FINAL mô phỏng [Autosaved] (2).pptxxxxxx

simulation circult

1. SIMULATION OF DIGITAL CIRCUITS Instructor : PhD . Phạm Ngọc Thành PhD . Phạm Thị Việt Hương PROJECT NAME RESEARCH & DESIGN OF ANTI-THEFT CIRCUIT USING LASER SENSOR Lê Đức Anh 21070172 GROUP 3 Nguyễn Quang Huy 21070400 Đỗ Tùng Bách 21070172

2. PROBLEM

3. Overview 01.Why Should You Choose Our Products? 02. Electricity Supply Block 04 . Signal Processing Block and Warning Bell 03. Signal Receiving Block

4. Why Should You Choose Our Products?

5. Why Should You Choose Our Products?

6. Electricity Supply Block 1. Introducing IC7805 2. How Does The Electricity Supply Block Work?

7. Electricity Supply Block 1. Introducing IC7805 IC 7805 is a voltage regulator. It provides a constant +5V output voltage to a variable input voltage source. Pin Name Description Input (V+) Input voltage is not controlled Ground ( Gnd ) Connect to ground Output (Vo) +5V regulated output

8. Electricity Supply Block 1. Introducing IC7805 Specifications Output voltage 5v Input voltage 7V – 18V DC Output current 1A Operating temperature - Maximum working power 5W Output voltage 5v Input voltage 7V – 18V DC Output current 1A Operating temperature Maximum working power 5W Application Reduce the voltage Electricity supply Battery charger Solar power supply

9. Electricity Supply Block We have a power supply from 9-12v Use a switch (SW) to turn the input power on and off Diode used to protect the circuit from damage caused by reverse voltage Capacitors C2 and C4 that filter out frequency noise by blocking AC current and allowing DC current to pass through The current passes through the IC 7805 to regulate the voltage and provide a constant 5v output voltage to the power supply Use the LED to indicate power when receiving a signal

10. Signal Receiving Block 1. Introducing Transistor C1815 3. How Does The Signal Receiving Block Work? 2. Introducing Photoresistor

11. Signal Receiving Block The C1815 transistor   is a type of semiconductor electronic component of the NPN transistor type, which is commonly used for general as well as private applications as a high-frequency OSC and audio frequency amplifier 1. Introducing Transistor C1815 Specifications Maximum voltage : 50 v Maximum current : 150mA Amplification factor ~ 25-100  Operating temperature should be: -55 to +150 C.  Output Signal : Analog

12. Signal Receiving Block   C urrent amplification factor : Amplification Operation Mode: When there is a small current to the base terminal ( > 0) The current depends on the current and (current gain factor) of the transistor. The voltage between the collector and the emitter ( ) decreases as the current increases.   Operating principle:

13. Signal Receiving Block (sat) = - . ( sat ) = 0.7 + ( ( sat ) / )   Saturation operation mode: When there is no current to the base terminal ( =0), the transistor is in a disconnected state. The voltage between the collector and the emitter ( ) is equal to the supply.   Operating principle:

14. Signal Receiving Block Reverse saturation operation regime: When the current into the base pole is large enough ( >> 0), the transistor is in a reverse saturated state.. The current does not depend on the current anymore, but only on the voltage and the load resistor. The voltage between the collector and the emitter ( ) is equal to the (sat) saturated voltage of the transistor.   ( sat ) = - ( sat ) . ( sat ) = . ln ( ( sat ) / + 1)   Operating principle:

15. Signal Receiving Block 2. Introducing Photoresistor Photoresistors are also known by other names such as photocells. This is a component made of a special substance that has the ability to change the resistance when light enters it.  Specifications Maximum Voltage (V–dc): 150 Power ( mW ): 100mW Ambient temperature: – 30°C -> +70°C Peak Spectrum (nm): 560 Impedance in light (10Lux): 5-10K Ω Response Time: 30ms

16. Signal Receiving Block Structure Lower part : These are metal films that are linked together through the terminals. Upper part : The component with the maximum contact with the two metal films. The component will be placed in a plastic box to improve light exposure while capturing changes in light intensity.

17. Signal Receiving Block Principle of operation When there is light shining on the semiconductor, free electrons appear, increasing electrical conductivity, reducing the resistance of the semiconductor (if it is connected to an electrical circuit, the circuit will be short-circuited, short-circuited) When there is no light, the interimpedance of the semiconductor gradually increases to infinity (if it is connected to the circuit, the circuit will be exposed)

18. Signal Receiving Block

19. Signal Processing Block and Warning Bell 2. How Does The Signal Processing Block and Warning Bell Work? 1. Introducing IC555

20. Signal Processing Block and Warning Bell 1. Introducing IC555 Features • Timing From Microseconds to Hours • Astable or Monostable Operation • Adjustable Duty Cycle • TTL-Compatible Output Can Sink or Source Up to 200 mA The 555 IC, also known as a timer IC or generator, is a multi-function integrated circuit (IC) widely used in electronic applications. It can generate signal pulses, timers and oscillators with high precision

21. Signal Processing Block and Warning Bell Pin 1 (Ground): Connects to the 0v rail Pin 2 (Trigger ): U sed to activate the IC’s timing cycle. Detects 1/3 of rail voltage to make output HIGH. Pin 2 has control over pin 6 Pin 3 (Output ): The pin outputs a logic signal. Level 0 and level 1 are determined by the signal state. Pin 4 (Reset): The reset pin is used to reset.   Pin 5 (Control Voltage): A voltage applied to this pin will vary the timing of the RC network Pin 6 (Threshold): Detects 2/3 of rail voltage to make output LOW only if pin 2 is HIGH Pin 7 (Discharge): U sed to “discharge” the timing capacitor to ground when the output at pin 3 switches “LOW”. Pin 8 (+ Vcc supply ): Power up IC 555 with voltage from 2 - 18V.

22. Signal Processing Block and Warning Bell Operating modes of IC555 Astable mode In astable mode, the IC puts out a continuous stream of rectangular pulses having a specified frequency. The 555 Circuit for astable mode is given in fig. Formules to calculate timing:  

23. Signal Processing Block and Warning Bell Operating modes of IC555 Monostable mode Formular: T   In this mode, the IC generates only single pulse when the timer obtains a signal from the trigger's input button, The period of the pulse depends upon the resistor and capacitor values

24. Signal Processing Block and Warning Bell Operating modes of IC555 Bistable Mode In this mode, the IC generates two stable sates: High and low. The output signals of these two states are forbidden by a trigger and reset input pins, not by the charging & discharging of the capacitors

25. Signal Processing Block and Warning Bell Specifications Output current 6-15mA Input voltage 2 V – 18V High output logic voltage (logic 1) 0.5V-15V Low output logic voltage is low (logic 0) 0.03-0.06V Maximum working power 600m W