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Adana Science and Technology University Department of Electrical and Electronics Engineering Electrical Circuit Lab Term Project LED FLASHER CIRCUIT 1. INTRODUCTION In this project, you are going to design a circuit to blink a led. This circuit consists of a first order RC circuit and an op-amp. The blink period must determined by the capacitor and the resistor values. 1.1 Design Criteria’s Design the circuit so that the led is on while the capacitor is charging, and off while the capacitor is discharging. The blink period must be adjusted with a potentiometer. Protect the led from possible over voltage. The initial blink period can be chosen arbitrary, but the effect of the potentiometer must be clearly seen in a suitable time interval. 2. Rules and Regulations During the project, you may use any types of resistors, potentiometers, capacitors, inductors, diodes, LED, battery and op-amps. Other circuit components and integrated circuits are not allowed to use during the implementation phase. The project will be carried out by one student. 2.1. Preparation In the preparation part, each group is required to present a proposed design solution for the project in a report (pre-report). The report should also include simulation results illustrating the operation of the circuit used in the design. The necessary calculations for each step (for example, resistor and capacitor values, blink period of the led) should be described in the report clearly. The deadline for submitting the pre-report will be announced. Please ask the laboratory assistant about the date. Late submissions will be penalized. 2. 2. Implementation and Demonstration In the implementation part, you will physically construct your circuit. All team members must attend the construction together. The attendency will be consider during the lab performance grade. You must provide your pots, etc.) and bread-board. own circuit components (op-amps, resistors, capacitors, NOTE: During the project you are going to submit two reports. In the pre-report you are required to give the main blocks of your design with their schematics and simulation results. The second one is the final report which contains information below. 3. Final Report The final report should include of the experiences gained during the project. the final design, results, and a summary NOTE: The objectives, results and the experiences should be presented clearly. This does not mean a long report, but definitely a well-organized one. The final report should contain the following sections: 1. Abstract and Introduction 2. Theory 2.1. Selection of equipment such as resistors, capacitors, inductors, op-amps etc. 2.2. Working principle of the project 3. Schematic diagram of the circuit 4. Simulation results 5. Description of circuit operation: Both theoretically and experimentally 6. Comments and conclusions ATTENTION Cheating is strongly forbidden and will be severely punished. Each project can be implemented in many different ways. Hence, it will be easy to detect similarities. This does not mean that you cannot collaborate with your friends. However, the allowed form of collaboration is exchanging the ideas, not duplicating the design details.