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…
Home cinema becomes even more immersive thanks to Raspberry and addressable LEDs: let’s re-create the Ambilight TV effect on any other TV using Raspberry and Kodi. What’s better than watching a movie in front of your TV in the summer heat or …under a warm blanket in the winter? Once the perfect mood…
We are going to create a system managed by a smartphone for controlling home appliances and electric devices through Wi-Fi. Suppose you want to create a system for your home appliances and that you want to create it using a simple solution, a modular solution characterized by a wide array of customization…
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…
Some time ago we had introduced you to the Torpedo switching power supply, a particular kind of DC/DC power supply called SEPIC capable of supplying 5 V from several external supply sources, such as an external voltage between around 3.5 and 20 V, the 5 V coming from a USB connector or the 3…
Let’s build an interactive table equipped with a display and manual commands to create everything from videogames to animations for communication, teaching and entertainment. LED strips with serial control, and Neopixels in particular, allow us to create, when conveniently combined, many lighting effects and even matrix displays that can go up to remarkable dimensions;…
Let’s print the PCBs by means of our CNC machine, that this time has been fitted with a controller that connects to a PC via USB, that draws the control signals and that regenerates timed pulses, simulating the parallel port. In this post you had the chance to learn about and to evaluate…
RandA has been updated to be compatible with the 3rd version of Raspberry Pi: let’s going deep and explain all the new features. As you probably know, if you are familiar with the evolution of the raspberry board, in February of this year the 3rd new version of Raspberry Pi has been launched on…
Supplied with a robust chassis (made of plastics) and with three stepper motors, it is provided with a 9,000 RPM electro-spindle, to which it is possible to apply different kinds of milling parts, for the purpose of working wood, plastics, synthetic resins, and for carrying out small engravings on aluminum. It is not…
A Bluetooth enabled remote that will help you control one or more IR-controlled electric payloads. In this post, we are going to present a project for emulating an IR remote control composed of a RandA board (an Arduino that has connectors to interface with Raspberry Pi on one side and connectors for…
A 433,92 MHz Receiver that can be paired with a maximum of 10 Motorola TX each with relay outputs that can be set both in monostable or bistable mode. Although we have had high security encoding for several years, based for instance on rolling-codes, a lot of remote controls and especially those installed…
It can be controlled through logic levels to set the speed and the direction of the rotation of CC brushed motors and stepper motors; outputs have LEDs indicating the rotation direction. The circuit board we are presenting this time is based on the dual-bridge driver L298N, in a traditionally mounted version in a…
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