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The concurrency.cc Board omerk

Parallel blinkenlights!

http://concurrency.cc/hardware/ccc

Recent activity:

  • psd bom received5 years ago
  • psd pushed to5 years ago
  • psd bom received5 years ago
  • psd pushed to5 years ago
  • 9600 updated5 years ago
  • omerk updated5 years ago

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Description

We are a group of educators and researchers exploring the development of tools that make parallel programming more accessible to people. Our hope is that concurrency.cc will serve the community of developers surrounding parallel and concurrent languages on the Arduino and other low-cost embedded platforms. We have a book and a software package that is aimed at people interested in exploring concurrency on the Arduino using a natively parallel programming language: occam-pi. More information can be found on our website at http://concurrency.cc

The concurrency.cc Board was developed to support our explorations of concurrent and parallel programming on small devices. It is based on the original Arduino (Duemilanove) design but it differs from it in a few ways:

  • 1206 and generally large components: As we are planning on using this board as part of classes and workshops, we thought it would be cool if people soldered up their own boards, hence the decision to pick fairly large surface mount devices. (Contrary to popular belief, surface mount soldering is really not that hard and does not require surgical-precision hands and ridiculously expensive tools!)

  • Boost Converter for single AA cell operation and a JST/Li-Po input: Arduino boards are quite often battery powered, and the idea of powering the entire Arduino board from a single AA cell definitely sounded like a cool idea, so we included the clever little device NCP1400A to our design. As this is an extra feature we have added a solder jumper to simply bypass this and use the standard LDO configuration instead.

  • Extra set of LEDs: The c.cc board supports up to four LEDs, allowing us to easily demonstrate parallel programming in educational contexts without any additional circuitry. All the LEDs, including the standard LED that is connected to Pin 13, have solder jumpers so they can be disconnected from the microcontroller pins if necessary.

  • An extra set of 100mil spaced pin headers: The original Arduino footprint has oddly spaced headers between the top digital pins and for shield compatibility we are keeping those, but to make it easier to plug vero-boards in we have added another set of connectors with a standard 100 mil spacing.

  • FTDI cable/breakout footprint: If you have spent some time in the Arduino and general embedded systems domain, the chances are - you already have an 'FTDI' cable or a breakout lying around somewhere. This extra programming header gives us the option of skipping the USB bits on board so it is both a cost cutting and time saving exercise.

Please get in touch if you have any comments/questions.

Schematic

Board

Bill of Materials

Designator Value Description
CON1 UX60-MB-5ST Hirose Mini-USB Connector
CON2, CON3, CON6, CON7 S4108-ND 8 Pos. Female Header
CON5, CON8 S7039-ND 6 Pos. Female Header
CON4 WM26806-ND 6 (2x3) Pos. ISP Header
CON10 PRT-09015 6 Pos. Male Header (FTDI)
CON9 455-1749-1-ND JST Battery Connector
C1, C2, C3, C4, C5, C6, C10, C11, C12 399-1249-1-ND .1uF (100nF) Capacitor
C7, C8, C9 293D476X9016C2TE3 47uF Tantalum Capacitor
D3, D4 MBRA140T3G Schottky Diode
F1 MF-USMF050-2 PTC Fuse(Ih=.5A, It=1A)
L1 VLCF5020T-220MR75-1 22uH Power Inductor
Q1 NDT2955 P-Channel Mosfet
R1, R2, R4, R5, R6, R7, R8, R9, R10 RHM1.00KFCT-ND 1K Resistor
R3, R11, R12 RHM10.0KFCT-ND 10K Resistor
SW1 B3FS-1012 SPNO Push Button
SW2 JS202011SCQN DPDT Slide Switch
U2 ATMEGA328P-PU AVR Microcontroller
U2/Socket 4828-3004-CP IC Socket (28 DIP)
U3 NCP1400ASN50T1G Step-Up Converter
U4 LD1117S50TR LDO Regulator
U5 LM358D Op-Amp
Y1 X9080ND 16 MHz Resonator
D1, D2, D5, D6, D7, D8, D9 475-1407-1-ND Green, Red, Blue or White LEDs
J1, J2, J3, J4, J5, J6 Jumper Solder Jumper

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This project is © The concurrency.cc Team, and is published under the terms of the Creative Commons Attribution-ShareAlike 2.5 Generic licence.