Silicon Chip March 2013

The March issue of Silicon Chip Magazine, features an easy to build Infrasound Detector. The low frequency constant sound from wind turbines can cause discomfort to a number of people. This inexpensive unit filters all sound signals except those below 20Hz. The output is then dislayed on a standard frequency multimeter. Also this month, the second part of the High-Performance CLASSiC DAC, which features exceptional sound output from digital sources, such as SD cards, USB input and more. This month the circuit is explained in detail and the performance graphs for this unit are shown.

If your interested in Model Railways, 2 great projects for the model enthusiast. Build an Automatic Points Controller, this unit detects an approaching train and will automatically switch the points for the train. Ideal for when you have a large layout and only a single operator. A Capaitor Discharge Unit is also explained, this unit provides power for twin-coil points motors, which are commonly used for points in model railways. All projects come complete with circuit diagram and electronic parts list.

This month’s features look at some of the new test instrument add-ons for your iPad. Previously the preserve of games and the internet, a number of new test instruments can be connected to your iPad to provide highly accurate test intruments, with detailed graphics and storage capabilities. These new instruments include a Spectrum Analyser, Oscilloscope and Logic Analyser, all available at prices less than the standalone units.

Part Code: SILCHIPMAR2013

Features

• Oscium Test Instrument Add-On for the iPad
• New SIE-64 Hearing Aid from Blarney & Saunders
• Programmable Systems on a Chip (PSoC)

Projects

• High Performance CLASSiC DAC, Part 2
• Infrasound Detector for Low Frequency Measurements
• Automatic Points Controller for Model Railways
• Capacitor Discharge Unit for Twin-Coil Points Motor
• Control Relays via the Internet with Arduino

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