1. Now CoolJunk brings you WORLD OF ICs WHY IC 2. Reduces Size FIRST Easy to Implement SECOND Jack Kilbys First IC at Texas Instruments 3. From Sand to a Chip PHOTOLITHOGRAPHY 4. Dual Inline Packaging 5. Surface Mount 6. Dual Inline Packaging Pins spaced at 1/10th of an inch Rows spaced at 3/10th of an inch Pins between 4-16 Plastic Body 7. Reading First Line SN74HCO4N Make Family Generation IC no. Package Type 8. TRY TO READ IT 9. 1. Always read first line 2. Ignore second line 3. Identify notch- Pin1 4. Read Anticlockwise RULES4 10. 555 Timer IC. Please open your kit and take it out 11. - 8 Pins, DIP - Each pin has a different function - Voltage range is 4.5-15V - To power it, pin 8 is given Vcc and pin 1 is grounded - Pin 2 is Input - Pin 3 is Output - 200mA of current from output pin 555 Specifications 12. Draw Pin Diagram in your notebook 13. Let us create Time Time, t = 0.0011 * R78 * C6 Identify R78 and C6 in your circuit sheet, experiment-1 Calculate t 14. Experiment 1 15. Connecting 555 on BreadBoard 16. Experiment 1 Rotate 4K7 potentiometer to the maximum value. Take Voltage reading at Pin 2 (Red probe at pin 2 and black probe to ve terminal of battery). It shall be close to 9V. Press S1 (continuously) and rotate 5K. Check the voltage reading at pin 2 until it reaches between 3- 4 volts. Rotate the potentiometer further and see if your voltage reading at pin 2 is less than 3V 17. Experiment 1 If you press S1, LED will glow for a fixed time, t. After LED glows, press S1. Nothing will happen. Measure the total time for which LED glows. While LED is glowing, press S2 (pin 4). Immediately, LED will be off. This is a Reset Button 18. If you press S1, LED will glow for a fixed time, t. After LED glows, press S1. Nothing will happen. Measure the total time for which LED glows. While LED is glowing, press S2 (pin 4). Immediately, LED will be off. This is a Reset Button Replace R78 with a 1M ohm preset. At different positions of the preset, you will notice different timing durations (measure time with watch). 19. Pin 3 receives high when Pin 2 is low Voltage at Pin 2 should be less than 1/3rd of Vcc Pin 3 produces positive pulse (voltage) for time T 20. INSIDE MONOSTABLE MODE 21. Applications of Monostable One shot Trigger 22. Let us create Tone F, frequency = 1440/(R78+2R67)*C6 Identify R78, R67 and C6 in your circuit sheet, experiment-2 Calculate f Then, implement the following circuit diagram 23. Experiment 2 24. EQUAL ON/OFF CYCLES 25. Circuit Modifications Activity 2.1: Replace R67 with a 100K preset. Rotate it and see what happens?---------DIFFERENT TONES Activity 2.2: Connect two LEDs at pin 3. One LED with its positive leg at pin 3 and the other leg grounded through a 330 ohm resistor. Second LED with its negative leg at pin 3 and the other leg connected to Vcc through a 330 ohm resistor Activity 2.3: Replace C6 in the circuit with 10 mfd or 100 mfd or 1000 mfd and see the difference. 26. Circuit Modifications (Home Assignment) Activity 2.4: You can also control the volume of the tone by using Pin 5. Replace capacitor (0.1 mfd) with the following circuit: 27. Let us create Bistable You create an indefinite pulse Then, implement the following circuit diagram When you press S2, LED glows. If you press S2 again, nothing will happen. Press S4, LED is off. Press S4 again, nothing happens. Press S1 and LED glows again. 28. Experiment 3 29. Combining two ICs Output of Pin 3 is used to power pin 8 of another IC (3 1). Vmin = 60-70% of Vcc Output of Pin 3 is used to control pin 5 of another IC (3 5). When 3 is high, pitch increases. When 3 is low, pitch decreases. Output of Pin 3 is used to trigger another IC (3 2). When pin 3 is low, it can trigger another 555 since its output is close to 0.5V. 30. 1 Monostable combined with 1 Astable 31. One Astable combined with another Astable 32. 74HC00 Please open your kit and take it out 33. 20 MN Gates in Pentium IV FAST COMPUTATION THINKING MACHINES 34. Digital IC Types Made from Complimentary Metal Oxide transistors, 74 Series Consumer less power More sensitive to static charge Part Number contains alphabet C Voltage Range: 3-18 V Made from Bipolar Junction transistors (Transistor- Transistor Logic) 4000 Series Consume more power More Sensitive to static charge Part Number contains alphabet S, LS, ALS CMOS TTL 35. 1. Give regulated 5V DC Supply using a Voltage Regulator-7805 2. Low input (0) means (< 1V) 3. High input(1) means (> 3.5 V) RULE1 36. Dont mix TTL and CMOS Chips in the same circuit No input pin of a digital IC should be left floating or unattended # If it is a CMOS IC, ground the unused input pins # If it is a TTL IC, give Vcc to the unused input pins RULE2 37. Latch-Output is made fixed 38. Let us now build Electronic Door Lock 39. LOGIC OF ELECTRONIC DOOR LOCK 40. Let us now build Quiz Game 41. Circuit Requirements 1. Press button first- Winner 2. Output signal latched 3. Output signal is one of the feedback 4. All buttons blocked 5. Host resets the system 42. - All player buttons should be blocked once the output signal latches from the winning team - So, at least one players output is enough to block all the buttons. Thus, all outputs can be combined into a OR Gate. 43. Two 555 timers in bistable as Latch SPDT Switch for play and reset In play mode, user switches receive ve In reset mode, reset pins of 2 timers receive ve Push button switches as trigger (One side ve and other side OR Gate ) 44. Output of push buttons into 2 OR Gates Winning user presses push button first--- Negative at Pin 2 of 555---LED glows Output of both timers into a 3rd OR Gate Output of 3rd gate as one of the inputs to 2 OR gates 45. When host starts the system, either of the two LED glows. And none of the teams actually pressed the button. SWITCH BOUNCING 46. UNWANTED OSCILLATIONS MULITPLE PULSES TO 555 TIMER 555 TRIGGERS NOT JUST ONCE BUT A NUMBER OF TIMES How to remove these oscillations? 47. De-bounce Switch using NOR 48. Draw this pin diagram 49. 74LS92 Counter IC, TTL family 14 pin IC, Two inputs (pin 1 and pin 14) Four Output pins-12,11,9,8 To power it, give Vcc to pin 5 and ground to pin 10 To use it as digital counter, give input to pin 14 and connect pin 1 to pin 12 50. Binary Counter First Run a 555 in astable mode At Four Output pins-12,11,9,8::: Connect a (LED + R) and ground Resistors See pin diagram and do other connections of 74LS92 Connect output (pin 3) of 555 to input A (pin 14) of 74LS92 Record the observations in the following table See your Circuit Sheets 51. LED D LED C LED B LED A Binary Code Number Glows Glows Doesnt Glow Doesnt Glow 1100 12 Say, if Binary Number = 011 Then, Decimal Number = 2^0 * 1 + 2^1*1 + 2^2 * 0 = 1*1 + 2*1 + 0 = 1+2 = 3 52. CD 4017 Decade Counter (counts 0-9) Output Pins- 1-7, 9-11 Pin8- Ground, Pin 16-Vcc 15, Reset Pin- Low for normal operation Pin 14- Input Pin (Clock Input) Pin 13- Low to enable display, high to freeze display Pin12- Divide by 12 Output- Provides high for counts 0-4 and low for 5-9 53. DRAW THIS 54. 7- Segment Display