home was the turning point to divert all my intentions and resources toward getting into hybrid solar+wind electricity system. The 12 hours shedding at Karachi was really a mental shock to me. The 2Hours alternate load shedding scheme was so pathetic that for three nights i had only 6 hours of sleep in total. The Starting/Stopping the generator (located at the third floor) was a real muscular exercise especially the last part of the night.

The ready made solution requires a handsome amount of money. Here i will post my DIY approach to get the job done considering the advantage of being low cost, worth of experience and as per my requirement and quality. I intend to work on both Solar and wind turbine simultaneously so that to give the relief to my family.

Lets see will i have success in this endeavor?

Thursday, May 31, 2012

Now my Sensor has four eyes

Here is the 4-LDR version of the sun-tracking sensor with on-spot adjustment using four potentiometers. The four LDRs improves the field of view of sensor.  The micro-controller programming has been changed and tested under wide conditions of lighting and its working great.

So why i used the potentiometers? Because the all the 14 LDR's in my hand provided me different readings in dark and extreme light conditions. Only two LDR's matched together and for the rest i was getting the calculated resistors values 2.5K and 2.8K which are not standard values resistors. So i came up with potentiometers where i can adjust them to get the precise resistance. Now all the LDR's can be matched with these variable resistances and the sensor will give me perfect results. I will lock the pots once adjusted.

Now by change in microcontroller programming i shifted the timing interval control from the firmware to the hardware. Now the user can select the sense/react timing of the sensor with a single potentiometer and can change the movement of panels from real time up-to 15minuts delay. Real time means the panel sensor continuously track the sun and command the motor to move. I will set this for 10minutes for myself i.e. After each 10minutes the tracking sensor will start to move the panel toward the sun.

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