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Solar Power Devices
Blog Simple Solar BOT  ----Blog 2
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Engagement
  • Author Author: snidhi
  • Date Created: 8 Aug 2018 7:57 PM Date Created
  • Views 2844 views
  • Likes 12 likes
  • Comments 7 comments
  • solar_panel
  • solarbot
  • arduino_classic
  • solar_power
  • solarpwrdevicesch
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Simple Solar BOT  ----Blog 2

snidhi
snidhi
8 Aug 2018
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Solar Power Devices

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Project14 Home
Monthly Themes
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  • Testing the solar panels
  • Solar Panels Load Test
  • The Test Setup
  • The Voltage Measurements
  • The Solar Panel Current

Testing the solar panels

 

In this week I am testing the solar panels for their current delivery and voltage output under different solar and indoor conditions. This will determine how much load my solar panels can drive and how many devices I can hook up with its power on my solar BOT. And this will determine the selection of the motors to drive the BOT. And a choice between Arduino Nano or Arduino UNO controller should be done.

 

The power consumption of the Adruino Specifications

 

Parameters Arduino NanoArduino UNO
Voltage Output3.3V or 5V5V or 3.3V
DC Current per I/O Pin (datasheet)~40mA~ 40 mA
DC Current for 3.3V Pin (datasheet)--~50 mA
In sleep mode (datasheet)--~ 35 mA
Measured Current at no extra load (measured with 10milli-ohm shunt)130mA (powered by mini usb power)300mA (powered by USB A2.0B)
USB Overcurrent Protection (datasheet)-----500mA

 

The above tests show that Arduino Nano has less power consumption than UNO but is also limited in ports and functionality. But since solar panels are also not able to deliver much current a power hungry controller will not fit the needs of the Solar Bot. So I will carry on further with Arduino Nano.

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Fig: Testing Arduino Nano with 10 milli-ohm shunt measuring through 3.3V power pin

 

Solar Panels Load Test

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Fig: Test the current delivery of the Solar Panels

 

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Fig: As mentioned by the Solar Panel Supplier

The Test Setup

Fig: Solar Panel 1image

 

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Fig: Solar Panel 2 with Must have Ice-cream

 

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Fig: Both Solar Panels Connected in Series

 

The Voltage Measurements

 

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Fig: Voltage delivery of each Solar Panel

 

The Solar Panel Current

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Fig: Measurements in Strong Sunlight

 

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Fig: As the heat of the Sun starts to go down

 

 

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Fig: Solar Panel Measurement Indoor Light

 

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Fig: Solar Panel Series Current Measurement Outdoors

 

The solar panels are delivering good current output and it can be presumed that they will be able to drive decent amount of load.

 

Next Step will be to power up the sensors with Arduino Nano together with the motors and check the power delivery by the Solar Panels at full output load.

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Top Comments

  • jc2048
    jc2048 over 7 years ago +4
    The Uno and the Nano are both intended to be 5V boards. The 3v3 header pin is an output regulated down from the 5V. I think they intend it to be used to power circuitry on a shield board (have a look at…
  • snidhi
    snidhi over 7 years ago in reply to jc2048 +3
    I only measured the current directly in the 3V3 and 5V power lines after powering from USB. Cool thanks I will check the I/O lines.
  • snidhi
    snidhi over 7 years ago in reply to nirmal2000 +3
    Thanks
  • snidhi
    snidhi over 7 years ago in reply to jw0752

    Thanks John. image

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  • jw0752
    jw0752 over 7 years ago

    I am continuing to follow your interesting build.

    John

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  • snidhi
    snidhi over 7 years ago in reply to nirmal2000

    Thanks image 

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  • nirmal2000
    nirmal2000 over 7 years ago

    eagerly waiting for next vedioimage

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  • snidhi
    snidhi over 7 years ago in reply to jc2048

    I only measured the current directly in the 3V3 and 5V power lines after powering from USB.

     

    Cool thanks I will check the I/O lines.

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