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+== EasyMega
+
+ 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:
+
+ [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.