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Build the BASIC SPY TRANSMITTER - Page 1 of 16

Build the BASIC SPY TRANSMITTER - Page 1 of 16
Build the 2 transistor Spy Transmitter Radio frequency projects can seem more difficult than most electronics projects because most of the time you cannot build them on a solderless breadboard and there may be parts used that are not easy to source such as coils and adjustable capacitors. This project is focused towards those who have not yet attempted to build any kind of RF project, and it is laid out in such a way as to make it easy to explore the basic principles of RF circuitry and ensure a successful final product. This simple 2 transistor audio transmitter will send the sounds picked up in a room to any FM radio tuned to the same frequency as the transmitter, somewhere between 80 and 100 Megahertz. Figure 1 - You can salvage most of the parts needed from an old radio Since many of the parts only need to be "close enough", you will probably be able to salvage all that you need from any old radio, TV, or RF based circuit board. You are Viewing... Related:  Electronic Circuits

Mike's Electric Stuff 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. 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 The AVR Butterfly (ATAVRBFLY) made by ATMEL comes with a preloaded application. For german readers: Der Quellcode der auf dem AVR-Butterfly installierten Applikation wird von ATMEL für den IAR C-Compiler zum Download bereitgestellt. Even if you do not own an AVR Butterfly you may find usefull information in the BF application code for general ATMEL AVR development tasks. From the gcc-port of the application code some methodes how to convert IAR-code to avr-gcc/avr-libc-code can be learned. Butterfly gcc-port history Software 2.Oct.2003 - 4.

Gadget Factory > Projekte > OpenBench Logic Sniffer > Home OpenBench Logic Sniffer is an open source logic analyzer hardware design. It’s purpose is to provide a hardware platform for the SUMP logic analyzer at the lowest possible cost. This project started in the comments on a post. The OpenBench Logic Sniffer is a purpose-built logic analyzer board designed to be low cost but high speed. 70MHz+ sample speeds 32 channels 16 buffered, 5volt tolerant channels USB interface, USB powered USB upgradable everything Make it as DIY as possible Make it as open source as possible $30-$40 price range We didn’t quite hit our initial price range, but we got really close. You can get your own assembled Open Logic Sniffer at Seeed Studio for $45, including worldwide shipping. Block Diagram Windows Quick Start Video UART Demo Video

Hobby projects - Simple electronic circuits Computer microphones Learn how to interface electret and dynamic microphones to the standard computer sound card. Metal detectors Theory of operation and schematics of the most common metal detectors used today: Very Low Frequency (VLF), Pulse Induction (PI) and Beat-Frequency Oscillator (BFO). Wireless microphone The wireless microphone transmitter can be built in an afternoon with simple, affordable and widely available parts.

How-To: Make a solid-state A/V switcher Ben's Solid State A/V Switcher. Comes in any color you'd like as long as it's black. As you probably recall we recently had several articles on the Wii laptop which, of course, has Virtual Console game emulation. But what about people who'd prefer to have, say, every system they own hooked up all at once to one TV? Or a full-featured standalone DVD player and an Xbox 360, both using component video? While "solid state" may bring bring to mind electronics from the 60s (or, in some cases, yet-unreleased flash hard drives), but in this case it simply means the actual switching is done with circuitry, not mechanically. In this How-To we'll show you how to wire up your own A/V switcher which you can expand and use any way you'd like, for composite, S-Sideo, component, even VGA signals. For this project's example we'll be building a 3 input, single output composite video, left / right audio switcher. Parts list Here's the electronics we'll need to build this project. Other things you'll need:

University: Volts, Amps, and Ohms Operational amplifier applications This article illustrates some typical applications of operational amplifiers. A simplified schematic notation is used, and the reader is reminded that many details such as device selection and power supply connections are not shown. Operational amplifiers are optimised for use with negative feedback, and this article discusses only negative-feedback applications. Practical considerations[edit] Op amp parameter requirements[edit] In order for a particular device to be used in an application, it must satisfy certain requirements. have large open-loop signal gain (voltage gain of 200,000 is obtained in early integrated circuit exemplars), andhave input impedance large with respect to values present in the feedback network. With these requirements satisfied, the op amp is considered ideal, and one can use the method of virtual ground to quickly and intuitively grasp the 'behavior' of any of the op amp circuits below. Component specification[edit] Input bias currents and input offset[edit] When

Handbook of hardware pinouts, cables schemes and connectors layouts So You Want to Use PWM, Eh? | Non-Lexical Vocables Pulse-width modulation. It probably sounds a little confusing if you’re new to electronics. Kindof a word mashup, really. What do pulses, width, and modulation have to do with each other anyway? I remember first learning about PWM during my freshman year of college at RPI. Say you’ve got a light-emitting diode (LED) and a battery. Imagine you could connect and disconnect the LED and battery multiple times per second, causing the LED to flash or pulse (see graph above). Now in case you’re imagining yourself frantically flipping switches on and off, or tapping wires against battery terminals, you can stop. So what’s PWM good for, anyways? Now you may be wondering why I’m writing about PWM all of a sudden. But have you ever noticed that on some cars (e.g. By the way, if you’re ever trying to determine the frequency of a blinking light, just snap a couple pictures while moving your camera (or the light). I’m thinking this long-exposure shot might also pass as modern art in some circles.