Presented at Scratch Day Seoul, 16th May. Making process of sensor board works with scratch in Korea was reviewed and how we can sustain open source hardware project was discussed.

1. Sustainable
Open Source Hardware
Project
hhjjj.com, 16th May 2009

2. Localizing & Updating
Parts LED indicator
Strap hole
RS232->USB
polySwitch
phototransistor -> photore
sistor
audio plug -> terminal blcok

3. B.O.M. Bill of Material
Ma
Name in nuf Supplier # per
Part value schematic Manufacturer act Supplier Part # Package board
PIC PIC16F676- 14 pin
Microcontroller U1 Microchip 16 Digi-Key I/SL-ND soic 1
Texas LM 296-1014-
lm358 op amp U5 Instruments 35 Digi-Key 1-ND 8 pin soic 1
TE
Phototransistor U7 Vishay MT Newark SMT 1
423-1023- through
microphone U4 Digi-Key ND hole 1
MJ- CP-
25 2523MJCT-
Audio Jacks A,B,C,D CUI 23- Digi-Key ND SMT 4
57 1206
RS232 jack J1 Tyco 47 Digi-Key A32115-ND SMT 1
311-
2.2KERCT- 1206
resistors 2.2k R11 Digi-Key ND SMT 1
R1,R2,R3, 311-
R4,R5,R6, 10KERCT- 1206
resistors 10k R9,R10 Digi-Key ND SMT 8
311-
100KERCT- 1206
resistors 100k R7,R8,R12 Digi-Key ND SMT 3
capacitor 10uF C1 *n 0
T3 399-3652- through
capacitors 47uF C8 Kemet 56 Digi-Key ND hole 1
C2,C3,C5, C1 399-1249- 1206
capacitors 0.1uF C6,C7 Kemet 20 Digi-Key 1-ND SMT 5
CC 311-1180- 1206
capacitors 0.33uF C4 Yageo 12 Digi-Key 1-ND SMT 1
SM SMAZ5V1-
zener diode 5.1V D1 Diodes Inc. AZ Digi-Key FDICT-ND SMT 1
DL DL4448TPM 1206
signal diode D2 MCC 44 Digi-Key SCT-ND SMT 1
through
button U8 Digi-Key SW414-ND hole 1
button cap Digi-Key SW257-ND 1
EW PP1045SB- through
slider 10k U3 Panasonic A- Digi-Key ND hole 1
3.5quot; x 2.5quot;
PCB Multifor 1
SJ- SJ5312-7-
rubber feet 3M 53 Digi-Key ND 4
Audio Cables
w/ alligator you
clips assemble 4
any cable
USB-serial or serial
cable port 1

4. kind B.O.M. Bill of Material
Part Value Device Package Eagle Library Price Q Manuf. Purchase note
C1~C5 0.1uF C-EUC3216 C3216 rcl 10 5 any
CDS 5-Pi A1050_11 T0-46 photo-elements 300 1 any TEMT6000
D1 1N4148 DIODE-SOD80C SOD80C diode 50 1 any DL4448
F1 RXEF050 PTCPTH PTC SparkFun 150 1 Tyco
IC1 PIC16F676SL PIC16F676SL SO-14 microchip 860 1 microchip
IC2 LM358D LM358D SO08 linear 400 1 fairchild
IC3 FT232RL FT232RL SSOP28 ftdichip 5500 1 FTDI
JP1 M05PTH 1X05 SparkFun 20 1 any
LED1 LED1206 LED-1206 SparkFun 50 1 any
LED2 LED1206 LED-1206 SparkFun 50 1 any
R1, R3, R4 1k R-US-M3216 M32316 rcl 10 3 any
R5~R11 10k R-US-M3216 M32316 rcl 10 7 any
R12 2.2k R-US-M3216 M32316 rcl 10 7 any
R13, R14 100k R-US-M3216 M32316 rcl 10 7 any
R15 4.7k R-US-M3216 M32316 rcl 10 7 any
S1 40-XX B3F-40XX switch-omron 200 1 Alps FM
U1 SLIDEPOT45 SLIDEPOT45 SLIDEPOT45 fetm 1200 1 Alps OEM FM
U2 MIC MIC MIC9.7MM fetm 800 1 BSE Co.
X1~X4 AKZ350-5-2 AKZ350-5-2 AKZ350-5-2 hhjjj-con 200 4 Pheonix
X5 USBMD USBMD USB-MINIB SparkFun 300 1 any

5. Schematic
Resettable Fuse
Built-in USB-to-Serial
Adaptor

6. Gerber file
Terminal Block
for
audio plug
alternatives

7. kind CAD
Web-based
Sharing
Exporting

8. License - Documentation
Scratch Sensor Board Design License
Copyright (c) 2007 Massachusetts Institute of Technology
All Rights Reserved.
Scratch and the Scratch Sensor Board were developed by Lifelong Kindergarten group at the
MIT Media Lab. See scratch.mit.edu.
Permission is hereby granted, free of charge, to any person obtaining a copy of the Scratch
Sensor Board design, including the schematic diagram, printed circuit board design files,
firmware source code, and accompanying documentation (the quot;Designquot;), to use, copy, modify,
merge, publish, produce, or distribute hardware based on the Design or designs derived from
GPL / LGPL
BSD
it (quot;Derivative Worksquot;), and to permit persons to whom the Design is furnished to do so,
subject to the following conditions:
1. The above copyright notice and this permission notice shall be included in all copies of
MIT
the Design and Derivative Works. When distributing hardware based on the Design or
Derivative Works, it is sufficient to include a URL to a public website with this information.
2. The phrase quot;Scratch Sensor Boardquot; shall not be used to refer to Derivative Works.
TAPR OHL
Phrases such as quot;Compatible with Scratchquot; or quot;Works with Scratchquot; are permitted provided
that such phrases are not used to imply that MIT endorses you or the Derivative Work.
3. The schematic diagram, printed circuit board design files, and firmware source code for
any Derivative Work based on the Design shall be made readily available to the public, ideally
....
on a public web site, free of charge.
THE DESIGN IS PROVIDED quot;AS ISquot;, WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT
SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM,
DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR
OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE DESIGN OR THE
USE OR OTHER DEALINGS IN THE DESIGN.

9. Passion
If we don’t need to fulfill
requirements, we can see
more things to come!
the most selfish act will benefit our society

10. + Selfishness
Selfishness = Credit

11. Reference
Eagle Software:
http://www.cadsoftusa.com/
Open Source Hardware by Adafruit.com
http://www.slideshare.net/adafruit/open-source-hardware-overview
Sensor Board by MIT Media Lab
http://scratch.mit.edu/files/scratchboard/ScratchBoard_Tech_InfoR1.pdf
Instructables
one example of “Very Kind Open Source”
http://www.instructables.com/
Open Source is A Company, Social Media is A Country
http://www.longtail.com/the_long_tail/2009/03/open-source-is-a-company-
social-media-is-a-country.html