A solid-state amperometric sensor, capable of measuring up to 5 A providing a voltage that is directly proportional to the current. There are many practical situations where we need to know the current absorption of a circuit branch, a motor or in general, an electric utilizer. Sure, we could just use a multimeter set…
Let’s discover a set of low-cost gas and pollution detectors that may be easily accessed from the Arduino World. Detecting and measuring pollution and the main gases (the ones we may come across in our daily life) is always relevant; such operations are carried out by means of specific sensors, that are often very…
The Gumstix RoomSense is a USB dongle board that can detect room occupancy using passive infrared (PIR) technology and report on temperature, humidity, and barometric conditions. The board can be customized in the Gumstix Geppetto online development service, which was used to design it in the first place. Geppetto users can customize specifications online by…
Based on Time of Flight technology, the module provides information to a microcontroller regarding distance detected in front of its optical sensor based on time-of-flight of a light impulse. Contactless distance measurement, therefore employing electronics instruments, is a problem to which technology has been provided various solutions over the years; from a solution…
With Very Useful Circuits, foundational concepts of electrical engineering are explored through progressive projects that illustrate the concepts in action. Instead of abstract words and dry formulas, explore the function of transistors, capacitors and resistors by building with them into your own cool creations. Thansk to the new line of circuits, Lectrify allow you to:…
Microsoft has released an early version of a free, open-source Raspberry Pi simulator that can be accessed right through a web browser. Using Microsoft’s Azure cloud computing platform the simulator allows users to code an emulated Raspberry Pi using Javascript. The simulator has three areas: Assembly area, that displays the emulated project board. Coding area Integrated console…
A virtual shield and a smartphone, with the addition of ultrasound sensors that allow us to detect passage and direction of anyone crossing a passage. Most of Arduino’s success is also due to the fact that the base features of this board can be expanded by simply adding shields, which are boards containing hardware…
It detects humidity through two sensors which are to be used alternatively to let us know when there is water on the ground because it’s raining, or when the water level in a flowerpot is too low and it needs watering. How can we know the right value of the soil humidity in a…
It allows us to detect the presence and passage of an object thanks to the combination of a laser diode which emits a light ray and a phototransistor which detects reflected light. Robotics applications and industrial control systems normally make use of optical systems in order to detect proximity and passing of objects,…
Designed to be coupled to an irrigation controller, a weather station or motorized curtains and rolling shutters, it shuts down a relay when rain is detected. One major issue when dealing with sprinkler controllers is rain starting to pour during sequences execution, because in this case it is useless – if not damaging…
An open-source digital temperature and humidity sensor for Raspberry Pi that works using the serial port. The goal is to make an easy-to-use professional-grade alternative to the common DHT-22, which we see falls short on repeatability and userfriendliness. It also adds an ADC port to the RPi for an external signal. Board files and firmware will…
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