Sick of Beige (SoB) board – RS232, 2-ch Relay and Prototyping board

February 25, 2017

Following on from last months post about my SoB DB9 breakout board I’ve design a few of more SoB breakout boards using the DP5050 footprint.

sb_relay2_small

The first is a 2-channel Relay Board. It has two relays with LED’s to indicate when they are active. Using it is pretty easy as it features the choice of screw terminals or pin headers to interface to it.

sb_rs232_small

The next is a universal RS232 breakout. I call it universal as all the pins (8 in total but not ground) from a 9-way RS232 DB9 are broken out onto pin headers. To connect up to these are the 4 signals (T1,T2,R1 and R2) from a MAX232 (or equivalent) RS232 chip. So you can swap around the transmit and receive and handshake signals as you like.

sb_protoboard_pcb_small

The next board is just a classic prototyping board. There’s not much too say about this board.

sb_sympsu_pcb_small

The last board is a symmetric power supply for rectify AC voltage into positive and negative DC supply rails. I’m hoping to use this for a audio project I’ve got in the works.

Dangerous Prototypes (DP) have a great page describing the various PCB sizes here:

http://dangerousprototypes.com/docs/Sick_of_Beige_standard_PCB_sizes_v1.0

As usual you can find them on my Tindie page here


Sick of Beige (SoB) board – DB9

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:

http://dangerousprototypes.com/docs/Sick_of_Beige_standard_PCB_sizes_v1.0

sb-db9_2_small
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.

Board Details:

– 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

Uses:
– Industrial Control
– Robotics
– Mechatronics

As usual you can find them on my Tindie page here


Raspberry PI – FieldBus CAN/RS485/RS232 add-on board

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.

rpi_piio_fieldbus1_small
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


WIP – new RPi Zero add-ons

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.


    Four new Raspberry Pi Zero add-on boards

    January 18, 2016

    Another bunch of new PCB’s. This time for the Raspberry Pi Zero.

    RPI_PCBs_201601_small

    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.


    New RPi MIDI board and a new MIDI Breakout board

    December 13, 2015

    RPi_PIIO_MIDI_PCB

    I should have called this post “yet-another RPi MIDI board” as it’s includes my third iteration of a MIDI interface for the Pi. But YARMB doesn’t actually trip off the tongue 🙂

    So here we have a new RPi MIDI board. Briefly its spec is:

    • MIDI IN via 5-W DIN Connector
    • MIDI OUT via 5-W DIN Connector
    • 3.3V Operation
    • HAT foot print (65 x 56mm).
    • Four fixing holes.
    • ID EEPROM (not fitted)

     

    In addition to the RPi MIDI, there’s also a MIDI break out board (BoB) board. It’s spec is:

    • MIDI IN via 5-W DIN Connector
    • MIDI OUT via 5-W DIN Connector
    • MIDI THRU via 5-W DIN Connector
    • On board 5V Voltage Regulator
    • Size 80 x 49mm.
    • Four fixing holes.

     


    Bumper box of new PCB’s

    July 30, 2015

    A bumper box of 10 new (yes 10 designs) PCB’s arrived this week.

    In it were 5 new (and updated) add-on boards for the Raspberry PC and 5 new boards for the Guitar Effect pedal designs I’ve been working on.

    Here’s a photo of the PCB’s.

    For the Raspberry Pi, we have a new revision for our popular PIIO ULNB803/GVS board which now features 2 stepper motor connectors for the popular 5v 28YBJ-48 stepper motor. A new revision for the PIAC with new screw terminals. A brand new Digi-IO which is a real world interfacing board with RS485, two relays and some level shifter for inputs. Another brand new PIIO design called “RasPellar” which is a IO co-processor board using the Parallax 32-bit 8-core Propeller CPU and a new HAT sized prototyping board that can be used by it’s self or with RasPeller.

    For the guitar effects we have two designs for a “modular electronic effects pedal” or MEEP to its friend. The MEEP board design gives you access to the audio In and Out jack sockets, 9V power and Vb (4.5V) as well as the foot switch and features a true bypass while the effects are added via a smaller daughter board. So if you get sick of using one guitar  effect you can simply swap it out with a new effects daughter board for a lot less than buying a new pedal. MEEP BB3 (base board – 3 pots) has three Potentiometers (pots) and MEEP BB4 (base board – 4 pots) has 4 pots. To go with the MEEP base boards there is a prototyping board, MEEP Screamer a clone of the awesome Ibanez Tube Screamer pedal and MEEP Fuzzy yet another clone of the just as awesome Arbiter Fuzz Face.