Raspberry Pi IoT Experiment #1: LDR & ThingSpeak

May 17th, 2015

Raspberry Pi & IoT – a perfect match!

Raspberry Pi IoT Experiment #1 http://Mikronauts.com

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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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Raspberry Pi Model B+ price reduced to $25USD

May 14th, 2015

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

Raspberry Pi B+ @Mikronauts http://Mikronauts.com

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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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HannStar 10.1″ TFT LCD & HDMI Adapter Review with Raspberry Pi 2

May 10th, 2015

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!

RPi2 + 10.1" TFT Review @ http://Mikronauts.com

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Other recent LCD reviews:


A Quick Look at Temboo (IoT) Service

April 28th, 2015

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.

Temboo Quick Look @ http://Mikronauts.com

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EastRising 4.3″ TFT LCD HDMI module Review and Experiments with Raspberry Pi

April 26th, 2015

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…

EastRising 4.3" TFT LCD with Raspberry Pi Review @ http://Mikronauts.com

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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