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


Zero MIDI

December 26, 2016

A quick teaser for my next Raspberry Pi MIDI project:

 


Relay2 – new Raspberry Pi Zero add-on board

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.

rpi0_piio_relay2_small

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.


Two new Raspberry Pi Zero add-on boards

August 30, 2016

I’m very pleased to show off our latest Raspberry Pi Zero add-on boards.

RPio_PIIO_ADC16_UserP0rt_small

The board in the top of the picture is PIOO UserP0rt which features a 16-ch port expander and 8-ch ADC using the MCP23S17 and MCP3008 ic’s.

While the board in the bottom of the picture is PIIO ADC16 which is a 16-ch ADC board and features 2x MCP3008 ADC’s (each 8-ch, 10-bit).

You’ll find them on our Tindie store real soon.


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.


DIY micro USB Hub for Raspberry Pi Zero

December 4, 2015

After ordering the new Raspberry Pi Zero I suddenly realised I didn’t have a suitable micro USB cable adapter to connect either a keyboard or mouse to it. Now common sense would have been to go back on-line and order either suitable cables or a suitable micro USB hub but as the maker saying goes “necessity being the mother of invention” so I decide to make my own. In this case a non-powered micro USB hub.USB_Bits

Getting the base components was easy. A quick call into a “pound” (or the equivalent dollar, euro etc.) shop got me a micro USB data/charging cable and a USB hub as shown for the princely sum of £2.

Tools

The basic tools are:

Cutter
Screwdriver (flat and/or Philips)
Wire Strippers
Scalpel/Small knife
Soldering Iron
Solder

 

Open USB Hub case

USBHub OpenUSBHub_PCB

Depending on the screws used in the USB Hub case you may need a Philips screwdriver to open the plastic USB Hub enclosure. In my case, the Hub’s plastic enclosure was clipped together and a bit of squeezing and gentle persuading with a flat bladed screw driver saw it come apart.

 

De-solder USB Cable

USBHub_Desolder_Wires

Once the USB hub is apart you should see a small PCB with a number of USB connectors and a cable. Make a note of the wire colour and positions. De-solder the existing USB wires from the PCB. Carefully apply heat from the soldering iron to the soldered wire and when the solder melts, gently lift the wire away from the PCB pad.

 

Prepare micro USB cable

MicroUSB_Cable

MicroUSB_Cut_Cable

MicroUSB_Strip_Wires

With the wire cutters, cut the USB A connector (the bigger of the two USB connectors) off the cable. With the wire cutters or a small knife/scalpel cut back and remove about 2cm of the external cable insulation. Using the wire strippers, strip about 5mm of insulation from each of the individual wires. Finally, for each wire twist the copper strands and using the soldering iron, “tin” them and repeat for all wires.

 

Soldering the new cable

USBHub_Solder_WiresUSBHub_Wires

Remembering to use the info from the note you made earlier ;-), match the wire colour’s to the PCB pad and solder the first of the new wires from the micro USB cable back on to the USB Hub PCB. Repeat this for each of the wires in the micro USB cable. Once finished, check your work for any solder bridges and/or dry joins.

 

Putting it back together

Once you’re soldered all the wires back on the USB Hub PCB, reassemble it back into its plastic enclosure. You may want to add a tye-wrap to act as a strain relief for the micro USB cable.

MicroUSB_ReAssembleUSBHub_Finished

FIN