Boxi II – Manual
4.4
Trim 1 and Trim 2
GND
A1
A2
VCC
-
PTT
1
+
7
8
9
10
11
12
1
2
3
4
5
6
V
REF
+
+
+
+
-
-
-
-
PTT
2
IN
1
IN
2
TRIM
2
TRIM
1
MO
TOR
INPUT
RADIO
Figure 6:
Connection example for controlling external relay.
of connecting DC-motor (trim actuator), figure 7b illustrates an example of
connecting two light bulbs.
M
-
PTT
1
+
7
8
9
10
11
12
1
2
3
4
5
6
V
REF
+
+
+
+
-
-
-
-
PTT
2
IN
1
IN
2
TRIM
2
TRIM
1
MO
TOR
INPUT
RADIO
(a)
Bidirectional DC motor.
GND
-
PTT
1
+
7
8
9
10
11
12
1
2
3
4
5
6
V
REF
+
+
+
+
-
-
-
-
PTT
2
IN
1
IN
2
TRIM
2
TRIM
1
MO
TOR
INPUT
RADIO
(b)
Two independent loads.
Figure 7:
Connection examples for motor output.
The Output stage will output VCC to the selected output pin according to
Boxi configuration. If function Trim X+ is selected then the output Trim X+
will go high and Trim X- will remain low. If function trim X- voltage is selected
output Trim X- will go high and Trim X+ will remain low. This enables user
to use Boxi output for controlling DC motor or it can be used as a two channel
independent driver.
4.4.1
High current motor
Sometimes the power output of Boxi is not adequate to handle big DC motors.
In this case we propose solution with two external relays.
Figure 8 illustrates how to connect one SPST and one DPDT relays (double
pole, double throw) to drive high current DC motor in both directions. This
15
©
Kanardia
2006-2021
Summary of Contents for Boxi II
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