Lab

Recommended Tools

In addition to the resources that the course provides, students may find it useful to obtain the tools below:

  • wire cutter
  • wire stripper
  • needle nose pliers
  • screwdrivers
  • hex set (ball ends)
  • electrical tape
  • small scissors
  • a small file

Lab Resources

The Senior Design Lab is located at ZJUI room D225. This lab provides you access to various equipment, some spare parts, computers, and a space to work on your senior design project. In addition, course staff will make themselves available in this lab during their office hours to provide guidance on your project throughout the semester. Your weekly meetings with your TA will also likely be at this location.

It is our intention that this laboratory space provides you and your team with all the tools you would need to develop and test your project (within reason, of course!). If there is something that you require in the lab to complete your project that does not exist in the lab, talk to your TA and we will see how we can solve your issue.

Lab Rules

There are two overarching rules of working in the Senior Design Lab (and, frankly, any shared lab). First, be safe, and second, be courteous. Lab privileges will be revoked if you fail to complete the required laboratory safety training or if you break any of the lab rules. Specific points and examples of what we expect:

Breaking the rules or exhibiting bad laboratory etiquette will lead to a loss of points and/or revocation of laboratory access.

Lab Bench Reservations

We do not expect the lab to become so crowded such that finding a lab bench to work at becomes difficult. However, in the case that this does happen (particularly in semesters with very high enrollment), we will move to a Lab Bench Reservation system. Reserving a bench guarantees that spot for you, however each team may only book one lab bench at a time, and for a maximum of 4 hours per day.

If the lab needs to move to a reservation-based system, you will be notified ahead of time.

A few ground rules:

  1. You may use a lab bench (a) during a time for which you have it reserved or (b) any time during which it is not reserved in the system (on a first-come-first-served basis). However, if you are working at a bench that is unreserved and somebody reserves it using the online system, the group with the reservation gets the lab bench.
  2. There is a limit on the amount of time for which you can reserve benches in ZJUI D225. The limit is currently a total of 4 hours of total bench time in the lab per group per day (e.g., 2 hours at Bench A and 2 hours at Bench B would max out your team's reservations for the day). While this may seem restrictive, keep in mind that the course serves more than 30 groups in a typical semester and the lab has only 14 benches. Also keep in mind that you can work at a bench if it is unreserved.
  3. Some lab benches have specialized equipment at them, such as digital logic analyzers. Try to reserve the lab bench that has the equipment that you need.
  4. Cancel reservations that you will not need as soon as possible to give other groups a chance to reserve the lab bench. You can cancel a reservation up to 1 hour before time and not have it count against your daily allotment.
  5. Conflicts and/or reports of people not following these rules should be sent to your TA with the course faculty in copy.
  6. Above all, be courteous. Especially near the end of the semester, the lab will be more crowded and many teams are stressed. Clean up the lab bench when you are done with it. Start and end your sessions on time. Be patient and friendly to your peers and try to resolve conflicts professionally. If we notice empty lab benches that have been reserved, we will cancel your reservations and limit your ability to reserve lab benches in the future. Similarly, do not reserve more time than you will need. If we notice that you are frequently canceling reservations, we will limit your ability to reserve lab benches in the future. Finally, do not try to exploit the system and reserve a bench for 30 minutes every hour for eight hours. We will notice this and revoke your ability to reserve a bench.

Clickers for ZJUI Undergraduate

Bowen Li, Yue Qiu, Mu Xie, Qishen Zhou

Featured Project

# TEAM MEMBERS

Bowen Li (bowenli5)

Qishen Zhou (qishenz2)

Yue Qiu (yueq4)

Mu Xie (muxie2)

# PROBLEM

I-clicker is a useful teaching assistant tool used in undergraduate school to satisfy the requirement of course digitization and efficiency. Nowadays, most of the i-clickers used on campus have the following problems: inconsistency, high response delay, poor signal, manual matching. We are committed to making an i-clicker for our ZJUI Campus, which is economical, using 2.4G Wi-Fi signal connection, and on the computer to achieve matching. At the same time, it has to deal with the drawbacks as mentioned above.

# SOLUTION OVERVIEW

Compared with wired machines and mobile phone software, wireless i-clickers have the following advantages: they are easy to carry, they can accurately match and identify user tags, they are difficult to cheat and would not distract students. A wireless voting system consists of a wireless i-clicker, a wireless receiver on the administrator side, and a corresponding software program. In order to solve the problem of signal reception which is common in schools, we decided to use 2.4GHz Wi-Fi signal for data transmission. In addition, different from other wireless voting devices that carry out identity confirmation and bind identity information on the hardware side, we decided to make an identity binding system on the software side, and at the same time return it in the hardware unit for customer confirmation.

# SOLUTION COMPONENTS

A mature i-clicker should have a hardware part and a software part. The hardware part needs economical and effective hardware logic design. These include the storage and transportation of user key signals through a single chip computer program, a simple LCD1602 display to provide immediate feedback, a 2.4GHz Wi-Fi transmit-receive device for many-to-one wireless signal transmission, and a beautiful shell design. While the software component includes the conversion of hardware signals to software signals, a mature voting system, authentication of device owners, and signal return to hardware systems.

## SCM HARDWARE LOGIC SYSTEM:

Use SCM to compile the LCD module, return user input value. STC89C52RC can easily do this. Pass data to the NRF wireless transmission module.

## WIRELESS 2.4G SIGNAL TRANSMISSION SYSTEM:

A wireless signal detector should be a many-to-one signal transmission system. Bluetooth is one-to-one and Radio frequency is expensive. So, Wi-Fi signal transmission is the best choice. Each detector should load a transmitter and a receiver to transmit data to the administrator and get the data transmitted by the software.

## HARDWARE-TO-SOFTWARE SIGNAL TRANSFER SYSTEM:

A Hard-to-Soft system is necessary in any similar design. We should write a driver to process data.

## SOFTWARE DATA PROCESSING SYSTEM:

Software ought to process the data signal accurately and generate feedback to each i-clicker. Specifically, a software is needed in our design. The administrator can get user data and display it visually through statistical charts. This system should also have the function to associate user information to their answer. This is designed to score. A return signal should also be designed here. Users can receive feedback on their detector screen.

## USER IDENTIFICATION SYSTEM ON SOFTWARE:

Give an internal ID number to each i-clicker. Bind identity information (such as NetID, Student number) to i-clicker internal ID number on the software. Users can get their binding information on their screen by pushing a specific button. This data will be reset when a new packet is returned by the administrator.

## 3D PRINT SHELL:

A beautiful shell that fits the hardware system is needed. The shell should not be too large and the buttons must fit into the hardware.

# CRITERION FOR SUCCESS

Stability: Signal should be received easily. Signal loss inside a room shouldn’t occur, especially when there is a gap of two chairs.

Affordability: I-clickers should have a low cost. This facilitates mass production and popularization on campus.

Efficiency: The process from keystroke to signal collection and transmission shouldn’t have a high delay.

Beauty: Shell design should be accepted widely and be accessible to 3D printing.

Feedback: Users should get the feedback from the administrator easily. This is useful in arousing study enthusiasm of students.

Concurrency: The system should handle signals from a great deal of students in a short period correctly.

# DISTRIBUTION OF WORK

Qishen Zhou: Software data processing system and user information identification system.

Bowen Li: Hardware-to-software data transfer system and SCM hardware logic system.

Yue Qiu: Wireless signal transmission system and processing the data returned from the administrator.

Mu Xie: 3D print shell design and physical setup for the hardware part.