March 28, 2017
It’s hard to believe but Maker Faire UK is almost upon us again.
It’s on this Saturday and Sunday 1st and 2nd April at the Centre for Life in Newcastle.
Full details are here:
I’m planning on taking my latest Raspberry Pi Synth along, something I’ve called unimaginatively PiZynth. As well as the pi synth I’ll have my Pi based R-Kade Mini.
So two full days of maker stuff to look ahead too. 🙂
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.
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.
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.
The next board is just a classic prototyping board. There’s not much too say about this board.
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:
As usual you can find them on my Tindie page here
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
December 26, 2016
A quick teaser for my next Raspberry Pi MIDI project:
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
October 12, 2016
Earlier in the month we participated in eDay5 at Gateshead Central Library. From the number at the end of eDay you can probably guess it was the 5th year we’ve been helping out at this great event.
For those who don’t know what eDay is, eDay is a local digital skills day where various digital technologies are demonstrated to an enquiring general public. A sort-of geeky show and tell where local groups and individuals meet at Gateshead Central Library and show off their projects or what interests them.
Maker Space has played a mayor role since it first started 5-years ago with demonstrations on 3D Printers, Arduino’s and Raspberry Pi. Other groups provided demonstrations of Oculus Rift, music, Ham Radio, DJing, retro computing and gaming and Lego Mindstorm.
There are some write ups of previous eDays here:
For myself, I took along my two Raspberry Pi based arcade machines: R-Kade and R-Kade Mini and in addition an early build of my latest project Pi project: a pretty large LED Display.
Check out Twitter for @gatesheadlibs and #eday5
September 29, 2016
Relay2 is my latest RPi Zero add-on board. It’s designed to control low voltage and small-ish current devices such as DC motors, servos etc.
Relay2 is a 2-ch Relay board with two Change-Over (CO) relays. Each relay is good for 30V AC/DC at 1A. The relays can handle a greater voltage than 30V but given the close proximity of the actually RPi Zero board I would not recommend going above 30V. The relays are easy to select via GPIO headers and they use 3-way Screw Terminals.
You’ll find them on our Tindie store real soon.