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Full Graphic Smart Controller display for 3Drag 3Dprinter
Let’s substitute our 3D printer’s command panel with a dot-matrix that enables the display of graphics, function icons and animations. We would like to remind you that our 3Drag printer (that...
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Using LoRa shield in Packet Mode
In a previous post, you had the opportunity to discover a new Shield for Arduino, based on Semtech’s SX1278 chip that, in view of a very limited price, allows the implementation of a radio...
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Creating a Network of Nodes with LoRa Shield
In this last post of the LoRa series we will see how to use the board, so to create a network composed of addressable and safe nodes. Semtech’s SX1278 integrated circuit, on which this shield is...
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The ESP WiFi Shield: the best value for money and low energy consumption
It supplies Arduino with the WiFi connectivity and the external memory support on a SD-Card; it is based on a new module that is completely programmable, and offers the best value for money, with a...
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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...
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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...
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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...
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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...
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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...
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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...
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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. When...
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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...
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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 – on...
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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....
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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...
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An Open Source 4W Guitar Amplifier
Amazing board with volume and tone controls and a distortion fuzz integrated with activated/deactivated on demand; complete with a speaker and a power supply, it constitutes an essential tool for...
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An Open Source Filament Extruder for 3D Printer
Create filaments for FDM printing of your choice, by yourself, thanks to this self buildable machine that gives new life to PLA, ABS and PET leftovers. Even if their price decisively fell in the...
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Using a Telegram Bot and a Demo Board to experiment with home automation
Let’s discover the potential of the instant messaging app, Telegram, by creating a remote control, based on a smartphone and a WiFi powered demoboard. We may say that, when we have our smartphone in...
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A FPGA controlled RGB LED MATRIX for Incredible Effects – the Hardware
A dot matrix RGB LED graphic panel, managed by a FPGA-based controller board that may be separately used as a demoboard, so to evaluate the potential of the on-board Spartan 6. First installment. In...
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A FPGA controlled RGB LED MATRIX for Incredible Effects – the Software
A dot matrix RGB LED graphic panel, managed by an FPGA-based controller board presented in a previous post that may be separately used as a demoboard. Let’s see the software and how to use it in...
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