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Assignment I

[Register no. 1-14 1. Elaborate the working of Precision diodes with necessary diagrams. 2. A startup is designing a portable medical device that requires a stable 5V DC power supply to ensure consistent operation. However, the device is powered by a 9V battery. The design team is considering using a three-terminal fixed voltage regulator (7805) to step down the voltage. Draw and explain the circuit diagram for implementing 7805 in the given scenario.] [Register no. 15-28 1. Elaborate the working of Half wave rectifier with necessary diagrams. 2. An electronic lab is developing a variable power supply unit (PSU) that should provide an adjustable output voltage between 1.2V and 25V. The design team plans to use the LM317 adjustable voltage regulator for this purpose. Design and explain a circuit diagram to provide an output voltage range of 1.2V to 12V using LM317.] [Register no. 29-42 1. Elaborate the working of Full wave rectifier with necessary diagrams. 2. A team of engineers is designing an LED flasher circuit using a 555 Timer IC in astable mode. The LED should blink at a frequency of 2 Hz, making it suitable for warning signals. Suggest a real-world application where astable multivibrators are used apart from LED flashing.] [Register no. 43 – 49 and laterals 501 to 510 1. Elaborate the working of Peak value detector with necessary diagrams. 2. A security company is designing a motion detector alarm that activates for 5 seconds when motion is detected. The designer plans to use a 555 Timer IC in monostable mode for the delay mechanism. Explain the working principle of a 555 Timer in monostable mode with a circuit diagram for the motion detector alarm.]