Arduino The Documentary (2010) #Amazing!!! Electronics DIY - Electronic Schematics FM Transmitters TV Transmitters Stereo Transmitters. DIY Cymatics Display. A simple vibrating platform can be made from a piezoelectric sounder mounted on a plastic tube.
The piezo sounder can be connected to a signal generator or even a PC sound card. By placing a small amount of powder or fluid on the sounder, various patterns and motions can be seen depending upon the applied frequencies. This image shows a pattern formed by a fine powder vibrating at a single, mid audio range frequency. Depending upon the size of your sounder and the materials used, the patterns will emerge at a range of frequencies. Sometimes a pattern will only remain stable at one exact frequency, whereas other patterns will emerge over a broad range frequencies.
Different materials will respond in different ways to the vibrations due to varying density or particle size and shape. This diagram shows a flat Piezo sounder glued to the top of a small section of tubing for support. There should only be a pinch of powder such as salt placed on the sounder to see the effect. Bipolar junction transistors as switches : Worksheet. Question 1: Solid-state switching circuits usually keep their constituent transistors in one of two modes: cutoff or saturation.
Explain what each of these terms means. "Cutoff" refers to that condition where a transistor is not conducting any collector current (it is fully off). "Saturation" means that condition where a transistor is conducting maximum collector current (fully on). Follow-up question: is there such a thing as a state where a transistor operates somewhere between cutoff (fully off) and saturation (fully on)? Notes: In all fairness, not all transistor switching circuits operate between these two extreme states. Question 2: Explain the function of this light-switching circuit, tracing the directions of all currents when the switch closes: Notes: Ask your students to explain what possible purpose such a circuit could perform. Question 3: If switch SW2 were opened (and switch SW1 remained closed), what would happen to the currents through R1 and R2?
AVR projects and AVR Butterfly gcc port. By Martin THOMAS G.d.W.
SS2010 FHFFM You may like to visit my ARM-Projects page too (projects and information for NXP LPC2000, Atmel AT91SAM7, STmicro STR7, STM32, LMI LM3S and other controllers with an ARM-core). Last update in the ARM-section: 25. Apr. 2012. Available Projects and Information (Content) "Last updated" may be just additional information not always a new version of a software-package. AVR Butterfly Application code port to avr-gcc Introduction. How Do I Put Together a Tech Survival Kit? @wjglenn: I'm one of those people who would use a wire cutter and screwdriver for all of these things @rathat: If you can use a wirecutter and a screwdriver to write labels, replace a bad monitor cable, or back up somebody's documents, I'm duly impressed.
I suppose you could use them for malware removal, but I'm not sure how useful the computer would be afterward. @wjglenn: I have a PC toolkit bought from a school bookstore, which contains stuff like a screwdriver, pillbox (for screw separation) a nut driver, and some other tools but I also have a 4 gig flash drive (not with it, but available if necessary) which contains setup file for malware bytes, and It might have setup for avast too (can't remember) but it also has a copy of portable Firefox of course, I also have a penny in the toolkit, which just sort of showed up at some point during that semester in there and I figured I would just leave it in there.
Good idea for flash drive. Marker does not always last forever. Make A TRON Bag - How to use EL (Electro Luminescent) Wire. Cornfield Electronics - Maker Faire Page. By Mitch Altman, and friends.
You Can Make Cool Things With Microcontrollers! The projects on this page were all created for total beginners, with no experience, to complete successfully at my workshops, or at home, or anywhere! All you need is a desire, a handful of parts, a soldering iron (with stand and sponge), a wire-cutter, a wire-stripper, solder, and an afternoon. Soldering! Soldering is fun! I taught Andie Nordgren to solder, and she enjoyed it so much she now teaches others! Click the image for a larger version, or download the PDF in English, in French, in Czech, in Romanian, in Portuguese, in German, in Spanish in Italian, or Morse Code! Soldering Is Easy! Me and Andie Nordgren and Jeff "mightyohm" Keyzer have created a complete comic book to teach people who know nothing how to solder: Please click on the above graphic to download your free copy of our complete "Soldering Is Easy!
" MiniPOV! Many of the projects on this website are made by hacking the MiniPOV! Ordering Parts. Soldercomic.jpg (JPEG Image, 1275x1651 pixels) Circuits.