Silicon Chip October 2013

The October issue of Silicon Chip Magazine includes a Software Defined Radio project, this unit is powered from your PC and can accurately monitor frequencies from 100kHz to 2GHz. The unit is self-contained and uses a USB DVB-T dongle for the high accuracy receiver. The unit also incorporates an Up-Converter and RF preselector. The unit provides reception in the FM, AM, SSB, CW frequency ranges and the software can provide precise setting frequencies as well as a spectrum analyser and waterfall displays directly on your PC.

Also this month build a low-cost speaker system and matching amplifier, with surprisingly good performance. Detailed construction information is given on cutting the correct sizes of wood for the enclousure as well as step-by-step instructions for putting it all together. The matching stereo amplifier is suitable for a 10W output, with very low distortion and is also short circuit protected. Finally this month, an Automatic Car Headlight Controller, this unit turns on the car’s headlights in low light conditions and will also give a warning if the lights have been left on, when the engine is stopped. All projects come complete with circuit diagram and electronic parts list.

This month’s articles include a useful article on replacing the battery pack in your cordless drill. The battery packs can easily be replaced with a new lithium polymer battery pack which offers less weight and the ability to run for a longer time. Also this month a quick look at the future in two-way radio with the arrival of digital two-way radio, offering clearer signals and an increased number of users within the same frequency.

Part Code: SILCHIPOCT2013

Features

Fit Your Cordless Drill with a Lithium Battery Pack
Narrow-Band Digital Two-Way Radio

Projects

SiDRADIO: An Integrated SDR using a DVB-T Dongle, Part 1
“Tiny Tim” Horn-Loaded Speaker System
“Tiny Tim” 10W/Channel Stereo Amplifier, Part 1
Automatic Car Headlight Controller

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