139 lines
3.8 KiB
PHP
139 lines
3.8 KiB
PHP
== TeleMega
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.TeleMega Board
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image::telemega-v1.0-top.jpg[width=400]
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TeleMega is a 1¼ inch by 3¼ inch circuit board. It was
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designed to easily fit in a 38mm coupler. Like TeleMetrum,
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TeleMega has an accelerometer and so it must be mounted so that
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the board is aligned with the flight axis. It can be mounted
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either antenna up or down.
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TeleMega v2.0 has a few minor changes from v1.0:
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* Companion connector matches EasyMega functions
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* Serial port connector replaced with servo connector with
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support for up to 4 PWM channels.
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* Radio switched from cc1120 to cc1200.
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None of these affect operation using the stock firmware, but
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they do mean that the device needs different firmware to
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operate correctly, so make sure you load the right firmware
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when reflashing the device.
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=== TeleMega Screw Terminals
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TeleMega has two sets of nine screw terminals on the end of
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the board opposite the telemetry antenna. They are as follows:
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.TeleMega Screw Terminals
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[options="header",grid="all",cols="2,3,10"]
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|====
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|Terminal #|Terminal Name|Description
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|Top 1
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|Switch Input
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|Switch connection to positive battery terminal
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|Top 2
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|Switch Output
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|Switch connection to flight computer
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|Top 3
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|GND
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|Ground connection for use with external active switch
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|Top 4
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|Main -
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|Main pyro channel connection to pyro circuit
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|Top 5
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|Main +++
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|Main pyro channel common connection to battery +++
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|Top 6
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|Apogee -
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|Apogee pyro channel connection to pyro circuit
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|Top 7
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|Apogee +++
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|Apogee pyro channel common connection to battery +++
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|Top 8
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|D -
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|D pyro channel connection to pyro circuit
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|Top 9
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|D +++
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|D pyro channel common connection to battery +++
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|Bottom 1
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|GND
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|Ground connection for negative pyro battery terminal
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|Bottom 2
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|Pyro
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|Positive pyro battery terminal
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|Bottom 3
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|Lipo
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|Power switch output. Use to connect main battery to pyro battery input
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|Bottom 4
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|A -
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|A pyro channel connection to pyro circuit
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|Bottom 5
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|A +++
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|A pyro channel common connection to battery +++
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|Bottom 6
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|B -
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|B pyro channel connection to pyro circuit
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|Bottom 7
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|B +++
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|B pyro channel common connection to battery +++
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|Bottom 8
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|C -
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|C pyro channel connection to pyro circuit
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|Bottom 9
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|C +++
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|C pyro channel common connection to battery +++
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|====
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=== Using a Separate Pyro Battery with TeleMega
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TeleMega provides explicit support for an external pyro
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battery. All that is required is to remove the jumper
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between the lipo terminal (Bottom 3) and the pyro terminal
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(Bottom 2). Then hook the negative pyro battery terminal to
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ground (Bottom 1) and the switched positive pyro battery to
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the pyro battery input (Bottom 2). Note that you must include
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a switch between the pyro battery and the board for safety,
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as the on-board power switch circuit only supports the primary
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battery! You can then use the existing pyro screw
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terminals to hook up all of the pyro charges.
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=== Using Only One Battery With TeleMega
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Because TeleMega has built-in support for a separate pyro
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battery, if you want to fly with just one battery running
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both the computer and firing the charges, you need to
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connect the flight computer battery to the pyro
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circuit. TeleMega has two screw terminals for this—hook a
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wire from the Lipo terminal (Bottom 3) to the Pyro terminal
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(Bottom 2).
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=== Using an Active Switch with TeleMega
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As explained above, an external active switch requires three
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connections, one to the positive battery terminal, one to
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the flight computer positive input and one to ground.
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The positive battery terminal is available on Top terminal
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1, the positive flight computer input is on Top terminal
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2. Ground is on Top terminal 3.
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