Technical
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LED Chaser
I don’t know why, but people like blinking lights. You see LED chasers everywhere, in TV shows (Knight Rider), movies, and store windows. This schematic is my version of a simple 10 LED chaser....
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Digital reception, but not digital radio
With Motorola’s new three- or four-chip Symphony radio, you can design a consumer radio for AM/FM bands that provides improved reception. The radio uses digital- and software-radio techniques, a...
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FM transmitter/receiver provides 433-MHz link
For applications such as handheld terminals, inventory control, and security systems, the RTFQ1 transmitter and complementary RRFQ1 receiver from OKW Electronics give you a moderate-speed, moderate-di...
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Single-chip receiver for mobiles handles TV and radio
Mirics Semiconductor’s MS1001 (diagram) is an RF tuner IC that the start-up company describes as a “poly-band” device for mobile digital broadcast reception. While several companies have recentl...
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TriQuint buys RF transistor developer Peak Devices
Oregon-based wireless communication RF modules and components supplier TriQuint Semiconductor today announced that it has entered into a definitive agreement to Peak Devices Inc. for an undisclosed ca...
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µC forms FM oscillator
A project required an inexpensive oscillator whose frequency increased step by step from 200 to 400 Hz and then decreased to 200 Hz. The first step was to design a VCO with a staircase driver. However...
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Thursday’s Deal Of The Day: iRiver AFT100 Mobile FM Transmitter
I was just perusing this morning’s Buy.com on-sale email and saw that the most excellent FM transmitter I earlier told you about is available for $19.99 with free budget shipping. While not quit...
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Silicon Labs Si473x
Integrating an antenna input and an audio output in a monolithic IC, the Si473x AM/FM-radio-receiver family requires no manual alignment. Requiring two external components in a 0.15¡Á0.15-cm board, th...
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Add a signal-strength display to an FM-receiver IC
The Philips (www.semiconductors.philips.com) TDA7000 integrates a monaural FM-radio receiver from the antenna connection to the audio output. External components include one tunable LC circuit for the...
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Silicon Laboratories Si472x
Silicon Laboratories Si472x: FM-radio transmitter combines a receiver and a transmitter into one chip Able to receive and FM signal and transmit an FM signal to an FM tuner, the Si472x FM radio transc...