Bastl Sense User Manual

Sense can convert and amplify a s ignal from almost
any type of analog sensor into control voltage and gate
signals. You can use sensors with variable resistance (light
dependent resistors, body contacts, water contacts etc.) or
sensors that already output voltage (pulse sensor, accele-
rometer, inductors, piezo etc.) amplify them and calibrate
them in the way to have suitable control voltage and gate
output signals.
connecting the sensor
)
Select whether the signal is voltage (V) or resistance (Ω)
based and use an appropriate input for the signal.
)
If you are using very low amplitude voltage (V) signal (such
as an inductor to pick up an electromagnetic field), put
the pre-amp switch into the upper position to increase the
input gain by 50. Note: The pre-amp stage is AC coupled
and inverting so if you want non-inverted signal output use
the "- CV OUT" output.
)
If you are using any a dedicated (Arduino based) analog
sensor, you can use the mini pin-header patchbay to plug
your sensor to the required driving voltage and connect its
output to the (V) IN voltage input pin on the patch bay.
See the instructions of the specific sensor for more details.
The (V) IN of the patch bay is normalised to the (V) IN
mono-jack connector.
)
If you are using a resistance based sensor hooked up to
a mono-jack cable, this input is simply the two poles of the
resistance based sensor.
)
Select a pullup resistance similar to the resistance of your
sensor. The closer the sensor resistance to the pullup
resistor, the easier it is to calibrate and gain a useful signal.
Just try different settings which work best for you.

controls and outputs

)
The Gain knob adjusts how much gain is applied
to the input.
)
The Clipping LEDs show you whether the signal
is amplified too much and the signal is clipping.
)
The AC / DC switch selects whether the input is AC or DC
coupled. To simplify it: use AC if you are picking up signals
at audio rate. Use DC coupling for slower signals.
)
The Offset knob sets the voltage offset applied to the
signal. When the AC / DC switch is in the DC position the
offset is added before the gain stage. If the AC/DC switch
is in the AC position the offset is added after the gain
stage (see calibration).
)
The CV OUTs output the amplified and offseted signal.
"CV OUT +" is the non-inverted and "CV OUT -" is the
inverted version of the signal.
) )
The Threshold knob sets a voltage threshold for
a comparator that outputs gate signals.
) )
The Threshold LEDs indicate a Gate signal. They are also
very useful for calibration.
) )
"Gate OUT +" outputs a gate when the positive signal
is above the threshold set by the threshold knob. "Gate
OUT -" outputs a gate when the positive signal is below
the threshold.
fatures
� voltage and resistance inputs
� pin header patchbay for connecting Arduino
compatible sensors (5V or 3V)
� resistance range switch
� pre-amp for voltage sensors
� gain knob with clipping indicator
� voltage offset (positive or negative)
� AC or DC coupling for gain stage
� threshold for gate outputs
� CV output and inverted CV output
� GATE output and inverted GATE output

technical details

� 5HP
� PTC fuse and diode protected 10 pin power connector
� 50mm deep
� current +12: <35mA, -12: <25 mA (can be affected
by the actual current draw of the sensor used)
SENSE
n log sensor c libr tion
) ) )
+
CLIP CLIP
AC
GAIN
) 0
DC )
+
OFFSET
Ω
V
0
+
GATE THRESHOLD
)
V Ω
)
)
) G
V 5 3
N V V
IN
D
)
V IN Ω IN
+
CV OUT
+
GATE OUT