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diff --git a/doc/easymega.inc b/doc/easymega.inc new file mode 100644 index 00000000..c126004b --- /dev/null +++ b/doc/easymega.inc @@ -0,0 +1,123 @@ +== EasyMega + + .EasyMega Board + image::easymega-v1.0-top.jpg[width="4.5in"] + + EasyMega is a 1¼ inch by 2¼ inch circuit board. It was + designed to easily fit in a 38mm coupler. Like TeleMetrum, + EasyMega has an accelerometer and so it must be mounted so that + the board is aligned with the flight axis. It can be mounted + either antenna up or down. + + === EasyMega Screw Terminals + + EasyMega has two sets of nine screw terminals on the end of + the board opposite the telemetry antenna. They are as follows: + + .EasyMega Screw Terminals + [options="header",grid="all",cols="2,3,10"] + |==== + |Terminal #|Terminal Name|Description + + |Top 1 + |Switch Input + |Switch connection to positive battery terminal + + |Top 2 + |Switch Output + |Switch connection to flight computer + + |Top 3 + |GND + |Ground connection for use with external active switch + + |Top 4 + |Main - + |Main pyro channel connection to pyro circuit + + |Top 5 + |Main + + |Main pyro channel common connection to battery + + + |Top 6 + |Apogee - + |Apogee pyro channel connection to pyro circuit + + |Top 7 + |Apogee + + |Apogee pyro channel common connection to battery + + + |Top 8 + |D - + |D pyro channel connection to pyro circuit + + |Top 9 + |D + + |D pyro channel common connection to battery + + + |Bottom 1 + |GND + |Ground connection for negative pyro battery terminal + + |Bottom 2 + |Pyro + |Positive pyro battery terminal + + |Bottom 3 + |Lipo + |Power switch output. Use to connect main battery to pyro battery input + + |Bottom 4 + |A - + |A pyro channel connection to pyro circuit + + |Bottom 5 + |A + + |A pyro channel common connection to battery + + + |Bottom 6 + |B - + |B pyro channel connection to pyro circuit + + |Bottom 7 + |B + + |B pyro channel common connection to battery + + + |Bottom 8 + |C - + |C pyro channel connection to pyro circuit + + |Bottom 9 + |C + + |C pyro channel common connection to battery + + |==== + + === Using a Separate Pyro Battery with EasyMega + + EasyMega provides explicit support for an external pyro + battery. All that is required is to remove the jumper + between the lipo terminal (Bottom 3) and the pyro terminal + (Bottom 2). Then hook the negative pyro battery terminal to ground + (Bottom 1) and the positive pyro battery to the pyro battery + input (Bottom 2). You can then use the existing pyro screw + terminals to hook up all of the pyro charges. + + === Using Only One Battery With EasyMega + + Because EasyMega has built-in support for a separate pyro + battery, if you want to fly with just one battery running + both the computer and firing the charges, you need to + connect the flight computer battery to the pyro + circuit. EasyMega has two screw terminals for this—hook a + wire from the Lipo terminal (Bottom 3) to the Pyro terminal + (Bottom 2). + + === Using an Active Switch with EasyMega + + As explained above, an external active switch requires three + connections, one to the positive battery terminal, one to + the flight computer positive input and one to ground. + + The positive battery terminal is available on Top terminal + 1, the positive flight computer input is on Top terminal + 2. Ground is on Top terminal 3. |