• An open source Rain Sensor and controller

      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...

    • Posted 3 days ago
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  • An OTP (On Time Password) Lock

      Let’s create an electrically controlled lock that is opened by means of an always different code that is generated by our smartphone, on the basis of an algorithm that takes the time into account.   If...

    • Posted 2 weeks ago
    • 3
  • Print with Chocolate in two colours with 3Drag Choco Big Dual Extruder

      Let’s create a new evolution for our 3Drag printer, with a dual extruder for the printing of chocolate items of two types or colours. The 3Drag printer has been our answer to the growing need –...

    • Posted 3 weeks ago
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  • A Christmas Star with Neopixel LEDs

      A tech Christmas decoration, created by means of Neopixel LEDs and controlled via an Arduino Micro board, that takes up a minimal amount of space. With the Xmas holidays approaching, we always try to propose a...

    • Posted 1 month ago
    • 1
  • SmartPID: Smart Temperature and Process Controller

      Professionally engineered, SmartPID Controller, now on Indiegogo, is a high-tech product that facilitates temperature and process control: heating or cooling. Compared to a basic on/off thermostat, SmartPID is more an “open platform” that collects temperature from...

    • Posted 1 month ago
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  • An Electric Speed Control for DC motors

      It allows to change the revolutions per minute in any brushed motor that is powered by 12 to 35 Vcc, thanks to a handful of electric components and to the popular 555 timer. In different applications,...

    • Posted 2 months ago
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  • The BF 15+15W open source power amp

      A compact stereo amplifier that may be used at home as well as in the car, and also to substitute broken audio power amplifiers or to create bench power amps for the analysis of audio devices....

    • Posted 2 months ago
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  • The Strato Pi UPS board

      Makes Raspberry Pi suitable to be used in “professional” environments, sports a power source, an UPS, a RTC clock, a watchdog function, RS232 and RS485 converter and a buzzer. All in one.   In the previous...

    • Posted 2 months ago
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  • Analyzing Semiconductor with a set of simple tools

        A set of tools that – for an affordable price and without difficulties – is capable of identifying and verifying the features of BJTs, FETs, thyristors, diodes, etc.   Until a few years ago, it...

    • Posted 3 months ago
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  • A RTC SHIELD for Arduino and Raspberry Pi, second part

      Let’s see how to use this shield along with Raspberry Pi, by means of a dedicated library.   In the last installment we gave readers description of a new RTCC shield, based on the MCP79410 integrated...

    • Posted 3 months ago
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  • A RTC SHIELD for Arduino and Raspberry Pi

      Let’s use a new Real Time Clock by Microchip, by making it available on a shield for two prototyping boards. First Installment.   Many applications require an hourly information, that is locally obtained by means of...

    • Posted 3 months ago
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  • A Car Battery Level Indicator that plugs in your cigar lighter socket

      When inserted in the cigar lighter socket, it signals the electrical system’s voltage level by means of a bi-color LED.   Especially in the cold season, knowing the battery voltage, when the engine is off, allows...

    • Posted 4 months ago
    • 1
  • TORPEDO: an all-purpose switched-mode power supply

      Having explained the theory, let’s see in practice the project of the SEPIC power supply.   In this post we discussed – on a theoretical level (even if in a simplified way) – the SEPIC switching...

    • Posted 4 months ago
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  • The SEPIC switching converters

      The SEPIC configuration, a very useful one, is used in modern converters for mixed supply systems. Thanks to the availability of an always growing number of specialized integrated circuits that realize – with the help of...

    • Posted 4 months ago
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  • Discover and Design innovative applications in Wireless Power with Us

        The possibility to transfer electric power by means of electromagnetic waves was proved for the first time by Nikola Tesla, in 1890: he probably could not imagine how the discovery would have been appreciated nowadays....

    • Posted 5 months ago
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  • Octopus, a “tentacular” shield for Arduino and Fishino

      A shield that provides 16 digital or PWM I/O using a single Arduino/Fishino I²C bus. Ideal for managing multi-color LED or servo motors.   Arduino boards and compatible alternatives are really easy use and o powerful, capable...

    • Posted 5 months ago
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  • Keychainino: a programmable, playful Key Ring

        Based on Arduino, it performs electronic light games by piloting a LED matrix thanks to a special multiplexing mode.   In the “fast paced world” we live, moments when we can do whatever we want...

    • Posted 5 months ago
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  • Let’s Build an open source Quadcopter – Part2

      Let’s complete the construction of our aircraft and test it.   Now that you have physically created the quadcopter – according to the indications supplied in the first installment of this article (published here) – you...

    • Posted 5 months ago
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