http://code.activestate.com/recipes/tags/rf/new/2013-02-09T10:21:39-08:00ActiveState Code Recipes2013-02-09T10:21:39-08:00Barry Walkerhttp://code.activestate.com/recipes/users/4177147/http://code.activestate.com/recipes/578451-demo-kids-level-python-rf-attenuator/

<p style="color: grey"> Python recipe 578451 by <a href="/recipes/users/4177147/">Barry Walker</a> (<a href="/recipes/tags/apple/">apple</a>, <a href="/recipes/tags/attenuator/">attenuator</a>, <a href="/recipes/tags/audio/">audio</a>, <a href="/recipes/tags/demo/">demo</a>, <a href="/recipes/tags/linux/">linux</a>, <a href="/recipes/tags/macbook_pro/">macbook_pro</a>, <a href="/recipes/tags/rf/">rf</a>, <a href="/recipes/tags/sound/">sound</a>, <a href="/recipes/tags/windows/">windows</a>). </p> <p>This code is a DEMO RF Attenuator for SW listeners.</p> <p>(The code is to show how to generate the same waveform in each channel but in antiphase, as bridge output. The RF Attenuator is just a byproduct...)</p> <p>The circuit has an insertion loss of about 10dB at full gain but that doesn't matter as it IS an attenuator after all.</p> <p>It is another learning tool for kids to build and code for themselves.</p> <p>The only common user I/O on desktops, netbooks, laptops and current MacBooks is/are the Audio Mic and Ear sockets...</p> <p>This goes for "mobiles" too...</p> <p>The circuit inside the code is so easy a 10 year old could have a working unit inisde 2 hours to experiment with...</p> <p>PyAudio IS needed for this to work and although originally designed around a MacBook Pro 13 inch OSX 10.7.5 and Python 2.6.7 has shown itself to be near platform independent...</p> <p>Read the code for much more information...</p> <p>Enjoy finding simple solutions to often very difficult problems... ;o)</p> <p>Bazza, G0LCU...</p>