4 image::easymini-top.jpg[width="5.5in"]
6 EasyMini is built on a 0.8 inch by 1½ inch circuit board. It's
7 designed to fit in a 24mm coupler tube. The connectors and
8 screw terminals match TeleMini v2.0, so you can easily swap between
11 === EasyMini Screw Terminals
13 EasyMini has two sets of four screw terminals on the end of the
14 board opposite the telemetry antenna. Using the picture
15 above, the top four have connections for the main pyro
16 circuit and an external battery and the bottom four have
17 connections for the apogee pyro circuit and the power
18 switch. Counting from the left, the connections are as follows:
20 [options="header",grid="all",cols="2,3,10"]
22 |Terminal #|Terminal Name|Description
25 |Main pyro channel connection to pyro circuit
29 |Main pyro channel common connection to battery +
33 |Positive external battery terminal
37 |Negative external battery terminal
41 |Apogee pyro channel connection to pyro circuit
45 |Apogee pyro channel common connection to battery +
49 |Switch connection to flight computer
53 |Switch connection to positive battery terminal
56 === Connecting A Battery To TeleMini v2.0
58 There are two possible battery connections on
59 EasyMini. You can use either method; both feed
60 through the power switch terminals.
62 One battery connection is the standard Altus Metrum
63 white JST plug. This mates with single-cell Lithium
64 Polymer batteries sold by Altus Metrum.
66 The other is a pair of screw terminals marked 'Battery
67 +' and 'Battery -'. Connect a battery from 4 to 12
68 volts to these terminals, being careful to match polarity.
70 === Charging Lithium Batteries
72 Because EasyMini allows for batteries other than the
73 standard Altus Metrum Lithium Polymer cells, it cannot
74 incorporate a battery charger circuit. Therefore, when
75 using a Litium Polymer cell, you'll need an external
76 charger. These are available from Altus Metrum, or
79 === Using a Separate Pyro Battery with EasyMini
81 As described above, using an external pyro battery involves
82 connecting the negative battery terminal to the flight
83 computer ground, connecting the positive battery terminal to
84 one of the igniter leads and connecting the other igniter
85 lead to the per-channel pyro circuit connection.
87 To connect the negative pyro battery terminal to TeleMini
88 ground, connect it to the negative external battery
89 connection, top terminal 4.
91 Connecting the positive battery terminal to the pyro
92 charges must be done separate from EasyMini, by soldering
93 them together or using some other connector.
95 The other lead from each pyro charge is then inserted into
96 the appropriate per-pyro channel screw terminal (top
97 terminal 1 for the Main charge, bottom terminal 1 for the
100 === Using an Active Switch with EasyMini
102 As explained above, an external active switch requires three
103 connections, one to the positive battery terminal, one to
104 the flight computer positive input and one to ground. Use
105 the negative external battery connection, top terminal 4 for
108 The positive battery terminal is available on bottom
109 terminal 4, the positive flight computer input is on the