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Table of Contents
Sensor module
(Version 5)
Sensor module includes the combined board of sensors, low-pass filter and external sensors.
Sensor module features
- Electret microphone
- Light intensity sensor (photoresistor) VT935G (resistance 18,5 kΩ on 10 lux) datasheet
- Temperature sensor (thermistor NTC) (resistance 10 kΩ on 25 °C) datasheet
- Potentiometer 10 kΩ
- Ultrasonic distance measure sensor Devantech SRF05 with cable (measuring distance 1-400 cm) datasheet
- Infrared distance sensor Sharp GP2Y0A21YK0F (measuring distance 10-80 cm) datasheet
Electrical connections
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Controller module and Sensors module connection
Sensors
Every sensor on the board is connected through the multiplexer, enabling to select between on-board sensor or external sensor which can be connected to the same port through the connectors. By default all on-board sensors are connected to the analogous inputs of the microcontroller (ADC0-ADC3).
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Schematics of sensors connections
Low-pass filter
Low-pass filter can be composed between external analogous inputs 0-3 (PF0-PF3). Resistor and capacitor will be connected to the socket for building up the low-pass filter. By default a low-pass filter is composed for the channel 0 (PF0). Resistor value is 10 kΩ and capacitor value is 100 nF.
Schematics of low-pass filter
