How to make earthquake alarm
Let’s test the D7S by Omron, the world’s smallest seismic transducer, and create a seismograph capable of a sensitivity and…
An Open Source Solid State Current measurement device
A solid-state amperometric sensor, capable of measuring up to 5 A providing a voltage that is directly proportional to the…
Presenting MQ sensors: low-cost gas and pollution detectors
Let’s discover a set of low-cost gas and pollution detectors that may be easily accessed from the Arduino World. Detecting…
Time of Flight technology: a Proximity laser sensor
Based on Time of Flight technology, the module provides information to a microcontroller regarding distance detected in front of its…
Very Useful Circuits…for Everyone!
With Very Useful Circuits, foundational concepts of electrical engineering are explored through progressive projects that illustrate the concepts in action.…
Microsoft’s Raspberry Pi Simulator: a Fully Open Source Prototyping Tool
Microsoft has released an early version of a free, open-source Raspberry Pi simulator that can be accessed right through a…
The 1sheeld Virtual People Counter
A virtual shield and a smartphone, with the addition of ultrasound sensors that allow us to detect passage and direction…
An Open Source Rain and Humidity sensor couple
It detects humidity through two sensors which are to be used alternatively to let us know when there is water…