Electronics Electronic control system Electrical Signals Input and output sensors Input sensors Copy from page 231 Output sensors 5 of 46 Boardworks Ltd 2007 Uses of resistors 6 of 46 Boardworks Ltd 2007 Resistor circuit diagram symbols Diodes Diodes allow current to flow through them in one direction only. Please copy the circuits at the top of page 232 Take notes on what is meant by forward bias and reverse bias. Diodes and rectification Diodes can be used to change AC to DC. This process is called rectification, if a capacitor is used the current can be smoothed Draw the input and output voltages for a AC current that is rectified. Do question Nov 2010 Thermistors an input device Stick and fill in note sheet LDR an input device Stick and fill in note sheet Transducers Transducers are devices that convert electrical signals into some other form or vice versa 12 of 46 Boardworks Ltd 2007 Resistor circuit diagram symbols