[Discover] Transistor Circuits http://www.kpsec.freeuk.com/trancirc.htm (electronics transistor reference transistors)
 [Discover] All About Circuits : Free Electric Circuits Textbooks http://www.allaboutcircuits.com/ (electronics reference circuits books)
 [Discover] Timer/Oscillator Tutorial http://www.uoguelph.ca/~antoon/gadgets/555/555.html (electronics timer circuits tutorial)
 [Discover] uC Hobby " Blog Archive " Arduino LCD Interfacing Part 1 http://www.uchobby.com/index.php/2007/07/07/arduino-lcd-interfacing-part-1/ (hardware lcd arduino avr)
 [Discover] Electronic Learning Series http://home.maine.rr.com/randylinscott/learn.htm (tutorial timer circuits electronica)
 [Discover] Scientists Create First Memristor: Missing Fourth Electronic Circuit Element | Gadget Lab from ... http://blog.wired.com/gadgets/2008/04/scientists-prov.html (computing science engineering memristor)
 [Discover] Arduino playground | Main / RotaryEncoders http://www.arduino.cc/playground/Main/RotaryEncoders (switches circuits hardware encoding)
 [Discover] Free PCB design software - Printed circuit boards manufacturing http://www.pad2pad.com/ (stumble pcb printed board)
 [Discover] Using Transistors As Switches http://www.rason.org/Projects/transwit/transwit.htm (transistors circuits switch electronics)
 [Discover] AM band Transmitter http://www.techlib.com/electronics/amxmit.htm (circuits radio electronics)
 [Discover] and 556 Timer Circuits http://www.kpsec.freeuk.com/555timer.htm#monostable (timer circuits design electronics)
 [Discover] Green Thumb http://www.xs4all.nl/~sbolt/e-groeneVinger.html (orgatronics circuit pcb plant)
 [Discover] http://ourworld.compuserve.com/homepages/Bill_Bowden/page5.htm http://ourworld.compuserve.com/homepages/Bill_Bowden/page5.htm (led circuit electronics)
 [Discover] YouTube - Worms Making Music II http://www.youtube.com/watch?v=Lb4jOCAr8ow (circuit bending)
 [Discover] LED Hard Drive Clock 3.5" http://www.ian.org/HD-Clock/ (hardware led projects circuits)
 [Discover] Electronics Club, Kelsey Park School http://www.kpsec.freeuk.com/index.htm (reference projects diy components)
 [Discover] CostaRica Beam http://costaricabeam.solarbotics.net/index.htm (circuits robot beam electronics)
 [Discover] Easy to build CNC Mill Stepper Motor and Driver circuits - Instructables - DIY, How To, tech - Entry http://www.instructables.com/id/Easy-to-build-CNC-Mill-Stepper-Motor-and-Driver-ci/ (cnc circuit stepper motor)
 [Discover] alcaline battery charger http://www.afrotechmods.com/reallycheap/batteries/batts.htm (diy reference circuitbending tools)

 [Discover] Simple Microphone Preamplifier http://web.archive.org/web/20050207133505/www.hut.fi/Misc/Electronics/circuits/micamp.html (recording circuits diy amplifier)
 [Discover] MAKE: Blog: HOW TO - Make Printed circuit boards - An illustrated guide (and round up) http://blog.makezine.com/archive/2008/01/how_to_make_printed_circu.html?CMP=OTC-0D6B48984890 (pcb diy buildme circuit)
 [Discover] Voltage Comparators http://home.cogeco.ca/~rpaisley4/Comparators.html (opamp circuit comparator electronics)
 [Discover] www.Bioject.org " Blog Archive " Photophobes http://insitu.lri.fr/~labrune/blog/2007/07/23/photophobes/ (circuits piezo organic solar)
 [Discover] DC DC converter : DC DC converter schematic description http://www.seven-segments.com/index.php?action=pageshow&id=56&idcat=41&PHPSESSID=3387343 ... (circuits diy powersupply converter)
 [Discover] www.circuitstoday.com - Electronic Circuits http://www.circuitstoday.com/ (circuits diy howto electronics)
 [Discover] DPRG: A Simple PWM Circuit Based on the 555 Timer http://www.dprg.org/tutorials/2005-11a/index.html (pwm circuits howto electronics)
 [Discover] code, circuits, & construction :: Motors http://www.tigoe.net/pcomp/code/motors (circuit motor arduino)
 [Discover] Circuits-Lab.com http://www.circuits-lab.com/ (circuit schematic free electronics)