Raspberry Pi Sensors

In this article, by Rushi Gajjar, author of the book Raspberry Pi Sensors, you will see the basic requirements needed for building the RasPi projects. You can't spend even a day without electronics, can you? Electronics is everywhere, from your toothbrush to cars and in aircrafts and spaceships too. This article will help you understand the concepts of electronics that can be very useful while working with ...

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Voice– and SMS–Enabled Light Sensor Using Raspberry Pi and Twilio

Overview The Hacker School space for our batch had two restrooms: one attached to the main work area, and one downstairs. We thought it would nice to know if the bathroom is occupied before taking the time to walk down. Our project makes it possible to check the bathroom status by phone or text message. Bathroom occupancy status is determined using a light sensor attached to a Raspberry Pi. If the lights ar ...

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Raspberry Pi Sensor and Actuator Control

Typically as a programmer you will work with data on disk, and if you are lucky you will draw pictures on the screen. This is in contrast to physical computing which allows you as a programmer to work with data sensed in from the real world and to control devices that move in the real world. Goal Use a Raspberry Pi to read in accelerometer value and to control a servo motor. Definitions Raspberry Pi Small $ ...

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How to connect a Lego Mindstorms NXT Ultrasonic Sensor to the Raspberry Pi

Abstract Directly connect a Lego Mindstorms NXT Ultrasonic Sensor to a Raspberry Pi. A TCA9517 I2C bus buffer and an additional GPIO pin for SCL is necessary. A short C++ program to read the measured distance is provided. Introduction Raspberry Pi (Pi), despite some shortcomings, is definitely my favorite SBC. By far the biggest community and each and every detail is well documented. Lego Mindstorms, on the ...

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HC-SR04 Ultrasonic Range Sensor on the Raspberry Pi

In previous tutorials we've outlined temperature sensing, PIR motion controllers and buttons and switches, all of which can plug directly into the Raspberry Pi's GPIO ports. The HC-SR04 ultrasonic range finder is very simple to use, however the signal it outputs needs to be converted from 5V to 3.3V so as not to damage our Raspberry Pi! We'll introduce some Physics along with Electronics in this tutorial in ...

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Build Your First IOT with a Raspberry Pi, DHT11 sensor, and Thingspeak.

IOT or Internet of Things is a hot topic! According to the experts everything will be connected to the internet and all our devices and their data will soon be just an IP address away from us. So where do you start if you want to explore the world of IOT? How about a simple Temperature, Humidity, and Light sensor for your basement. Summer is here and being in the Northeast that means HUMIDITY with a capital ...

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Monitor your home temperature using your Raspberry Pi

At the end of the project you will have a WWW dashboard that looks similar to this: Multiple Sensors Display a temperature history graph per sensor What you need: Raspberry Pi Model A or B The following parts are available through the    PrivateEyePi Store: DS18B20 sensor(s) (TS01), one per temperature reading you want on the dashboard 4.7k resistor (one per sensor) (TS01) Jumper wire cables and breadboard ...

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Aeroponics with Raspberry Pi and humidity sensor

This instructable will teach you how to install an Aeroponics system that is controlled by Raspberry Pi. Aeroponics is plant-cultivation technique that has the roots hanging and is suspended in the air. Nutrient solution is sent to them in form of a fine mist. Aeroponics is compatible with any type of planting and can be used any time in the year. Using Aeroponics has its benefits by saving water and space ...

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Analog Sensors Reading with Raspberry Pi and Zabbix Supervisor

Analog Sensors Reading with Raspberry Pi as Interface The Raspberry Pi has no built in analogue inputs which means it is a bit of a pain to use many of the available sensors. We need a A/D interface easy to configure in the RPi and the MCP3008 is the answer. The MCP3008 is a 10bit 8-channel Analogue-to-digital converter (ADC). It is cheap, easy to connect and doesn’t require any additional components. It us ...

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Flood/Water Presence Sensor

How it works   This sensor has strips of metal plated probes that when in the presence of liquids change the resistance that will activate the internal switch. It can be mounted for example on a skirting board, with the the wireless sensor or Raspberry Pi some height above, via the attached wire. When the liquids drain away from the probe the resistance will drop and the switch contacts will open again. Liq ...

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