Eowave Eobody2 USB8 SensorBox - Manual (Page 20)

USB 8 sensor interface / Making my own sensors
eo•body supports many kind of sensors. Most common sensors are switches and potentiometers,
but there are many other kinds of sensors.
Making my own sensor switch
Making my own sensor potentiometer
Making my own sensor with other kinds of sensors
IV. Making my own sensors
(to avoid antenna effect
when the switch is off)
3-5 Kohm
ground
+ 5V Signal
Switch
+ 5V ground
Signal
Potentiometer
Sensors need a minimum of two cables:
ground and signal. When 5 V is connected
to the signal - when using switches for ex-
ample - it may create an antenna effect gen-
erating undesirabled distorsion. This is the
reason why the signal must be connected to
the ground.
To use a standard potentiometer with eo•body, connect both
outputs of the potentiometer resistor to the ground and 5 V.
Connect the variable output of the potentiometer to the signal
input.
Sensor
+ 5V or + 9V
Signal ground
ground
Coming from Eobody2 or external power supply (any other
voltage has to come from an external power supply).
Some sensors like distance sensors need an extra power
supply. Eobody2 delivers +5V and +9V to power these
sensors up to 250 mA. When the total consumption from
all the sensors plugged to Eobody2 is higher than 250 mA,
an additional external power supply is necessary.