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== EasyMini
image::easymini-top.jpg[width="5.5in"]
EasyMini is built on a 0.8 inch by 1½ inch circuit board. It's
designed to fit in a 24mm coupler tube. The connectors and
screw terminals match TeleMini v2.0, so you can easily swap between
EasyMini and TeleMini.
=== EasyMini Screw Terminals
EasyMini has two sets of four screw terminals on the end of the
board opposite the telemetry antenna. Using the picture
above, the top four have connections for the main pyro
circuit and an external battery and the bottom four have
connections for the apogee pyro circuit and the power
switch. Counting from the left, the connections are as follows:
[options="header",grid="all",cols="2,3,10"]
|====
|Terminal #|Terminal Name|Description
|Top 1
|Main -
|Main pyro channel connection to pyro circuit
|Top 2
|Main +
|Main pyro channel common connection to battery +
|Top 3
|Battery +
|Positive external battery terminal
|Top 4
|Battery -
|Negative external battery terminal
|Bottom 1
|Apogee -
|Apogee pyro channel connection to pyro circuit
|Bottom 2
|Apogee +
|Apogee pyro channel common connection to battery +
|Bottom 3
|Switch Output
|Switch connection to flight computer
|Bottom 4
|Switch Input
|Switch connection to positive battery terminal
|====
=== Using a Separate Pyro Battery with EasyMini
As described above, using an external pyro battery involves
connecting the negative battery terminal to the flight
computer ground, connecting the positive battery terminal to
one of the igniter leads and connecting the other igniter
lead to the per-channel pyro circuit connection.
To connect the negative pyro battery terminal to TeleMini
ground, connect it to the negative external battery
connection, top terminal 4.
Connecting the positive battery terminal to the pyro
charges must be done separate from EasyMini, by soldering
them together or using some other connector.
The other lead from each pyro charge is then inserted into
the appropriate per-pyro channel screw terminal (top
terminal 1 for the Main charge, bottom terminal 1 for the
Apogee charge).
=== Using an Active Switch with EasyMini
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. Use
the negative external battery connection, top terminal 4 for
ground.
The positive battery terminal is available on bottom
terminal 4, the positive flight computer input is on the
bottom terminal 3.
|
