John has been working to recover components from old power supplies and available trash electronics, in order to build controllers to power stepper motors and other mechanisms for the FabLab. Intro The Arduino microcontroller board is able to supply a current of 40mA from its output connections. These digital outputs are fixed at 5V “ON” […]
Controllers and Sensors using arduino Continue Reading
Overview In the first serial lab, you sent data from one sensor to a personal computer. In this lab, you’ll send data from multiple sensors to a program on a personal computer. You’ll use the data from the sensors to create a pointing-and-selecting device (i.e. a mouse). (:toc Table of Contents:) Connect the sensors Connect
Serial Duplex using an Arduino Continue Reading
About 2 years ago I picked up a ADJD-S371 color sensor from Sparkfun to work with my arduino. I spent a few days getting it to work, but finally got it going pretty well. I still get a few emails here and there asking for help with it. So I figured I would start bildr’s
Sensing color with the ADJD-S371 + Arduino Continue Reading
many cases switches are just switches. They directly control the flow of electricity to an appliance, flashlight or mains-voltage lamp. An example of this is the switch on the wall in your living room. In many cases nowadays however, switches are digital sensors, meaning that instead of directly controlling a high-powered device, they are controlling
Momentary Switch as Digital Sensor using arduino Continue Reading
Sometimes I just do not have time to connect to the internet and check current weather conditions. This is the reason why I made this indoor LCD weather display based on Atmega328 Arduino MCU. The circuit board consists of two LP2950 voltage regulators, MCU, four buttons, ENC28J60 Ethernet module and LCD12864 graphic display module. The
Arduino weather station part 2 using arduino Continue Reading
Well, looks like my sonar sensor (SRF05) is a just a tad inaccurate for precise measurement as I found from my radar screen I made (Arduino Radar Sscreen). So I’ve got hold of a Sharp GP2Y0A02 series infrared distance sensor. It’ll detect and measure anything within a 20-150cm range and it does this by triangulation
Arduino – Using a Sharp IR Sensor for Distance Calculation Continue Reading
Introduction Contents [hide] 1 Introduction 2 What You’ll Need to Know 3 Things You’ll Need 4 Connect the temperature sensor 5 How the Temperature Sensor Works 6 Install the External Libraries 7 Program the Microcontroller 8 Conclusion In this lab, you’ll see synchronous serial communication in action using the Inter-integrated Circuit (I2C) protocol. You’ll communicate with an
I2C Communication With An Infrared Temperature Sensor Continue Reading
Introduction Electrodes on the skin can be used to measure muscle (electromyography, EMG) brain (electroencephalography, EEG) and heart (electrocardiogram, ECG/EKG) activity. These electrophysiological measures are popular for clinical, research and hobbyist applications (such as brain computer interfaces). Most commercial systems are “medical grade” – these expensive systems offer high precision (16-24 bits), participant electrical isolation
Open source multi-channel EEG/ECG/EMG Continue Reading
