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Diodes for Digital Logical Design
- 2. Diode • A semiconductor device with two terminals, typically allowing the flow of current in one direction only. • Blocks the current that flows in the opposite direction
- 4. Zener Diode • flow in the forward direction as normal • but will also allow it to flow in the reverse direction
- 6. IR LED • An IR LED, also known as IR transmitter, is a special purpose LED that transmits infrared rays in the range of 760 nm wavelength. • Used in Remotes control.
- 7. Photodiode • A photodiode is a transducer that takes light energy and converts it into electrical energy.
- 8. Transistor i. Switch ii. Supply small amount of electricity to control gates on much large supply of electricity. iii.Composed of 3 parts • Base • Collector • Emitter
- 10. MP3 Tone
Editor's Notes
- Anode and cathode are the terminals
- Anode and cathode are the terminals The characteristics of a diode closely match to a switch. An ideal switch when open does not conduct current in either directions and in closed state conducts in both directions.
- It allow current to flow in the forward direction as normal, but will also allow it to flow in the reverse direction when the voltage is above a certain value - the breakdown voltage known as the Zener voltage. The Zener diode specially made to have a reverse voltage breakdown at a specific voltage.
- A light-emitting diode (LED) is a semiconductor device that emits visible light when an electric current passes through it.
- IR stands for Infrared the human eye cannot see the infrared radiations, it is not possible for a person to identify whether the IR LED is working or not
- If photodiode placed in a dark room it creates no electricity. However, if light falls upon it, and produces electric current in response. Transducer a device that converts variations in a physical quantity, such as brightness, into an electrical signal.
- The design of a transistor allows it to function as a switch. This is using a small amount of electricity to control a gate on a much larger supply of electricity. Transistors are composed of three parts – a base, a collector, and an emitter. The base is the gate controller device for the larger electrical supply. The collector is the larger electrical supply, and the emitter is the outlet for that supply. By sending varying levels of current from the base, the amount of current flowing through the gate from the collector may be regulated. In this way, a very small amount of current may be used to control a large amount of current, as in an amplifier. The same process is used to create the binary code for the digital processors but in this case a voltage five volts is needed to open the collector gate. In this way, the transistor is being used as a switch with a binary function: five volts – ON, less than five volts – OFF. This circuit arrange by my self.