New Pi add-on board – RPi Breadboard+ for sale

April 15th, 2015 No comments

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.

RPi_Breadboard+_small

RPi_Breadboard+_RPi_small

You can find them on Tindie here.

https://www.tindie.com/stores/DTronixs/

Categories: Raspberry Pi Tags:

Raspberry Pi ArcadeIO board

March 30th, 2015 No comments

Here’s the first build of the Raspberry Pi ArcadeIO board. It originally started as a requirement to upgrade our R-Kade Pi based mini cabinet.

 

RPi_ArcadeIO_small

You can find them on Tindie here.

https://www.tindie.com/stores/DTronixs/

Categories: Raspberry Pi Tags:

Raspberry Pi (Beeb) UserPort HAT

November 30th, 2014 No comments

Of the recent Pi boards we’ve made we think UserPort is probably our favourite. It’s a mimic of the BBC’s micros digital User Port and Analogue Port.

Back in the 80’s (gosh that sounds old) I built many electronic, robotic and other projects using the Beebs digital User Port and Analogue so reproducing their functionality for the Pi was a pleasure.

Digital I/O is provided by a I2C MCP23017 16-channel Port Expander

20W IDC Connector
1 3.3V
2 CB1
3 3.3V
4 CB2
5 GND
6 PB0
7 GND
8 PB1
9 GND
10 PB2
11 GND
12 PB3
13 GND
14 PB4
15 GND
16 PB5
17 GND
18 PB6
19 GND
20 PB7

Analogue Inputs by a 4-channel SPI MCP3004 10-bit ADC.

15W D Connector

Pin
1 3.3V
2 GND
3 GND
4 ADC CH3
5 GND
6 GND
7 ADC CH1
8 GND
9 N/C
10 I1
11 N/C
12 ADC CH2
13 I0
14 N/C
15 ADC CH0

Check our other stuff on Tindie

Categories: Raspberry Pi Tags:

New add-on Pi boards – RPi-X PIAC and RPiB+ Breakout+ for sale

October 31st, 2014 No comments

We’ve finally managed to find time to list two new boards on Tindie.

The first is RPi-X PIAC which is an experimenter add-on board for small industrial control projects. It feature 4x Relays (Change Over), 4x Opto-Isolated Inputs and 4x Analogue Inputs (0V to 10V). It also has a RS485 serial interface for communicating with industrial networks. You can find them here

RPi_PIAC_small

The second board is RPiB+ Breakout+ which is a breakout board for the Raspberry PI B+ I/O signals. It features 2x SPI headers, 2x I2C headers, 2x UART headers and 2x GPIO headers. It also has a prototyping area which is useful building your own circuits. It is compatible with the HAT board size and has a EEPROM (currently not fitted) for future HAT configuration. You can find them here

RPiB+_Breakout!_small

Categories: Raspberry Pi Tags:

HATS on for Raspberry Pi B+

August 14th, 2014 No comments

4 new PCB’s arrived in the post today. These are our first HAT’s (Hardware on Top) for the Raspberry Pi B+.

RPiB+_HATs_small

Top (L-R) – UserPort and Breadboard+, Bottom (L-R) – DIO32 and Breakout!+

All the boards adhere to the standard HAT size and include a ID EEPROM.

UserPort is probably our favourite. It’s a mimic of the BBC’s micros digital User Port and Analogue Port. Digital I/O is provided by a I2C MCP23017 16-channel Port Expander and Analogue Inputs by a 4-channel SPI MCP3004 10-bit ADC.

Breadboard!+ is a reworking of our earlier 170-pin Breadboard module but the extra size for a HAT PCB has allowed the inclusion of a two tactile push switches and three LED’s. As well as these, there’s also 4x Analogue Inputs using a 4-channel MCP3004 10-bit ADC.

DIO32 is a 32-channel Digital I/O board with two MCP23017 I2C Port Expanders.

Breakout!+ allows easy access to the I2C, SPI and UART interfaces and includes a small prototyping area for building circuits on.

Hope to have them on our Tindie store soon :-)

Categories: PCB, Prototype, Raspberry Pi Tags:

Raspberry Pi MiniPIIO MIDI board

June 26th, 2014 No comments

We designed our first Pi MIDI interface way back in 2012 while we were waiting for our first Pi board to arrive.

It’s went through several revisions since then and now looks like this:

RPi_MiniPiio_MIDI_small

RPi_MiniPiio_MIDI_Front_small

The circuit is now completely 5V as per the original MIDI specification but the MIDI IN is 3.3V compatible with the Pi via a voltage divider circuit.

OK that’s the hardware what about the software?

Getting a MIDI 31250 Baud Rate on a Pi is not easy as it should be as 31250 is not a standard Pi baud-rate. But you can trick your Pi into it if you overclock (or rather underclock) the UART clock.

Start a terminal session and type:

[sourcecode]
sudo nano /boot/config.txt
[/sourcecode]

Add these lines to the end of the file

[sourcecode]
# Change UART clock to 2441406 for MIDI 31250 baud rate

init_uart_clock=2441406
init_uart_baud=38400
[/sourcecode]

save and exit.

Once saved reboot your Pi.

Next we need to stop the serial UART being used by Raspbian for the shell console. Check my previous post “MiniPIiio RS232 set-up” on how to do this.

Finally we need to add the following to “cmdline.txt”

[sourcecode]
bcm2708.uart_clock=3000000
[/sourcecode]

After doing all of this we should be ready to connect a MIDI keyboard or synth to our Pi.

 

Check our store on Tindie:

https://www.tindie.com/stores/DTronixs/

Categories: MiniPiio, Raspberry Pi Tags:

Raspberry Pi Industrial Automotive Controller photos

June 24th, 2014 No comments

Here’s a photo of a finished RPi-X PIAC experimenter module:

RPi_PIAC_small
OK what does PIAC stand for?

PIAC = Pi Industrial Automotive Controller

It’s a Pi expansion shield that has 4x Change Over (CO) relays, 4x Opto Isolated Digital inputs and 4x 0V to 10V Analogue Inputs. There’s also a RS485 interface to communicate with industrial networks.

You can use it to learn about industrial control or perhaps even use it on your own small control projects.

Check our Tindie store:

https://www.tindie.com/stores/DTronixs/

Categories: Raspberry Pi Tags:

RPiB+ Breakout!+

May 18th, 2014 No comments

Here’s our first RPiB+ HAT compatible board Breakout!+.

RPiB+_Breakout!_and_RPiB_small

RPiB+_Breakout!_small

Check our Tindie store:

https://www.tindie.com/stores/DTronixs/

Categories: Raspberry Pi Tags:

Four new Raspberry Pi add-on boards

May 13th, 2014 No comments

Another box of new boards arrived today.

In the box where 4, yes 4 sets of PCB’s.

RPi_PIAC_and_others_small
In the photo, the big PCB at the back is RPi-X PIAC. On the photo front row, on the left is MiniPiio LED Breakout, in the centre is MiniPiio BOP4 and to the right is MiniPiio PWM16

RPi-X PIAC is our latest RPi-X experimenter board. The acronym IAC is commonly used to describe an industrial automation and control system and adding a P in this case makes it a Pi Industrial Automation and Control :-)

PIAC has 4x SPCO Relays rated at 2A, 4x opto-isolated digital inputs, 4x 0-10V Analogue inputs and finally a RS485 communications port. So with the RPi-X PIAC you can learn about industrial control or perhaps use it for your own small industrial project.

MiniPiio LED Breakout uses the popular MAX7219 8-digit (64x LED) LED display driver chip to breakout all 64 LED outputs to 8 rows of pin headers. From these pin headers you can plug in individual LED’s to make whatever LED display layout you want. It’s a shame its not Christmas as we think it would make a great blinky LED Christmas tree :-)

MiniPiio BOP4 or Board of Pots (or should that be “Bored of Pots”) has 4 potentiometers (3x rotary and 1x slider) and connects them to a 4-ch MAX3004 ADC. I think it will a great physical user interface. It’ll probably make a great companion to the LED/Switch MiniPiio SimpleIO we showed off a few months back. Of all the new boards I think this is my favourite :-)

The final new PCB, is MiniPiio PWM16. I think its name gives it away. It’s a hardware based 16-channel PWM add-on board using the popular PCA9685.

As always you’ll find them in our Tindie store in the next few days.

Two new Raspberry Pi add-on boards

April 29th, 2014 No comments

A new batch of PCB’s arrived today.

There were two new Raspberry Pi add-on boards in the box.

The first board is a 2-channel Type-K Thermocouple converter based on the MAX31855 chip.

The second board is RF Transceiver based of HopeRF popular RFM12B module.

I’ll plan to build them up in the next few days and if all goes well I’ll list them in our Tindie store.

RPi_MiniPiio_Thermocouple2_RFM12B_small