Calibration

This example demonstrates one techinque for calibrating sensor input. The board takes sensor readings for five seconds during the startup, and tracks the highest and lowest values it gets. These sensor readings during the first five seconds of the sketch execution define the minimum and maximum of expected values for the readings taken during the loop. Circuit Analog sensor (e.g. potentiometer, light sensor ...

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High-temperature versions of MEC switches now for the price of standard versions.

Company MEC, Dutch producer of top-class push-button switches Multimec, Unimec and others comes with good news for developers and producers of electronics. Well-known reliable push-buttons were in majority of cases available in so called standard version (L6, -40...+115°C) and in a high-temperature version (H9, -40...+160°C). From now on, all types will be gradually available only in a „high temperature“ ve ...

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Arduino Resistance Data Logger

I was working on a project were I needed a cheap and efficient way to log the changing resistance of a sensor while simultaneously logging the temperature. This project is similar in many respects to the other data loggers on my site. Three prototypes have been built with the third one being a PCB. I have found this design to work extremely well for my needs.     The resistance measurement princip ...

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ESP8266 breadboard adapter and I’m on Tindie

The rise of the ESP8266 WiFi chip was almost overnight with Espressif’s open approach and pushing from Hackaday. While no ground-breaking product has yet emerged, the development on the chip are phenomenon. However due to an unknown reason the ESP8266 modules manufacture seems to prefer non-standard 2.0mm pitch connector, which gives a lot of headache to breadboarding lovers like me. This forced me to make ...

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DS1631 – Arduino Code and Temperature Validation

Basic information The DS1631 is a low cost, I2C interface digital thermometer popular in the maker community. Capable of providing 12-bit temperature readings over a -55°C to +125°C range. I have need for a digital thermometer in many of my projects and thought it would be nice to do a simple validation against a standard thermocouple. I have also provided an Arduino Script for use with the Arduinos IDE. Th ...

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Interfacing PIR sensor to 8051

PIR sensors are widely used in motion detecting devices. This article is about interfacing a PIR sensor to 8051 microcontroller. A practical intruder alarm system using PIR sensor and 8051 microcontroller is also included at the end of this article. Before going in to the core of the article, let’s have a look at the PIR sensor and its working. PIR sensor. PIR sensor is the abbreviation of Passive Infrared ...

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Live Action MATLAB – Arduino data logger.

Background I was in need of an affordable data logger for a project. I have access to MATLAB on all of my machines so it was an easy choice to build an Arduino based data logger that would easily interface with MATLAB R2014a. MATLAB is limited in both its sampling frequency (25 Hz) and its time lag (1 sec) but for my purposes these restraints where not a hindrance. In the fall of 2014 MATLAB updated their A ...

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Simple Infrared PWM on Arduino

We are often asked on discussion boards, about conflicts between IRremote or IRLib and other Arduino Libraries. In this post, we present a sketch for ‘Simple Infrared PWM on Arduino’. This is the first part in a 3 part series of posts. Part 1 shows how to generate the Simple Infrared PWM on Arduino (AKA carrier frequency), using any available IO pin and without conflicting with other libraries. Part 2 will ...

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Dented Joystick

Goals: The project goals are:            Adjustable number of detents Adjustable foce threshold Software controlled damping Implementation: A brief overview: The team's design utilizes several components: Arduino Leonardo Firgelli L16-50-35-12-P actuators (2x) FSRs (4x) TI L293D H bridge MSU Eagle custom PCB print     The Arduino microcontroller is the heart of the team's project. This microcontro ...

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See-through solar concentrator harvests energy from sunlight

A team of Michigan State University (MSU) researchers has created a transparent solar concentrator able to turn any window (or other sheet of glass, such as the screen for a smartphone) into a photovoltaic solar cell. What makes this development different? The panel is truly transparent. Earlier attempts at building transparent solar cells resulted in panels with tinted glass and/or compromised visibility. ...

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Staircase Meets Piano

In November 2014, we displayed our first completed project as a club, the Staircase Piano. The idea for the project was given to us by Professor Barry Brown before the club was even formed. Throughout the semester we worked towards putting the piano together for a final presentation before the end of the Fall 2014 semester. We started out the project only using an Arduino for both the sensor readout and the ...

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Marquardt 1841 – above standard classics

Classic push-button switches are favorite for many decades, maybe also because they´re well known already from the beginnings of electronics. Probably, a nostalgia is not the only reason making them popular, but mainly an easy control, when even an unacquainted person knows, that it´s something “what has to be pushed” to change a status of an electric device.   Exactly a term “to change a status” is importa ...

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