3 image::telemega-v1.0-top.jpg[width="5.5in"]
5 TeleMega is a 1¼ inch by 3¼ inch circuit board. It was
6 designed to easily fit in a 38mm coupler. Like TeleMetrum,
7 TeleMega has an accelerometer and so it must be mounted so that
8 the board is aligned with the flight axis. It can be mounted
9 either antenna up or down.
11 === TeleMega Screw Terminals
13 TeleMega has two sets of nine screw terminals on the end of
14 the board opposite the telemetry antenna. They are as follows:
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18 |Terminal #|Terminal Name|Description
22 |Switch connection to positive battery terminal
26 |Switch connection to flight computer
30 |Ground connection for use with external active switch
34 |Main pyro channel connection to pyro circuit
38 |Main pyro channel common connection to battery +
42 |Apogee pyro channel connection to pyro circuit
46 |Apogee pyro channel common connection to battery +
50 |D pyro channel connection to pyro circuit
54 |D pyro channel common connection to battery +
58 |Ground connection for negative pyro battery terminal
62 |Positive pyro battery terminal
66 |Power switch output. Use to connect main battery to pyro battery input
70 |A pyro channel connection to pyro circuit
74 |A pyro channel common connection to battery +
78 |B pyro channel connection to pyro circuit
82 |B pyro channel common connection to battery +
86 |C pyro channel connection to pyro circuit
90 |C pyro channel common connection to battery +
93 === Using a Separate Pyro Battery with TeleMega
95 TeleMega provides explicit support for an external pyro
96 battery. All that is required is to remove the jumper
97 between the lipo terminal (Bottom 3) and the pyro terminal
98 (Bottom 2). Then hook the negative pyro battery terminal to ground
99 (Bottom 1) and the positive pyro battery to the pyro battery
100 input (Bottom 2). You can then use the existing pyro screw
101 terminals to hook up all of the pyro charges.
103 === Using Only One Battery With TeleMega
105 Because TeleMega has built-in support for a separate pyro
106 battery, if you want to fly with just one battery running
107 both the computer and firing the charges, you need to
108 connect the flight computer battery to the pyro
109 circuit. TeleMega has two screw terminals for this—hook a
110 wire from the Lipo terminal (Bottom 3) to the Pyro terminal
113 === Using an Active Switch with TeleMega
115 As explained above, an external active switch requires three
116 connections, one to the positive battery terminal, one to
117 the flight computer positive input and one to ground.
119 The positive battery terminal is available on Top terminal
120 1, the positive flight computer input is on Top terminal
121 2. Ground is on Top terminal 3.