4 image::telemini-v3.jpg[width="5.5in"]
6 TeleMini v3 is 0.5 inches by 1.67 inches. It was
7 designed to fit inside an 18mm air-frame tube, but using it in
8 a tube that small in diameter may require some creativity in
9 mounting and wiring to succeed! Since there is no
10 accelerometer, TeleMini can be mounted in any convenient
11 orientation. The default ¼ wave UHF wire antenna attached to
12 the center of one end of the board is about 7 inches long. Screw
13 terminals for the power switch are located in the
14 middle of the board. Screw terminals for the e-matches for
15 apogee and main ejection charges depart from the other end of
16 the board, meaning an ideal “simple” avionics bay for TeleMini
17 should have at least 9 inches of interior length.
19 === TeleMini v3 Screw Terminals
21 TeleMini v3 has four screw terminals on the end of the
22 board opposite the telemetry antenna. Two are for the apogee
23 and two are for main igniter circuits. Another two
24 screw terminals are located in the middle of the board
25 for the power switch. Using the
26 picture above and starting from the top for the pyro terminals
27 and from the left for the power switch terminals, the
28 connections are as follows:
30 .TeleMini v3 Screw Terminals
31 [options="header",grid="all",cols="2,3,10"]
33 |Terminal #|Terminal Name|Description
37 |Apogee pyro channel connection to pyro circuit
41 |Apogee pyro channel common connection to battery +
45 |Main pyro channel connection to pyro circuit
49 |Main pyro channel common connection to battery +
53 |Switch connection to flight computer
57 |Switch connection to positive battery terminal
60 === Using a Separate Pyro Battery with TeleMini v3
62 As described above, using an external pyro battery involves
63 connecting the negative battery terminal to the flight
64 computer ground, connecting the positive battery terminal to
65 one of the igniter leads and connecting the other igniter
66 lead to the per-channel pyro circuit connection. Because
67 there is no solid ground connection to use on TeleMini, this
70 The only available ground connection on TeleMini v3 are
71 the two mounting holes next to the telemetry
72 antenna. Somehow connect a small piece of wire to one of
73 those holes and hook it to the negative pyro battery terminal.
75 Connecting the positive battery terminal to the pyro
76 charges must be done separate from TeleMini v3, by soldering
77 them together or using some other connector.
79 The other lead from each pyro charge is then inserted into
80 the appropriate per-pyro channel screw terminal (terminal 3 for the
81 Main charge, terminal 1 for the Apogee charge).
83 === Using an Active Switch with TeleMini v3
85 As explained above, an external active switch requires three
86 connections, one to the positive battery terminal, one to
87 the flight computer positive input and one to ground. Again,
88 because TeleMini doesn't have any good ground connection,
89 this is not recommended.
91 The positive battery terminal is available on the Right
92 power switch wire, the positive flight computer input is on
93 the left power switch wire. Hook a lead to either of the
94 mounting holes for a ground connection.
98 TeleMini v1 is the earlier version of this product. It
99 has a lower-power radio, less storage, no beeper and
100 soldered-in wires instead of screw terminals for the
104 image::telemini-v1-top.jpg[width="5.5in"]