SmaTrig - 15-in-1 trigger for SLRs The SmaTrig is a compact, AVR microcontroller based multi-function flash or camera trigger. Its 15 modes of operation make it come in handy in many situations. Besides the interval modes for time-lapse photography it is equipped with sensors for light and sound for capturing short-duration events or high-speed photography. Trigger modes Manual triggerBulb exposure (switch toggles state)Flash trigger2nd flash trigger (TTL)Lightning trigger (uses mirror lock-up)Sound triggerInterval exposure 2.5 minInterval exposure 1 minInterval exposure 32 secInterval exposure 16 secInterval exposure 8 secInterval exposure 4 secInterval exposure 2 secInterval exposure 1 secInterval exposure 0.5 sec Manual Trigger - This is the simplest mode of operation. BULB exposure - Pressing the pushbutton toggles the trigger between open and closed. Flash trigger - In this mode the camera is triggered directly by the photo-diode. The operation is explained in the following. The Circuit Low power considerations Parts
Futurlec, The Electronic Components and Semiconductor Superstore Hobby Engineering Home Page Understanding Schematics You can see that there are various bits represented by symbols, all connected in various ways. Let’s look at some of the big picture concepts: Left to Right: The first thing to notice is that you read the schematic left-to-right: the input on the left feeds the signal through parts and pathways in the middle to an output on the right. This left-to-right convention is not universal, but it is probably the most common layout for a schematic. Power and Ground: The top area of the schematic shows some type of power (in our case, 9 volts Direct Current, the same thing that comes out of a 9 volt battery). Each symbol shows a part number and a part value or type. Connections: The connections between components are shown by lines. Figure 1.2: Various Ways of Depicting Connected Lines In the first example on the left, a dot shows interconnecting lines. Inputs and Outputs For stompbox designs, you almost always have an input and an output. Figure 2.1: Shorthand Depiction of Inputs and Outputs Power
SOS electronic 101 Spy Gadgets for Evil Geniuses Finding Parts - Hobbyist / Surplus Sites The data on the "Finding Parts" pages is actually all in a Wiki (a webpage that anyone, even you, can edit!) If you have suggestions or ideas for other companies or sources you can post it in the forum but it might be faster and easier to just edit the wiki page yourself! (You'll have to make an account "Not the best, but still a good deal" This is not an exhaustive list, but these are my favorite surplus locations. Check in for specials, sales, and limited-quantity items. General Surplus parts and components Dan's Small Parts and Kits A wide variety of transistors, diodes, inductors, caps, crystals, discreet RF devices, standoffs, connectors etc. Evil Mad Scientist Laboratories lots of fun kits, cool "BulbDial" clock, awesome 12" and 2.3" 7 segment displays, LEDs, ICs, Servos, Stepper motors, tools, Proto and bread board stuff. Tayda Electronics DigiKey eCrater Lots of random stuff on the rest of the website. Engineering Shock Electronics Maplin Sparkfun Electronics Mouser Electronics
10 Best Electronics Suppliers First off, I would like to give notice to Electronics Projects for Dummies for most of this info. I wanted to make a site with many of the best sites to buy Electrical Parts, because it can sometimes be a strenuous activity. I have 10 here, because if you can't find something on one online store, you might be able to find it on the next. Reynolds ElectronicsReynolds Electronics is a good supplier of remote control components, micro controllers, and robot kits and parts. One feature that stands out on Reynolds Web site is the clear and helpful project/circuit tutorials. You can also find links for educational books on topics such as robotics and microcontrollers. Hobby EngineeringHobby Engineering is a sit slanted towards the hobbyist. All ElectronicsAll Electronics has an incredible selection of many of the useful items you would use to build your project. Jameco ElectronicsJameco has a very nice site catalog. Like Digi-Key, Mouser provides a very large catalog.
ELECTRONICS HOBBYIST Other Pages Here: NOT YOUR AVERAGE CONSTRUCTION PROJECT (Weird stuff!) Try searching amazon.com : Electronic Parts misc high voltage Antique radio, TV, phone ANTIQUE: science/medical COLLECTIBLES: science/medical Test Equipment Lab Equipment Vintage computer , brings back memories. Night Vision Electrostatics , also electro-static , also static Antiques:static Sci. x-ray tubes , xray , and Crookes Rocks: radioactive Rocks: meteorite Weird Weird:Bizarre 'science' Quack Medical Devices , 'Quackery' , Quack med. section Ultrasonic (no cleaners, etc.) also Piezo 'apparatus' eBay login Sodium Iodide , Scintillator , Scintillation Who Would Buy THAT?! Last Minute Auctions Scroll down... Slashdot , Sci Update , wrth1K , , edge , Fark , NewScientist , , , , Halfbake , Scimatters , , , Flikr Kuro5hin , Scienceblog , iHacked , Hackaday , Tech UG , How2 , cooltools , ipodder , Naked-sci , NPR SciFriday Mindhacks , digg , , DiyH , , Huge , HAKGADGT , VIMEO , GVid , mCafe , youTube , , scroll down High Volts .HV Community
Hobby Engineering Single Op-Amp Twin-T Band-Pass and Notch Filter | Simple Circuit Diagram This is a Single Op-Amp Twin-T Band-Pass and Notch Filter circuit. This circuit uses the twin-T topology which requires one or two op amps and three resistors and three capacitors. That’s mean this topology based on a passive (RC) topology. The component values are determined by following equation: Bandpass configuration: C1 = C2 = C R1 = R2 = R R3 = R/2 C3 = 2C Fo=1/(2pRC) R4 and R5 are used to control gain with R4>100*R5 Notch configuration: R1 = R2 = R C1 = C2 = C R3 = R/2 C3 = 2C Fo = 1/(2pRC) R4=R5:HIGH If the components are matched too closely, the bandpass circuit will oscillate.