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Raspberry Pi & IoT – a perfect match!

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This article is about logging illumination levels to an IoT service using some inexpensive Light Dependent Resistors.

I tested three LDR’s with different pull down resistors at the same time to see which would give the best results with low and high lighting levels, and posted the Python code for logging to the ThingSpeak IoT service. Plenty of charts for you 🙂

Raspberry Pi IoT Experiment #1: LDR and ThingSpeak HowTo

Article Index

1. Introduction, ThingSpeak.com: Free IoT logging & visualization
2. LDR (Light Dependent Resistors) tracking illumination levels in my lab
3. LDR tracking sunset & more!

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In a surprise announcement, Eben Upton announced a price cut on the Raspberry Pi Model B+

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Apparently the Raspberry Pi Model B+ has continued to sell well despite the introduction of the quad core Raspberry Pi 2 Model B, and due to the production optimizations made for the Raspberry Pi 2, it was now feasible for the Raspberry Pi Foundation to drop the price of the Model B+.

The 40 pin GPIO Pi’s now sell for:

• $20 Raspberry Pi Model A+
• $25 Rasoberry Pi Model B+
• $35 Raspberry Pi 2 Model B

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Related Links:

• Raspberry Pi Model A+ Review
• Raspberry Pi Model B+ Review
• Raspberry Pi 2 Model B Review
• RoboPi Advanced Robot Controller for Raspberry Pi
• Pi RTC DIO I/O expander for Raspberry Pi
• Pi Jumper advanced breakout board for Rasoberry Pi
• EZasPi prototyping board for Raspberry Pi

I need some displays for my projects that don’t use GPIO’s or the SPI port, so I’ve been evaluating some LCD displays for my Pi projects – and I thought y’all might be interested in my findings!

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Article Index

• Introduction, Specifications, IPS TFT LCD Display
• HDMI Adapter Board, Raspberry Pi 2 Desktop
• More Screen Shots, Macro Shots
• Viewing Angles, Power Consumption, Conclusion

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Other recent LCD reviews:

• EastRising’s 480×272 TFT LCD module with an HDMI interface board with Raspberry Pi

I have been checking out IoT service providers to see which ones I might want to use for my Raspberry Pi based DAQ experiments.

Today I am taking a “Quick Look” at Temboo.com to see if it will fit my needs – and if it would fit makers needs.

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Article Link:

• A Quick Look at Temboo (IoT) Service

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Related Links

• Raspberry Pi Analog to Digital Conversion Experiements and HowTo
• A Quick Look at InitialState (IoT) visualization service
• Temboo

Unfortunately there is no LCD panel from the Raspberry Pi Foundation as yet, and I need some displays for my projects that don’t tie up the SPI port or the GPIO’s.

Today I look at EastRising’s 480×272 TFT LCD module with an HDMI interface board, and take it for a test drive…

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I tested the module at its native resolution, and experimented with three other scaled resolutions – there are 38 photos in my review.

Article Index

• Introduction, LCD Specifications, adapter
• 1080p Adventures
• Getting Native 480×272 display over HDMI from the Raspberry Pi
• EastRising 4.3″ TFT LCD Viewing Angles
• Trying a custom 960×544  HDMI mode with a 480×272 panel
• Trying a custom 480×544  HDMI mode with a 480×272 panel
• Conclusion

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