DIY Infrared Motion Sensor System for Raspberry Pi

During the month of July 2015, I completed a high school internship at Colorado State University, and one of the projects that I worked on was that of a infrared proximity sensor for Raspberry Pi. This short range infrared sensor can be attributed to a variety of applications, including line-following robots and motion activated cameras. You will need: 1. Raspberry Pi (1) 2. Breadboard (1) 3. Perforated Pro ...

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Analog Sensors without Analog Inputs on the Raspberry Pi

The Raspberry Pi does not have any analog inputs, but that does not mean that you can't use some types of analog sensors. Using a couple of resistors and a capacitor, you can use a "step response" method to measure resistance. Which is just great if you are using a pot, photoresistor or thermistor. The Recipe that follows is taken from my new book "The Raspberry Pi Cookbook". This way of using sensors was i ...

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Raspberry Pi Photocell log and alert system

This is a simple instructable for making a RasPi-based photosensor-triggered alert and logging system which can easily be extended to show possible entries into a room like a closet or equipment locker that's usually dark, or to monitor light levels for any other reason. In this tutorial I use LEDs as the outputs, but they can really be anything. This tutorial pretty much only requires the Adafruit RPi Star ...

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Python and Raspberry Pi Temperature Sensor

It's been quite a long time, when I’d first posted this RPi sample. Time passed, I'd gathered some feedback form the community, took into account the comments, and this sample is ready to be published at Instructables for the public interested in microcontrollers and the Internet of Things. What does this example show? How easy, in just a few hours, you can build your first IoT fun project. Building a remot ...

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Raspberry Pi Universal Remote

In this tutorial I hope to convince you that this is the ultimate universal remote built using a raspberry pi. LIRC is the perfect for this job. It simplifies many of the more difficult tasks that we need to accomplish. Step 1: Parts 1 x Raspberry Pi (https://www.sparkfun.com/products/11546) 1 x IR Emmitter (http://www.amazon.com/gp/product/B005BJFDL6/ref=oh... 1 x Audio Breakout Board (https://www.sparkfun ...

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Interface to Wireless Driveway Sensor

I have a driveway that is over 300 feet long and it is nice to have some advance notice that someone is driving or walking in.  Previously, I have used a very expensive IR beam-break detector.  It gave a lot of false alarms and eventually failed due to a lightning strike.  It also required that I run a very long cable that could survive outdoors, which added more expense.  It’s time to switch to a wireless ...

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Interfacing DS18B20 Temperature sensor with Raspberry Pi

DS18B20 is a commonly used temperature temperature sensor providing 9 bit to 12 bit digital Celsius temperature measurements. The sensor communicates over one wire bus. Each sensor has a 64 bit serial code enabling multiple sensors to be connected to the same one wire bus. The Raspberry Pi has drivers for one wired devices to be connected to GPIO pin-4 by default. 1-wire is a device communication data bus s ...

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Building a Wireless Sensor Network in Your Home

This tutorial will teach you how to create a network of cost effective, wireless sensor modules.  Many of the ready-made wireless modules can be too expensive for use in multiple sensor units.  While Wi-Fi and Zigbee modules are popular and easy to use, their cost can make their use in an array of sensors impractical.  There are, however, low cost RF modules without all of the expensive features that will w ...

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Detecting Lightning with a Raspberry Pi

rious methods can be used to detect lightning. Commonly it involves sensing the electromagnetic radiation generated by a strike. Most people have probably heard this at some point as static, crackles, and popping sounds on an AM radio. Some detectors are capable of picking up the flashes of light produced within a cloud, even during the day when they usually can’t be seen by the human eye due to sunlight. O ...

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BMP180 I2C Digital Barometric Pressure Sensor

The BMP180 device is a digital barometric pressure sensor. This is available on a small module which provides access to the sensor via the I2C interface. This allows us to easily connect it to the Raspberry Pi with a minimum of wiring. My module is a small pcb measuring 15x13mm with a 5 pin header. The order of the pins may vary on other modules so keep an eye on the labels so you connect up the correct wir ...

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