Final Thesis
Simple preamplification of the electret microphone. Can be used as sound sensor for the arduino microcontroller. Electronic components needed: electret microphone, transistor 2N3904, two capacitors 0.1 uF, two resistors 10 kohm, one resistor 100 kohm. Input voltage is 3-9 Volts.
An exercise for testing the spatial possibilities of an object which could be actuated with electroactive polymers. All main polygons are linked together with a wire in order to simulate its behavior when actuated.
2-dimensional planes plastic forming the polygons
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An electronic test circuit for electroactive polymer actuator. The aim of this circuit is to test the possibility of controlling the polymer actuator with a microcontroller (Arduino). The circuit consits of 3 blocks 1) Variable power supply – provides stable voltage 0-12V and current of 125 mA for the high voltage converter. 2) High voltage converter and polymer actuator – converter converts incoming voltage of 0-12V and transforms it to high voltage (0-6kV). High voltage is essential for actuation of polymer. Graphite cathode and anode start to actuate the polymer matter around 2 kV. Positive and negative output of the converter are directly connected to the anode and cathode of the actuator. Bleeder resistors discharge the electric charge after the circuit is off. 3) Arduino microcontroller and digital potentiometer MCP4131 – control the behaviour of the actuator. Digital potentiometer has a range of 128 values. It is possible to add sensors to this circuit.
digital potentiometer MCP4131 test circuit variable power supply test circuit
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Mechanism for prestretching the VHB films. Film is being applied to the mechanism, stretched in each direction and then fixed to the stable frame.
Preliminary sketches on topic of electroactive polymers research and their possibilities of creating interactive behaviour.
