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Electronics Project Design Schematics and circuit diagrams FC's Electronic Circuits FC's Circuit Archive contains many electronic circuits that I have designed and documented. I have attempted to include a number of unusual circuits, with an emphasis on useful applications over simple toy circuits. The majority of these projects can be built with readily available discrete components. Only a few of the circuits here rely on microprocessors. Bucking that trend, the Arduino platform is an easy to learn microprocessor platform with a free software development environment that is so popular it should be around for many years. Most of the circuits on this site have been drawn with the open-source and cross-platform XCircuit circuit drawing program. I'm a big fan of the Linux operating system. Linux makes a great platform for dedicated systems: take an older computer, install Linux and the appropriate free software utilities and turn it into a specialized device.

Homo ludens electronicus My interest in electronics started when I was 12 years old, although I had built electric devices (lighting systems, flashlights, solenoids, even a motor) much earlier. At age 12 I started the real thing: Radios, sound effect generators, light games, etc. This obsession of building things led to a career in electronics, but also it has become my most interesting hobby. I regularly design and build things, and now I will share my better documented projects with you. Each of the following links leads to a page giving constructional information (schematics, sometimes printed circuit layouts, and text) for an electronic project. Power supply and switching technology 13.8 Volt, 20 Ampere linear power supply: A semi-traditional power supply for communication equipment, using negative-rail regulation with grounded pass transistors in a configuration that gives some unique advantages. 160 Volt, 3 Ampere DC motor power supply: A very compact, efficient and simple off-line buck regulator. Audio

Technical Library Electronics/Symbols Electronics | Foreword | Basic Electronics | Complex Electronics | Electricity | Machines | History of Electronics | Appendix | edit Power Sources[edit] Grounds[edit] Resistors[edit] Capacitors[edit] Transformers[edit] Diodes[edit] Transistors[edit] Switches[edit] See here for more examples: [1] Greek characters[edit] One reason people don't understand math or Physics very well is that it literally is Greek to them. alpha αbeta βgamma γdelta δepsilon εzeta ζeta ηtheta θiota ιkappa κlambda λmu μnu νxi ξpi πpiv ϖrho ρsigma σsigmaf ςtau τupsilon υphi φchi χpsi ψomega ωGamma ΓDelta ΔTheta ΘLambda ΛXi ΞPi ΠSigma ΣUpsilon ΥPhi ΦPsi ΨOmega Ω Examples: Circuit_macros Version 7.13 These diagrams are in .png format. Pdf and svg versions are also available. The Postcript equivalent can be found in examples.ps of the distribution. Click on the link to view the source of each diagram. Read the manual CMman.pdf for a complete explanation. Browse and enjoy! quick.m4: The quick-start example from the manual CctTable.m4: Two-terminal elements, showing some variations Diodes.m4: Diodes Emarrows.m4: Radiation arrows Sources.m4: Sources and source-like elements Variable.m4: Arrows and marks indicating variability AmpTable.m4: Macros amp, delay, and integrator Fuses.m4: Macros fuse and cbreaker Switches.m4: The switch macros; switch(,,,L|B|D) is a wrapper for lswitch, bswitch, and dswitch Grounds.m4: Ground symbols Antennas.m4: Antenna symbols Audio.m4: Audio elements Opamp.m4: The opamp Xform.m4: The transformer element, drawing direction down Relay.m4: The contact and relay macros NPDT.m4: Double throw with the NPDT macro Jack.m4: The jack and plug macros Pconn.m4: The pconnex macro ex01.m4:

allwinner a10 The Allwinner A10 CPU has been developed in, and is sold in, the People's Republic of China. Its mass-volume price is around $7, yet it is a 400-pin highly feature-rich 1.2ghz ARM Cortex A8 with a MALI400 GPU. It has the distinction of having the highest bang-per-buck ratio of any SoC available at the time of writing, by quite a margin. Its price and features is causing massive disruption of the tablet market in China (a minor recession was caused by widespread cancellation of prior committments to other SoCs!), as every factory in Shenzen scrambles to compete with hundreds of other factories for the same end-user market: tablets and PVRs. For comparison: TI has brought out a new $5 ARM Cortex A8, but it is limited to 500mhz and it is extra cost for the version with a PowerVR 3D GPU. Preorders If you would like to register your interest in an EOMA-68 CPU card with an Allwinner A10 CPU, please follow the instructions at the orders page. News Updates are available at the news page.

pcb This page is in note-form for convenient reference, for ongoing development of the CPU Card Schematics. Updates are available at the news page. The schedule is as follows: Begin creating libraries, parts and layout in KiCAD (lkcl). Note: here is a link to a tablet which has had FCC approval: the documents filed with the FCC include schematics that are very similar to the wits-tech EVB schematics: Qing Pricing 100k HDMI micro Type D. 2.5RMBMicro USB AB. 1.2RMB4in audio. 1.2RMBMicro SD slot. 2RMB status: all parts look good, qingpei requested samples 21mar12, to be sent to bari on receipt. Henry Pricing 100k Molex Micro HDMI Type D 46875-3011 MOQ 4K $0.94 each 5 weeksMolex Micro USB AB 47654-0001 MOQ 7.5K $0.24 each 7 weeks TODO: obtain photos, double-check parts. DuSeven pricing 10k (RMB) status: 100k negotiable, photos (directly above!) Components Debugging Tools

Hobby microcontrollers and electronics