The Raspberry Pi Pmod HAT Adapter from DesignSpark

by donpedro

Here at DesignSpark we are always keen to bring you exciting and relevant products, the latest offering from the DesignSpark Brand has been designed to expand your Raspberry Pi’s application portfolio even further. Anyone familiar with the world’s favourite computer will be aware of its potential as a development tool, becoming increasingly popular with developers and being used in multiple disciplines. With his fantastic Pmod HAT you can utilise any of the broad range of Pmods manufactured by Digilent ensuring your Raspberry Pi development projects gets as many advantages as possible from the get-go.

The DesignSpark Pmod HAT (144-8419) an be used with any of the following Raspberry Pi models:
Raspberry Pi Model A+ (833-2699)
Raspberry Pi Model B+ (811-1284)
Raspberry Pi 2 B (832-6274)
Raspberry Pi 3 B (896-8660)
Raspberry Pi Zero W
Raspberry Pi Zero

PmodAD1 (134-6443), which is a two channel 12-bit ADC module with a sampling rate of 1 million samples per second.

Time for a Raspberry Pi Pmod HAT Adaptor close up

PmodISNS20 (136-8069), which is a high accuracy Hall Effect current sensor.

5mm Follows Raspberry Pi HAT Specification
Provides access to full-line of Digilent Pmod Peripheral modules
Three Pmod ports: two SPI (JA/JB), one I2C (JB), one UART (JC), all three GPIO capable
SPU, UART, I2C, GPIO Connections are supported
5V barrel jack for external power
40-pin Raspberry Pi GPIO header
− Connector arranged as a 2×20-pin header, female, 0.1-inch pitch
− 26 GPIOs, 3.3V compatible inputs and outputs
− Two I2C ID EEPROM pins
− 8 GND pins
− Two 3.3V pins
− Two 5V pins
One power supply connector, or powered by the Pi via GPIO 5v pins
• 16mA current limit for all PMOD GPIOs

PmodOLEDrgb (134-6481), an organic RGB LED module with 96×64 pixel display. And 16-bit colour resolution.

Interfacing with Digilent
The DesignSpark Pmod HAT allows you to interface your Raspberry Pi with any one of the multitudes of diverse Digilent Pmods that are available from RS Components, such as:
When you combine your Raspberry Pi, the DesignSpark Pmod HAT Adapter and any one of the great Pmods manufactured by Digilent, you have a powerful and versatile prototyping platform with a wealth of hardware configurations at your fingertips.

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Nowadays, the demands on historically developed communication networks are getting more and more complex. Different networks with various data speed and data traffic are expected to communicate among each other. Where previously a classical fieldbus like CANopen, PROFIBUS or DeviceNet was the preferred network, Ethernet based protocols supplement or replace them today. A complete exchange of the communication modules is expensive and often not realizable. Therefore, the modular gateways from KUNBUS offer an excellent way to connect fast, easily and cost-efficiently different networks in compliance with the protection of investments.
Revolution Pi is an open, modular and inexpensive industrial PC based on the well-known Raspberry Pi. Housed in a slim DIN-rail housing, the three available base modules can be seamlessly expanded by a variety of suitable I/O modules and fieldbus gateways. The 24V powered modules are connected via an overhead connector in seconds and can be easily configured via a graphical configuration tool.

To achieve a real industrial suitability according to EN 61131-2 or IEC 61131-2, the rather unknown Raspberry Pi Compute Module was used as a basis. The module, which looks like a notebook RAM bar, is limited to the essentials and does not have any external interfaces. With the Raspberry Pi Compute Module the foundation has been laid for equipping the Raspberry Pi with a robust and industry-compatible periphery developed by us, which meets all important industrial standards. On the software side, the Revolution Pi has a specially adapted Raspbian operating system, which is equipped with a real-time patch. The use of Raspbian ensures that most of the applications developed for the Raspberry Pi can also be used on the Revolution Pi.

The KUNBUS-GW gateways consist of two modules each, which contain the respective protocol and are fitted with a common interface for the data exchange. Each module is integrated into the respective network as a Slave. The data is exchanged via a jumper that connects both modules.

The gateway converts all data that the target network can transfer. It omits nontransferable data and adds necessary data in the new network. Thus, the operators can transfer all necessary data from one closed network to another. This intelligent approach makes the KUNBUS-GW gateway highly flexible.

KUNBUS offers a protocol converter that can be attached to DIN rails and detached again easily by means of plug and play. The protocols themselves are located in compact modules, whose housings are just 22.5 × 101.4 × 115 in size. The modules are supplied with an operating voltage of 24 Volt whereby the power consumption is less than 3 Watt.

Whereas conventional gateways have to be replaced completely in the event of a technical malfunction, with KUNBUSGW gateways it is sufficient to replace the defective module only.

Apart from the resultant cost benefit from the module design, this approach offers another key benefit: The decision for or against a certain network only has to be made just before delivery. Consequently, it is possible to react better to any special and recent changes in requirements which have occurred.

Customized solutions are also possible. The gateways are equipped with an integrated web server; program parts are updated via FTP server. The gateway is matching with the most important protocols of industrial communication networks.

Auhtor: Bogdan Grămescu

COMPEC-lOGOAurocon Compec

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