background preloader

General Electronics II

Facebook Twitter

Info: Variable inductors used in HF antenna matching networks. Home. Using laser pointers for voice communications. - Index. The 10 Most Common National Electric Code Violations. To help you understand which electrical protection goes where, consider what each type of breaker was designed to do and make sure to follow the national electric code.

The 10 Most Common National Electric Code Violations

Standard Circuit Breaker Circuit breakers protect home electrical wiring and equipment like furnaces, air conditioners, dryers and stoves. Standard circuit breakers are better at protecting wiring and equipment than preventing fires and protecting people. That’s why they have largely been replaced by GFCIs and AFCIs. How to build a bluetooth speaker. A do-it-yourself adventure. Let’s be honest.

How to build a bluetooth speaker. A do-it-yourself adventure.

We can’t put down our phones long enough to plug them into a speaker. Bluetooth to the rescue! With a love of all things DIY, I built my own set and thought I’d share the experience for anyone else looking to do the same. The basic components only cost about $35, although cost depends on how you want the finished product to look. NASA Workmanship Standards : National Aeronautics and Space Administration : Free Download, Borrow, and Streaming. PartsBox: Take control of your parts inventory and BOM pricing. Parts (PartsBox) Software - Introduction to simple sound measurement using a notebook computer. Audio Systems Group, Inc. Publications. Publications More recently, I've been devoting energy to issues relating to various forms of interference to audio systems from both power and radio frequency (RF) sources.

Audio Systems Group, Inc. Publications

You'll also find applications notes for Amateur Radio Operators (Hams).While ASG was in business, I authored a number of articles and application notes to explain design concepts, help our clients understand complex issues, and help users get the most out of their sound systems. They are listed following the Ham Radio topics. Links to Other Useful Websites ON4WW has put together an excellent narrative documenting his work chasing down and eliminating a variety of local noise sources.

Webpages from Ray Rayburn, Rick Chinn, and Bill Whitlock have excellent practical information on the technical side of audo and acoustics. N1CKX Main Page. I am just adding this section.I will be tying this to my You Tube andputting photos of projects and repairs here.For now however I need to update the travelpage as I have neglected this for a couple of years.When this section becomes filled I will add links to the You Tube Videos.NOTE!

N1CKX Main Page

Home page. Home page. PCB Cutter Tool : 9 Steps (with Pictures) - Instructables. Stop Using Ferric Chloride Etchant! (A Better Etching Solution.) : 6 Steps (with Pictures) - Instructables. (Note: I'm an economist, not a chemist.

Stop Using Ferric Chloride Etchant! (A Better Etching Solution.) : 6 Steps (with Pictures) - Instructables

Please leave a comment if you've got any corrections and/or additions to this stuff!) I stumbled on this idea when I saw this website: Etching with Air Regenerated Acid Cupric Chloride by Adam Sechelle. Cupric chloride can be re-used indefinately by topping up the acid levels and adding oxygen (bubbled in from the atmosphere).

Sounds cheap and environmentally friendly to boot. The website's got a lot of good chemistry info on cupric chloride etching. To make the cupric chloride solution, he dissolves a bunch of copper wire in hydrochloric acid, and mentions maybe using hydrogen peroxide to speed up the oxidation, but doesn't go into detail. Which got me thinking. Modification of the Pantum 2502W for Direct Laser Printing of Printer Circuit Boards : 16 Steps (with Pictures) - Instructables. We are now going to take the printer apart a bit (actually quite a bit) and remove a bunch of parts we don't need.

Modification of the Pantum 2502W for Direct Laser Printing of Printer Circuit Boards : 16 Steps (with Pictures) - Instructables

In my E260 Instructables I provided a comprehensive Service Manual that detailed the removal and replacement of most of the key components of the printer. Unfortunately, there seems to be no equivalent Service Manual for the Pantum 2502W, so I have included a lot more photos and descriptive text. If you run into trouble, look at the photos! When you remove screws, but sure to note which screw came from where so that you can replace them correctly when you reassemble the printer. Remove screw located under black and white warning label on the top right side, just in front of the yellow warning label. Making Your Own Solder Paste Stencils. Making Your Own Solder Paste Stencils.

Making Your Own Solder Paste Stencils

Homebrew spectrum analyser. I decided to try my hand at building a spectrum analyser after seeing the design by Roger Blackwell, G4PMK, in the Radio Communication Handbook5.

Homebrew spectrum analyser

I had to adapt the design because I couldn't get the Motorola MC 3356 IC he used. This is an account of what I came up with, how it performed and how it could be improved. Figure 1 is a block diagram of the analyser. Aircraft Transmission Receiver. Using an old RC transmitter to control your Arduino Projects – Brainy-Bits. We all have that old Radio Controlled helicopter, plane, drone… That we bought, played with it once or twice, crashed once, twice, three times, and now it’s just there collecting dust.

Using an old RC transmitter to control your Arduino Projects – Brainy-Bits

Well why not use the transmitter and receiver to control an Arduino project at great distances. The range on even the simplest of RC transmitter is around 300-500 feet, which is much better than any Bluetooth or WiFi connection. Of course compared to those it’s not as versatile and it’s only a one way communication, but for turning on relays or lighting some Led’s it can be very useful. In this tutorial we will see how to extract the values from the RC Receiver (the one that’s in the heli, plane, etc…), and display them in PUTTY, which is more versatile than using the Serial Monitor that’s included with the Arduino IDE software. We will be connecting 2 channels from the RC Receiver, but you can connect as many as are available on the Receiver you are using. Homemade Electronics - Homemade Electronics -

Electronics Projects Circuits. Making Electric Circuits and Other Electronics Projects. Electricity is the energy that fuels machines and devices.

Making Electric Circuits and Other Electronics Projects

Electricity moves through wires that can be either short or very long. Electricity is also transformable into different types of energy, making it versatile. It may seem that electricity and electronics are synonymous, but there are slight differences in these terms. An electrical device generates or uses significant amounts of electrical power. An electronic device has semiconductor components inside it that enable it to control something. Electrical Circuits Design Project (PDF) 1001+ Free Electronics Projects & Ideas for Engineers. Generate Power Using Microturbine. Presented here is the Hydropower Generation circuit that generates power from a water pipe in a building using a microturbine.

The generated electricity can be used to charge batteries, which can be used for emergency lighting or other such purposes. Overhead water tanks are placed on the terrace of the house and filled from the underground sump or borewell using an electric pump for domestic use. Water has high kinetic energy when it flows from a high to low level. Electricity can be generated using this kinetic energy with the help of a suitable microturbine. Hardware Archives – Particle Blog. Uni-Directional WIFI Range Extender: 5 Steps. AdWords We use AdWords to deploy digital advertising on sites supported by AdWords. Ads are based on both AdWords data and behavioral data that we collect while you’re on our sites.

The data we collect may include pages you’ve visited, trials you’ve initiated, videos you’ve played, purchases you’ve made, and your IP address or device ID. Selecting a Step Motor and Driver for an Arduino Automated Shade Screen Project: 12 Steps. AdWords We use AdWords to deploy digital advertising on sites supported by AdWords. Ads are based on both AdWords data and behavioral data that we collect while you’re on our sites. The data we collect may include pages you’ve visited, trials you’ve initiated, videos you’ve played, purchases you’ve made, and your IP address or device ID. This information may be combined with data that AdWords has collected from you. We use the data that we provide to AdWords to better customize your digital advertising experience and present you with more relevant ads.

LiveRamp. Have a Cordless Tool Battery Won't Recharge? You Can Fix That.The Art of Doing Stuff. Lithium ion batteries are a wondrous invention that are lightweight and long lasting. But it’s infuriating when the battery won’t recharge. You stick the battery in the charger and … nothing. Guess what? You can fix these batteries that appear to be completely dead. Submarine Cable Map. Choosing the Resistor to Use With LEDs: 3 Steps. HOW TO: Send Audio/Your Voice Over a Beam of Light: 6 Steps. (16) GreatScott! - Resources for amateur scientists :) Building the Simplest Possible pH Meter. Build a digital pH meter that you can use instead of an expensive industrial ph meter or benchtop ph meter for a fraction of the cost. Man Of High Fidelity : Ashok : Free Download, Borrow, and Streaming. Assembling A Low Cost EMI Troubleshooting Kit – Part 1 (Radiated Emissions)

Charles' Labs - Electromagnetic interference mapping. Electromagnetics, Volume 1. KA7OEI Optical (lightbeam) through-the-air communications page. Misc. News items/Chronology: RF Coaxial Connectors. Building your own pulse to tone converter. Common wire-to-board, wire-to-wire connectors, and crimp tools. As someone who builds a lot of electrical things, one of the perhaps most unexciting yet fundamental subject areas is connectors. Calculators - Amateur-radio-wiki. DIY Professional 18650 Battery Pack: 12 Steps.

RS-232 Laser Transceiver. Published in Electronics Australia Oct. 1997 pp.56-61 Laser based projects used to be expensive, until the development of solid state lasers. This project is designed for the entry level laser experimenter. Index. Microphone Pinouts. Amazon. Recycled Laptop screen as a second PC monitor. All in one arcade controller. China PCB Prototype & Fabrication Manufacturer - PCB Prototype the Easy Way. Monitoring Home Power Consumption for less than $25. Seismometers for Schools and Others on a Budget! A Simple DIY Underwater Connector System. Up to this point, the Cave Pearls have been self-contained units. But this means that the sensors must be mounted directly on the housings, and the batteries must fit inside.

Using the Sure Electronics GPS evaluation board for NTP. Lightning detector – CameraShutter - Arduino Project Hub. Ht charger. 150+ Electronics Projects for Engineering Students. Freq Show: Raspberry Pi RTL-SDR Scanner. RSGB Amateur Radio Techniques - 7th Edition - Pat Hawker (G3VA) by undefined. Arduino Programming by undefined. Arduino workshop a hands on introduction with 65 projects by undefined.

Make electronics by undefined. FreePCB: freeware PCB layout software. T50-1. Seeed Studio Bazaar, Boost ideas, Extend the Reach - Seeed. Liquid Tight Strain Reliefs. Prototyping. Laser Activated GSM Call Alert Security Circuit for Home - Electronic Circuit Projects. Wireless Cellphone Charger Circuit - Electronic Circuit Projects. How to Build a Cheap Wi-Fi Controlled Water Valve. Manual Pick & Place Station. Low Cost Water Flow Sensor and Ambient Display using arduino -Use Arduino for Projects. Hack N Mod - Amazingly Cool Hacks, Mods, and DIY Projects.

DIY Portable, Solar Powered Wi-Fi Repeater. Power Quality Meter using Arduino -Use Arduino for Projects. Adafruit MintyBoost USB Charger Kit v3.0. The Electronic Components and Semiconductor Superstore. Lifehacker. A Homemade Variable Tuning Capacitor for tuning in your FM stations... Birmingham, Alabama Crystal Radio Group - B-Ham Radios – The Progressive Crystal Set. Get loopy with the DIY $10 Ableton Footcontroller (no soldering required) Electronics DIY - Quality Electronic Kits, Electronic Projects, Electronic Schematics, FM Transmitters, TV Transmitters, Stereo Transmitters. DIY 2k(2560x1440) LED beam projector. Hacking A Fluke Multimeter To Serve Readings Over WiFi.

The H.P. Friedrichs (AC7ZL) Homepage. Snaptekk Catalog Jan2016a. Mendocino Motor. Reflow Oven Controller Shield (Arduino Compatible) Build a Twilight Photometer to Detect Stratospheric Particles. Build a Beautiful Seismometer to Detect Quakes and Explosions. Forrest M. Mims III. Circuit Specialists Blog. HOW TO BUILD YOUR VERY OWN 8×8 LED MATRIX. How to Set up Multiple Monitors – Add Monitors to Your Computer. NASA: Tour of the Electromagnetic Spectrum. A good introductory series of 8 videos (total 30min) discussing each type of wave length. (If you start…