Projects/RelayBoard/RelayBoard.txt

   1 /** \file
   2  *
   3  *  This file contains special DoxyGen information for the generation of the main page and other special
   4  *  documentation pages. It is not a project source file.
   5  */
   6
   7 /** \mainpage OB's Quad-Relay outlet control using a Teensy2++
   8  *
   9  *  \section Sec_Compat Project Compatibility:
  10  *
  11  *  The following list indicates what microcontrollers are compatible with this project.
  12  *
  13  *  \li AT90USB1286
  14  *
  15  *  \section Sec_Info USB Information:
  16  *
  17  *  The following table gives a rundown of the USB utilization of this project.
  18  *
  19  * <table>
  20  *  <tr>
  21  *   <td><b>USB Mode:</b></td>
  22  *   <td>Device</td>
  23  *  </tr>
  24  *  <tr>
  25  *   <td><b>USB Class:</b></td>
  26  *   <td>None</td>
  27  *  </tr>
  28  *  <tr>
  29  *   <td><b>USB Subclass:</b></td>
  30  *   <td>None</td>
  31  *  </tr>
  32  *  <tr>
  33  *   <td><b>Relevant Standards:</b></td>
  34  *   <td>USB Standards</td>
  35  *  </tr>
  36  *  <tr>
  37  *   <td><b>Supported USB Speeds:</b></td>
  38  *   <td>Low Speed Mode, Full Speed Mode</td>
  39  *  </tr>
  40  * </table>
  41  *
  42  *  \section Sec_Description Project Description:
  43  *
  44  *  Firmware for a Teensy2++ AVR-based miniboard to control four relays, using the
  45  *  same protocol used by the commercially available Silver Shield PM power outlets
  46  *  ( http://sourceforge.net/projects/sispmctl ) sold for some time. Because this
  47  *  project mimics the original device, it can be controlled using the "sismpctl"
  48  *  package included in many Linux distributions - including router-orientated
  49  *  versions such as OpenWRT - to control the board's relays.
  50  *
  51  *  Relays 1 to 4 are respectively wired to pins C4, C5, C6 and C7 of the Teensy++ V2,
  52  *  which are the PORTC bits 4 to 7 of the AT90USB1286. The relays MUST be wired through
  53  *  a transistor, and a diode must be added in antiparallel on the relay's coil pins to
  54  *  protect the transistor from back EMF generated from the relay when the coil is turned off.
  55  *  The transistor base pin is wired to the Teensy data port through a 10K resistor. A
  56  *  LED may be also be added as a relay status indicator on each channel.
  57  *
  58  *  The Relay coil will be driven by the transistor, but the power will come from
  59  *  the 5V from the PC's USB port: Be careful in choosing the relay to avoid overloading
  60  *  the PC, as the maximum current used MUST remains under ~450mA @ 5V.
  61  *
  62  *  The author's tested relays are 2 Finder 32.21.7.005.2000, coil il 125ohm, which can
  63  *  handle 5A @ 250VAC. Be careful to use proper isolation if high voltages are manipulated.
  64  *  The author used Hotglue to isolate all parts of the PCB in contact with high voltage.
  65  *
  66  *  See <a>http://www.pjrc.com/teensy/</a> for the Teensy2++ website.
  67  *
  68  *  <table>
  69  *   <tr>
  70  *    <td><b>Signal:</b></td>
  71  *    <td><b>AVR Port:</b></td>
  72  *   </tr>
  73  *   <tr>
  74  *    <td>Relay 1</td>
  75  *    <td>PORTC, Pin 4</td>
  76  *   </tr>
  77  *   <tr>
  78  *    <td>Relay 2</td>
  79  *    <td>PORTC, Pin 5</td>
  80  *   </tr>
  81  *   <tr>
  82  *    <td>Relay 3</td>
  83  *    <td>PORTC, Pin 6</td>
  84  *   </tr>
  85  *   <tr>
  86  *    <td>Relay 4</td>
  87  *    <td>PORTC, Pin 7</td>
  88  *   </tr>
  89  *   <tr>
  90  *    <td>Teensy2++ Yellow Led</td>
  91  *    <td>PORTD, pin 6</td>
  92  *   </tr>
  93  *  </table>
  94  *
  95  */