Hardware Pills Tutorials

Appunti sull’utilizzo di rele’ su PCB

Per gestire dei carichi tramite relè piazzato su un PCB occorre seguire degli accorgimenti sia per quanto riguarda la corrente che può attraversare le piste sia la tensione supportata dagli isolamenti e dai contatti (extratensione di apertura) sopratutto con carichi … Read More

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PWM pinout

Acqua A5 | Pin | Atmel name | Signal | |———-|————|——–| | J2.29 | PB0 | PWMH0 | | J2.31 | PB1 | PWML0 | | J2.23 | PB4 | PWMH1 | | J2.25 | PB5 | PWML1 | | … Read More

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How to design the USB circuitry

This article describes how to practically interface the UTMI peripheral of the Roadrunner MCU to an USB bus. Suggestions about circuit and PCB design in order to have a reliable and EMC compliant system in many different USB configurations. Introduction … Read More

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How to design the serial circuitry

The serial bus is one of the first communication systems in the computer era. Despite its venerable age, it’s still well alive and used for the great simplicity in both hardware and software management. Virtually all the microcontrollers have this … Read More

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How to design the microSD circuitry

HIQUEL_SnubberCalculator_AppNote_EN_0100 In a Linux embedded systems based on Roadrunner SOM, or similar, very often the OS starts from an SD card. The speed class of the SD card can, of course, improve the responsiveness of a system that often makes … Read More

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How to design the GPIO circuitry

This article describes how to practically interface the General Purpose Input Output lines of the Roadrunner to the external world with the hardware needed to protect the internal device by the possible ESD and EMI present in an industrial environment. … Read More

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How to design the Ethernet circuitry

This article depicts a set of rules of thumb on how to interface the MAC peripheral of the Roadrunner MCU to the LAN through UTP cable. Practical suggestions about circuit and PCB design in order to have a reliable 100Mbps … Read More

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How to design the LCD circuitry

The SAMA5D27 MCU installed on the Roadrunner SOM includes an LCD TFT controller capable of up to 1024×768 resolution, with four overlays, rotation, post-processing and alpha blending, with a 24-bit parallel RGB interface. This article describes its usage with schematics … Read More

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How to design the ADC circuitry

  This article describes some electrical characteristics of the ADC peripheral of the Roadrunner and how to condition the external analog signals to adapt them to the SAMA5D27 MCU electrical constraints. ##Introduction The ADC module of this MCU is based … Read More

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Long-lasting battery solution

This article illustrates a circuitry solution to build a power supply for very low power devices that need to be self powered for several years. This solution could be useful for remote sensors, IoT devices, beacons or similar, where the … Read More

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