/elec/audio-switcher

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  • Committer: Tim Marston
  • Date: 2012-11-22 18:27:56 UTC
  • Revision ID: tim@ed.am-20121122182756-htn5j0b912tyx4w2
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SET UP
 
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======
 
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              |
 
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              |   
 
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             o-------------.
 
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              |        ____|____
 
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  at90usb162  |       |         |
 
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              |       |  Relay  |
 
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              |       |_________|
 
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              |            |
 
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              |            |
 
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                           |
 
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                      -----+-------- GND
 
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No resistor is required to limit the current flow through the at90usb162 pin,
 
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which can only take a maximum of 40mA.  The reason for this is that the relay
 
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coil its self has the correct resistance, at 5V, to pull less than 40mA.  So
 
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you can just power it directly from a pin.
 
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REFERENCES
 
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==========
 
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Help with programming AVR chips (without the Arduino libraries):
 
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         http://jamie.lentin.co.uk/embedded/minimus/