PLAY Embedded is a blog about embedded systems. We created this blog in the 2015 to share our discoveries with enthusiasts all around the world. This blog is largely focused on the usage of free and open source software.
All the content on this website is created in our spare time, and we have no interest in make any money from this. This blog is completely ads free and we love to get in touch with our small but passionate community: any feedback and suggestion is very welcome.
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The MAX7219 is a compact, serial input/parallel output common-cathode display driver. Included on-chip there are a BCD code-B decoder, the multiplex scan circuitry, segment and digit drivers, and an 8×8 static RAM that stores each digit. Only one external resistor is required to set the ...
We already talked about ChibiOS/HAL design and its multiple architectures support. This is very important for regular developers: imagine a scenario in which you design an application using a certain MCU and after a first stage you decide to upgrade your application. Imagine also that hardware ...
The nRF24L01 is one of the most popular RF transceiver as it is very cheap and it could be found already configured on small PCBs with needed passive components. This means that only a MCU is needed to design a radio system with the nRF24L01.
The nRF24L01 is a highly integrated, ultra low ...
Write reusable code is one of the most powerful and time-saving thing that an embedded programmer should learn. Compose well-arranged libraries makes things easiest, especially when we want to add old code in a new project. Citing one of the most talented programmers I have ever met, “Well done ...
The HD44780 is a controller for display developed by Hitachi commonly used to manage alphanumeric dot matrix LCD. This controller is a standard de-facto for this kind of display. It is often used in industrial test equipment, networking equipment, vending machine and in embedded ...
The DHT11 is a basic, low-cost digital temperature and humidity sensor. It uses a capacitive humidity sensor and a thermistor to measure the surrounding air, and spits out a digital signal on the data pin (no analog input pins needed).
The communication on data pin occurs according to a ...
When I started with embedded my knowledge about programming was (and probably still is) very elementary. I often used logical operator like logical NOT (!), logical OR (| |) and logical AND (&&) but was almost ignoring the bitwise operators.
Handling registers is actually so simple that at ...
By this article, we will show schematic of ChibiCube in order to understand how it works and hot it has been designed.
As mentioned in the previous article, ChibiCube addresses all its LEDs through the combination of anode and cathode signals. Each floor of the cube is configured as common ...
ChibiCube is a 3D LED matrix 8x8x8 composed by monochromatic LEDs individually addressable: that means not only every single LED could be in a ON or OFF state but everyone could be set at different light intensity.
In December 2012, students Ciro Domenico Pagano from University of Salerno, ...