Electronic Circuits on Circuit Exchange International (CXI) Xenon Flasher This discussion covers 3 different Xenon flashing circuits from disposable cameras. From them, you will learn circuit tricks that have NEVER been shown in any theory book. The first circuit covers 6 BUILDING BLOCKS. You will need an old "disposable Flash Camera" plus two extra parts to carry out the modifications. The first circuit comes from a Fuji camera: You are going to like this project. THE BUILDING BLOCKS This project has 6 separate building blocks: 1. WARNING This project generates 350V DC and stores the voltage in a large electrolytic. 1. The feedback winding is connected between the 220R resistor and the base of the transistor. 2. 3. 4. 5. 6. MORE ON THE "CIRCUIT" Unfortunately this project cannot be left in a "ready" state as the circuit consumes about 250 - 300mA just to keep the electrolytic charged and a single cell will last only a few hours. DIFFERENT CIRCUITS Unfortunately not all flash units are the same.
RF Remote Control --- How to build a simple remote control system --- Note: Ming no longer manufactures the RE-99 receiver & TX-99 transmitter RF components. We will leave this project up for users that may still have the Ming RF components. If you plan to build this project, simply replace the RE-99 receiver & TX-99 transmitter with the RWS-434 & TWS-434A RF receiver & transmitter modules found HERE . Due to the huge interest in this project, I have just recently finished the NEW schematics. This project uses the Ming TX-99 V3.0 300 MHz AM, RF Transmitter module shown below for transmitting data. The photo above shows the Ming TX-99 V3.0 . Here's a quick sample of how to configure a switch to power up the transmitter and enable the transmission: Transmit Switch Configuration Using the pushbutton switch to make/break the ground connection for the power circuit to your transmitter, you save power and only transmit data when you push the switch. Note: Ming now has a new version of the RE-99. Click HERE For
SchematicsForFree.com 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. Compact fluorescent lamp Menu Introduction Compact fluorescent lamps have some benefits in comparison with classic light bulbs. Fluorescent lamps are available usually in these color temperatures: Warm white (2700K) Cool white (4000K) Daylight (6000K) Most often we meet with "warm white", which is close to classic bulb and which is most pleasant to people. Electrical construction Princip of function we explain on a LUXAR 11W lamp. Lamp start R6, C2 and DIAC mades first pulse to base of transistor Q2 and cause his opening. Normal operation When the gas is ionisated in a pipe, C3 will be practically shorted and thanks to this frequency goes down and changer is now drived only by C6 and changer generates much lower voltage but enough to keep the light on. Failures Common failure is broken capacitor C3. it is possible mainly at cheap lamps, where are used cheaper components for lower voltage. Repair of electronics Repair of electronics usually means change of capacitor C3 if he is brobek. Mechanical construction Reviewing
How to Automate Your House With Your iPhone The iPhone’s ability to connect to wireless systems via Wifi and/or Bluetooth opens up a wide range of potential devices that the iPhone can control. This functionality isn’t limited to your television or stereo but expands over a variety of electronic equipment in your home. Today we’ll take a brief look at ten iPhone applications that are built to control elements of a home automation system. Examples include everything from video cameras and security systems to lighting rigs and automatic blinds. What will you control? Read Before You Buy The big disclaimer that you should be aware of before buying any of these apps is that almost all of them require extra hardware of some sort. Needless to say, many of these apps are targeted at serious technology geeks already familiar with home automation technology. HomeWorks Light Control Required Hardware: A Lutron HomeWorks System (more info…) CozyHome “With CozyHome you will be able to control and monitor your home automation systems. House Control
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
101 - 200 Transistor Circuits e-book. It contains a further 100 circuits, with many of them containing one or more Integrated Circuits (ICs). It's amazing what you can do with transistors but when Integrated Circuits came along, the whole field of electronics exploded. IC's can handle both analogue as well as digital signals but before their arrival, nearly all circuits were analogue or very simple "digital" switching circuits. Let's explain what we mean. The word analogue is a waveform or signal that is changing (increasing and decreasing) at a constant or non constant rate. But let's crawl before we walk and come to understand how to interface some of these chips to external components. Colin Mitchell TALKING ELECTRONICS. To save space we have not provided lengthy explanations of how the circuits work. KIT OF PARTS Talking Electronics supplies a kit of parts that can be used to build the majority of the circuits in this book. MORE INTRO There are two ways to learn electronics.