January 9, 2017
Whilst looking to build some breakout boards I remembered the Sick of Beige (SoB) “standard” of PCB footprints designed by Dangerous Prototypes. DP have made a really cool set of PCB footprints in various sizes with the added bonus of being designed to be case friendly.
Dangerous Prototypes have a great page describing the various PCB sizes here:
My first Sick of Beige (SoB) board is SoB DB9, using the DP5050 footprint. This is a handy little breakout board for those wanting to build their own 9-way D-Type interfaces be it for RS232, RS485, CAN bus or any other project.
A standard 9-way D-Type (Male) connector provides the interface with 3.5mm Screw Terminals connections provided for easy interfacing. In addition a Male Pin Header connections is also provided. Two small circuit prototyping areas are also provided.
– 9-Pin D-Type connector (Male)
– Easy to Connect Headers
– 3.5mm Screw Terminals
– 2.54mm Pin Header
– small circuit prototyping area x2
– Compatible with Sick of Beigh DP5050 footprint
– Board Dimensions: 50 x 50 mm
– 3.2mm Mounting Holes x4
– Industrial Control
As usual you can find them on my Tindie page here
November 22, 2016
Despite USB being everywhere, I still use a lot of industrial and embedded interfaces, such as RS232 and RS485 interfaces, in my projects. Legacy equipment especially and even new industrial equipment still use RS232 for programming and monitoring. While RS485 interfaces can still be found a lot in industrial communications such as factory automation.
So with this in mind I felt I needed an Raspberry Pi add-on board to simplify a lot of these connections. So here is the Raspberry PIIO FieldBus add-on board. It is a multi-communications board RS232 or RS485 and CAN Bus interfaces.
The board uses 3.3V components and is completely voltage compatible with the Raspberry Pi.
The board connects directly to the Raspberry Pi’s SPI to provide CAN Bus communications and also to the UART Rx and Tx to provide RS232 or RS485 communications.
CAN Bus interface uses MCP2515 CAN controller and MCP2551 CAN transceiver IC provides CAN Bus v2.0 A/B at 1 Mb/s. It is connected the Pi’s SPI Interface. Connection is provided via a 3-Way screw terminals.
RS232 interface uses a 3.3V MAX3232 (or Equivalent IC) chip and CTS (GPIO16) & RTS (GPIO17) signals are provided. Connection is provided via an industry standard 9-Way D Connector (Male).
RS485 interface uses 3.3V MAX3485 (or Equivalent IC) chip with DE (GPIO27) & !RE (GPIO22) used to control the RS485 transceiver control signals. Connection is provided via a 3-Way screw terminals to the outside world.
The Raspberry Pi expansion port has only on UART interface available for serial communications. So where both circuits are fitted, only one RS232 or one RS485 interface may be connected to the UART, therefore only one interface can be used at any time.
You can find them on our Tindie store
June 29, 2016
This last month I’ve been working on some new add-on boards for the Raspberry Pi Zero.
In no particular order:
ADC16 – 16-ch ADC board (2x MCP3008 8-ch, 10-bit)
UserP0rt – 16-ch port expander and 8-ch ADC (MCP23S17 and MCP3008)
Relay2 – 2-ch Relay board (2x Relays 30V, 1A)
I’ve just sent these off to be manufactured, so I’ll post an update when I’ve got them back.
January 18, 2016
Another bunch of new PCB’s. This time for the Raspberry Pi Zero.
In no particular order, there’s a serial RS232 board, a GVS I/O board with ULN2803 for servo’s etc., a Breakout board (I2C, SPI, UART and GPIO) and another MIDI interface ;-).
More details/info shortly.
As usually you’ll find them on our Tindie store.
April 15, 2015
RPi Breadboard+ is a solderless prototyping breadboard add-on for the Raspberry Pi. Using the breadboard and female to female wires you can quickly prototype and test your electronic design.
A large portion of the add-on is taken up by a 140-pin breadboard and surrounding the breadboard on all four sides are a number female headers.
All of the Raspberry Pi GPIO signals are brought out to two 16-pin female headers located near the top and bottom of the breadboard. 3.3V (5-pin), 5V (5-pin) and 0V/Ground (12-pin) power supplies are also brought out to female headers located to the sides of the breadboard.
The add-on features 3x LED’s (red, yellow and green) and 2x push-button tactile switches each having a 2-pin female header for easy use with the rest of the board.
Size wise it conforms to a standard HAT board size (65 x 56mm) and mounting holes. So its compatible with the Raspberry Pi A+, B+ and Pi2.
There is an EEPROM PCB footprint for future HAT configuration compatibly but its not fitted on this version.
You can find them on Tindie here.
February 27, 2015
The wiring in my Raspberry Pi mini arcade cabinet is getting a much needed upgrade.
I originally build R-Kade for Maker Faire 2013 and its been at various other Faire’s around the country and at eDay for the last two years. It was quickly build out of a bookshelves, old VGA monitor, WII arcade controller and a raspberry pi. The control board was removed from the WII arcade controller and the joystick and buttons wired directly to a prototyping board on the Pi. Unfortunately, it’s this wiring which is becoming a problem and needs redoing.
Rather than just strip out the wires and rewire new, I decided to make myself a better solution and have designed a Pi ArcadeIO board. The ArcadeIO board has screw terminals for connecting the wires to the Pi’s GPIO signals. In addition the GPIO signals have in-line resistors to limited the effects of any short circuits. There are addition screw terminal positions for connecting common grounds for the arcade switches and joystick.