Techniques

== Colaberation through social bookmarking == -this involves something like del.icio.us and a webpage.

Printed circuit board fabrication

Homebrew

• Toner Transfer -- This method involves laser printing your PCB design onto paper, then transferring toner onto copper-clad board.
• Photoetching -- Exposure of PCB designs onto photosensitized copper-clad board.
• Chemical Etchants

Commercial PCB fabrication

• Submitting PCB's for fabrication -- Common processes for submitting PCB's for fabrication.
• PCB Manufacturers

Circuit construction (non PCB)

• Solderless protoboard (Wikipedia:Breadboard)
• Point-to-point (Wikipedia:Point-to-point construction)
• Wirewrap
• Dead bug style -- and a similar method, "A Modern Breadboarding Technology: Insulating Pads Soldered to a Ground Plane"
• Manhattan style

Soldering techniques

• Basic soldering -- How to use a soldering iron.
• Surface Mount
  • Skillet reflow
  • Toaster oven reflow
  • Hot air soldering
• Rework -- Techniques for fixing mistakes.
  • official NASA recommendations for adding discrete wiring ("jumper wires") to PCBs

software design tools

Some people still build circuits without ever using any software tools. For complicated circuits, software design tools can save a lot of time.

Here we list "suites" that combine schematic capture, component editor for the components used in schematic capture, circuit simulation, PCB layout, autorouter, and footprint editor for the footprints used in PCB layout. (Is there another place for listing stand-alone tools such as a switching power supply "wizard" and a RF analysis tool?)

Quite often people mix-and-match tools -- using a schematic capture from one suite to generate pretty schematics and a netlist, then importing the netlist a third party Specctra autorouter, then importing the result into a PCB layout program from another suite for the final manual clean-up and design rule checking.

In no particular order:

• gEDA http://geda.seul.org/ ; gEDA wiki -- free version; open source
• McCAD EDS Lite http://mccad.com/ -- free demo version available for download, 200 pin limit
• McCAD EDS SE is free with the book "Apple I Replica Creation" -- supports 750 pins, 11"x17" sheet size, 6-8 data layers.
• FreePCB http://www.freepcb.com/ -- free version; open source

<tangent>(any useful tips in this book for those who want to build a CPU from scratch?) <reply>No, there are not. The book is more entry-level. - Tom Owad</reply></tangent>

• Protel DXP http://altium.com/ ; independent Protel users FAQ
• Eagle http://cadsoftusa.com/ ; http://cadsoft.de/ ; Eagle tutorial from Sparkfun ; another Eagle tutorial -- free demo version available
• DipTrace http://diptrace.com/ -- free 30 day demo version available for download.
• WinQcad http://winqcad.com/ -- free demo version (up to 499 pins) available for download

(Should I make a huge grid here, with checkmarks for "runs on Mac", "runs under Linux", "open source", "includes autorouter", etc. ?) (yes!! yes you should!! now get back to work slave!!)

Another list of software design tools at the Massmind.

Checklist for "The flow of PCB fabrication/PCB 製作流程" using Software Design Tool

• Format and shape of PCB are conformed./底板的幾何圖形和尺寸確認
• Via size and location are conformed./定位和開孔尺寸確認
• Fixed location item are placed on suitable place./對有所要求之硬件放置的明白確認
• A one-first PCB silk layout is made./做一張1:1的PCB白油圖
• All item get enough clearance between them./所有硬件排放後檢查相鄰是否過於緊貼
• All vias get enough size to install them components./所有孔徑是否符合要求
• Make sure no worng footprint is created./肯定了腳銲盤無錯誤
• PCB is drew./完成了PCB
• Netlist is ran and got a no error result./執行netlist指令直無錯誤
• DRC is ran and got a no error result./執行DRC直至無錯誤
• Location of item is reasonable./模擬實物放置是否合理
• All items are put on to a hard copy of PCB./放置所有零件在影印本的PCB上
• Overall is checked./全面檢查確認無誤