Jiri Polivka is a chief scientist at Spacek Labs Inc., Satna Barbara, Calif. He received a master of science degree in radio electronics and a PhD in microwave radiometry from the Czech Technical University (CVUT), Prague. Email address: jpolivka@spaceklabs.com Web site: http://www.spaceklabs.com
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March 30, 2006[Ideas For Design] Simple Toggle-Switch Driver Operates Coaxial RF Switches
Working on an embedded project? An 8-bit microcontroller with a pulsewidthmodulation (PWM) peripheral can provide a low-cost and easy solution to adding natural voice to your next embedded endeavor. We recently implemented this technique in SuitSat-1 (see "Latest Radio Amateur Satellite Is No Empty Suit," March 16, 2006, p. 25). Listeners could hear recordings of schoolchildren saying "greetings from space," as well as telemetry readings (time, temperature, and battery...
