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##### ECET 105 Week 2 Homework Assignment # 2
1. What is the duty cycle for a square wave signal that is HIGH for 15 sec and LOW for 30 sec?
2. A pulse train is shown on the oscilloscope below. Determine the period of the pulse.
3. Determine the frequency of a pulse that occurs every 10 ms.
4. What is the base-10 value for the binary number 11012?
5. What are the respective weights of the 1s in Problem 4?
6. How many different values can …. represented by 6 bits, 7 bits, 8 bits, and 10 bits?
7. What is the minimum number of bits required to represent each of the following decimals?
8. Convert the binary value, 1011010100101101, to a hexadecimal equivalent.

Convert the following decimal numbers to 8-bit binary values. For negative numbers, use the 2’ complement formulation.

Express each of the following signed numbers (2s complement format) in decimal:

##### ECET-105 Week 2 Lab: Soldering Techniques and the Electronic Die Kit

Objectives:

1. To learn the basics of soldering.
2. ….. produce mechanically and electrically sound solder joints.
3. To assemble the Electronic Dice Kit.

Results: ► Conclusions: ► Observations/Measurements: Describe any problems you had with assembling the analog meter kit. ► Questions:

• What is the purpose of a core in hollow solder wire?
• What is tinning and why is it important?
• Why is safety so important when soldering?
• Why has lead-free solder replaced lead-based solder? Be sure to properly cite any sources of information.
• Run 25 trials of your completed kit and record the results below.

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