The switch type in this simple circuit is a Single Pole, Double Throw (SPDT). This determines the colour emitted (green or red). The only thing that really matters is that the LEDs Anode is connected to the positive (power) and the LEDs Cathode is connected to the negative (ground). The circuit diagrams shows how the switch determines, which of the anodes is connect to ‘positive’. The ‘common’ is connected to the negative.īoth anodes of the tricolour LED (shown below) are connected to the circuit. Tricolour LEDs can also have four leads (three anodes - blue, green and red). NOTE: If a positive current is supplied to both the green and red anodes, a third colour is emitted, often regarded as amber. The cathode is the electrode, where substances are gaining electrons and are reduced. ![]() With the second circuit, the toggle switch is pushed to the right, current flows through the green anode and the LED emits green light. The anode is the electrode, where substances are losing electrons and are oxidated. In a common anode RGB LED, the three LEDs share a positive connection. With the first circuit, when the toggle switch is pushed to the left, the current flows through the red anode and the LED emits red light. LEDs are electrically polarised and will only operate correctly when their positive terminal (also known as the anode) is connected to the supply positive. In a common cathode RGB LED, all three LEDs share a negative connection (cathode). Two circuits are shown in pictorial form below. The LED will either emit green or red light, depending on which anode is connected to positive / which one has current flowing through it. ![]() A single cathode is connected to the negative. PDF FILE - CLICK HERE FOR PRINTABLE WORKSHEETĬLICK HERE FOR POWERPOINT VERSION OF WORKSHEETĪ typical tricolour LED (shown below) has two anodes, that can be connected to the positive side a circuit. This means that an LED will pass current in its forward direction but block the flow of current in the reverse direction.
0 Comments
Leave a Reply. |
AuthorWrite something about yourself. No need to be fancy, just an overview. ArchivesCategories |