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5.4
Speaker / Microphone (Labelled 1*V 7C(LT))
The speaker / microphone is connected to analog terminal 1* and digital input 7.
A signal waveform can be captured from the microphone by the program (Prog4.dxc)
BEGIN"Mic_1"
RA;BURST(100,10000,LEVEL,50,5S)
1*VNC(LEVEL>10,GL50MV,FF5)
END
Tap the microphone sharply with your finger or a pencil.
An analog frequency and digital frequency from the microphone can also be read by the program.
(Prog5.dxc)
BEGIN”Mic_2”
RA100T
1*F
7C(LT)
END
Tap the microphone sharply with your finger or a pencil.
The resistance of the speaker coil (nominally 8 Ohm) can be read by the program. (Prog6.dxc)
BEGIN”Mic_3”
RA500T
1*R
END
This repeatedly outputs an excitation current into the speaker coil, which will also drive the device as a
speaker producing a soft beep when each reading is taken.
5.5
Light Sensor (Labelled 5V)
The light sensor is a silicon photodiode which outputs a voltage and current proportional to the
ambient light intensity. The light intensity can be read by the program. (Prog7.dxc)
BEGIN”Light”
RA1S
5V
5I
END
Shade the sensor, or shine brighter light onto it, to change the readings.
5.6
Ruler (Labelled 6BGI)
The ruler along the front edge of the SSP configured as a resistance bridge, in which 2 halves of the
ruler are two active arms of the bridge.
Connect a flying lead wire to the + terminal of analog channel 6, and touch the other end onto the
white markings along the ruler while running the program. (Prog8.dxc)
BEGIN”Ruler”
RA1S
6BGI
END
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