! Making your own Open Source Hardware Arduino Shield with Fritzing. Justin Mclean

Transcription

1 ! Making your own Open Source Hardware Arduino Shield with Fritzing Justin Mclean

2 Make Your Own Arduino Shield Want to make your own shield Have limited electronics experience Just solder basics or has a friend who does Never made a PCB before Want to keep costs low

3 Why Arduino? Large community Low cost / low power Easy to program Many form factors

4 Arduino IDE

5 Rapid Prototyping Can go from prototype to real product quickly Can extend hardware (arduino shields) or create single PCB Arduino and arduino components are easy to get

6 Clyde

7 Inside Clyde

8 Pebble

9 Pebble Prototype

10 Process Proof of concept Working prototype Design PCB Generate PCB design files Manufacture PCB Finished product

11 Arduino Shield Open Source Hardware Simple LED shield with a simple application Low cost Easy to make

12 Breadboard

13 Prototype

14 Prototype (back)

15 PCB layers Top silkscreen Solder Solder mask Copper Board Drill holes

16 PCB Design Software Eagle - not OS or free, low cost version has restrictions KiCad - OS complex but powerful Fritzing - OS simple designed for Arduino Platform Several online commercial services have sprung up

17 Fritzing Open Source for Mac Windows and Linux 3 views, breadboard, circuit diagram and PCB Easy to use mostly drag and drop What you do in one view effects others

18 Fritzing Large library of parts Auto route not very useful Breadboard view not compact Easy export of files

19 Breadboard View

20 PCB View

21 Exported Files

22 Check Your Design

23 PCB ordering services Hackvana OSH Park Seeed Studio Fusion PCB

24 Boards

25 Board (back)

26 Board (back)

27 It works!

28 I can t wait 2-3 weeks! Can pay more to quicker turn around Can use chemicals to etch boards and use surface mount or drill holes by hand Can use CNC machine to etch and cut and drill

29 Access to Tools 3D printers, CNC, Laser cutter - help with rapid prototyping and reduce cycle time from weeks to days Need access - join a local hacker group / maker space

30 CNC Machines Opposite of a 3D printer Smaller, cheaper, better software Can cut metal, wood, plastic, wax + more Can do 3D as well as 2D Othermill and Otherplan software (free) Slowish (compared to laster cutter)

31 Othermill

32 Otherplan

33 CNC cut board

34 CNC cut board

35 CNC issues OtherPlan supports gerber files Takes about 30min to 45min for each side Copper rings may need extra support May need to modify some traces No solder mask No copper in holes between sides

36 Surface Mount Components Just about all costumer electronics use very small surface mount components Generally cheaper and more variety than through hole Fritzing supports through hole to SMD

37 How Small?

38 SMD Boards Need vias to join board sides Hard to manually solder smaller parts but possible Fritzing supports through hole to SMD

39 SMD version

40 Making One is Easy Through hole components or large SMD components Components are cheap (but cheaper in quantity) Solder it together in 10 or 20 minutes But what if you want to make 10?

41 Scaling Up Rig

42 Scaling Up Rig

43 Testing Board Test before everything is soldered Pogo pins + prototype board Example demo code to test board

44 Testing Rig

45 Stackable

46 What Else? Licensing Documentation Packaging Examples Hosting Shipping

47 OS hardware Different from OS software Patent or trademark protection - several years and expensive Does it matter if someone can make it cheeper than you?

48 Licensing GPL style - CERN and TAPR Apache style - Solderpad Creative Commons

49 Documentation OSH needs to be documented PCB Design files Bill of materials Step by Step building instructions Example working software

50 Example Code Basic test program Control LEDs via serial Control LEDs via ethernet (REST + WebSockets) Control LEDs via WiFi

51 WebServer Code

52 Hosting Open hardware Hub SolderPad Upverter

53 Packaging Prototype

54 Packaging (prototype)

55 Digital Fabrication Laster cutter Online services 1-2 week turn around May have to work with both imperial and metic units (a pain!)

56 Laser cut files

57 Manufacturing Seeed Studio PCB Assembly Can make in quantities as small as 100 Standard library of parts for quick turn around Cost is lower than you may expect

58 Making 100 Boards Need gerber files and bill of materials Need testing plan / documentation SMD has higher set up costs and may not be possible to go in smaller runs

59 Questions? Ask now or me at Ask me on