The Real SWR Page - Explained by WC7I - Will high SWR burn up my radio?
High loss coax can really reduce your output power. A coax with a 3 dB loss will suck up half the power, allowing the antenna to radiate the other half. End of part 1.
Solution-VS1063 - MP3 / OGG / AAC / WMA / FLAC / G.711 / G.722 Audio Codec Circuit
VS1063 is the newest VLSI Solution's MP3 slave processor family. As a first in VLSI's over decade long history of creating innovative audio IC products, VS1063 is as much aimed at encoding as it is at decoding audio. The VS1063 IC can encode an unforeseen multitude of audio formats, from MP3 and Ogg Vorbis to G.711 u-law, G.711 A-law, G.722 and 16-bit PCM. The proprietary MP3 encoder and Ogg Vorbis encoder have been carefully tuned for highest possible audio fidelity for high-quality audio streaming or recording. VS1063 can play back MP2, MP3, WMA, OGG, LC-AAC, HE-AAC, FLAC, IMA, G.711 u-law, G.711 a-law, G.722 and WAV PCM formats, making it very suitable for hi-fi audio playback and streaming applications. VS1063 also offers a full-duplex codec mode with optional Acoustic Echo Cancellation.
Making PCBs
How to make really really good homemade PCBs Note - this article is original material. There is currently a plagiarised copy of it on the site of an Indian electronics magazine credited to a rip-off artist called Indrani Bose. This page is a guide to producing consistently high quality PCBs quickly and efficiently, particularly for professional prototyping of production boards. Unlike most other PCB homebrew guides, emphasis is placed on quality, speed and repeatability rather than minimum materials cost, although the time saved by getting good PCBs every time usually saves money in the long run - even for the hobbyist, the cost of ruined PCB laminates can soon mount up!
subatomic
Monday 04.03.2006 6pm came home today to find the 9090 PCBs from Trevor came through my mail slot. 2 PCBs and 4 ICs. 9090 boards from trevor arrived
The Fabulous Logic Analyzer #1
What is a logic analyzer? A logic analyzer is a device which can monitor the high and low states of several input lines of a digital logic. It is useful for debugging digital circuits such as bus transfers, etc. You can imagine a logic analyzer to be something like a digital oscilloscope.
Memorial to G3YCC - QRP SITE
The QRP world heard of the passing of Frank G3YCC - who most know of from the masses of information he put at our disposal through his website. Frank put a lot of time & effort into this and it would be a great pity if that work was lost. Permission to reproduce his site has been granted by Frank's wife who is pleased that he can be remembered in this way by the hobby he loved. The maintainer of the site, K3HRN, believes it should be a living work in progress as a tribute to Frank, and will make corrections and additions as occassion warrants. Please report any broken links, missing files, etc to K3HRN.
Open Source Kits
Welcome to the Daisy mp3 project page! Here you will find everything you need to make the Daisy mp3 player. All the source files, hex files, EAGLE cad files, and documents are here. This is the official Make: mp3 player available here or at the Make: store. www.makezine.com
1-wire lamp control
Status: Fully working This is a project which connect a Maxim/Dallas Semiconductor microlan to a computer. The goal is to let the computer check if there's daylight in the apartment, and if there isn't some bulbs will be turned on. Schematics: PC Interface - DS2480B Relay circuit - 1 channel, DS2405 Relay circuit - 2 channels, DS2406 Testcircuit (which also measure light) - DS2450 Measure temperature - DS1820 Led-controller - DS2405 with Mos-Fet Pressure sensor MPXA4115
subatomic worklog
x0xb0x worklog Tues 10.25.2005 6:30pm I happened to be home sick today. Tracking info at the fedex website said the x0x was "on the truck" at 6:30am.
simplelogicanalyser - uvasux
Simple Logic Analyser The idea is to build a circuit and computer software that will turn my computer into a logic analyser. I'd like to be able to inspect logic values within a digital circuit. This circuit is unbelievably easy: it only uses one IC and needs no external power supply. The logic analyser (schematic) is basically a buffer between the user's circuit and the parallel port using a 74hc4050 hex non-inverting buffer.
Electronics Demonstrations
BasicsA/C CircuitsPassive FiltersOther Passive CircuitsDiodesOp-AmpsMOSFETsTransistors (Bipolar)Combinational LogicSequential Logic555 Timer ChipTransmission LinesMemristorsTunnel DiodesSpark Gaps
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
Do I really need a transistor to drive my solid state relay? - Hardware
mdesmarais, on Feb 20 2010, 07:14 AM, said: morglum, on Feb 20 2010, 01:36 AM, said: Just to make sure, just replacing the LED with my relay and the 330 ohm resistor with a 1000 ohm resistor doesnt sound like a really bad idea, correct?Also, quick newbie question if you don't mind. What's a good way to connect my DS2413?
