HEATKEYS

Tests your audio equipment, speakers, room acoustics and hearing. Audio signals and test tones playable online. High resolution sound test files available for free download.

DialABC.com home page

MediaCollege.com is a free resource site, suitable for anyone with an interest in audio-visual media. Tutorials and articles include everything from video production to website design.

Digital Signal Processing Software

wiseGEEK: clear answers for common questions

8255, PPI, parallel, digital, digital interface card, interface card, DIO, I/O, robot, robotics, computer, control, motor, motor control, parallel port, infrared, emitter, detector

The Repeater Builders Technical Information Page - a library of hands-on reference material for the repeater builder, be he (or she) amateur radio, commercial radio, LMR, public safety, CAP, GMRS, or ???

PIC Hardware projects, embedded cpu and web-enabled applications.

JetCityOrange, the West Seattle Lighthouse (47.590107,-122.385872). Space Needle webcam, editation, Buddhism, photography, DIY mods and hacks, barcode & Buddhist tattoos, sound files, free ringtones, free wallpaper images, and more. Jerry Whiting

ComTekk Software - Tone generator for 2-way radio signaling. Use sound card to generate CTCSS, DTMF, tone remote, ANI and more.

YouTube is a place to discover, watch, upload and share videos.

Radio Paging Controllers and Radios.