Project

# Title Team Members TA Documents Sponsor
20 Touch Controlled Programmable DC Power Supply Circuit
 Chaoli Xia
Sichen Wang
Weisong Shi
Yiyi Wang
 design_document1.pdf
proposal2.pdf
proposal1.pdf
 Aili Wang
# MEMBERS:
- **Weisong Shi** weisong4
- **Chaoli Xia** chaolix2
- **Yiyi Wang** yiyi4
- **Sichen Wang** sichenw2

# TITLE:
**Touch Controlled Programmable DC Power Supply Circuit**

# PROBLEM:
Numerous electronic devices are powered by varying DC voltage levels. For instance, cell phones, watches, and Kindles all require a 5V voltage adapter, whereas a laptop adapter supplies the motherboard with 12V. There are a variety of models, standards, and power supply methods for electronic devices, which can make powering them both inconvenient and problematic. Accommodating these diverse standards can be challenging. So in this project, we aim to build an intuitive, touch-controlled and programmable DC power supply to avoid the limitations.

# SOLUTION OVERVIEW:
The aim of this project is to develop printed circuit board (PCB) level touch-controlled programmable DC power supply circuits that can accommodate these diverse DC voltage levels. Its configuration adjustments are initiated by touch, fusing technology. The design integrates an AC-DC converter, variable regulated power supply, touch control circuit, and short circuit protection, creating a flexible and safe power supply solution.

# SOLUTION COMPONENTS:
- **AC-DC Converter:**
This component efficiently converts AC to DC to power the circuit. It includes a step-down transformer, a bridge rectifier, a low-pass filter circuit, an LED indicator, switch and fuse to ensure efficient and reliable power conversion.
- **Variable Regulated Power Supply Circuit:**
This component provides a stable and adjustable DC output to fulfill diverse voltage requirements. It includes Variable voltage regulator from TI or ADI, and variable voltage control circuits for outputting different voltage levels.
- **Touch Control Circuit:**
This component allows touch-sensitive controls for user interaction.It includes touch sensors (touch plate), digital IC and other circuits to produce control signal for the variable voltage control circuits.
- **Short Circuit Protection Circuit:**
This component ensures the safety of the circuit and the connected devices by detecting and preventing short circuits. It includes current sensors and overcurrent protection components.

# CRITERION FOR SUCCESS:
- **Diverse Voltage Accommodation:**
The power supply circuit should be able to efficiently supply a wide range of DC voltage levels to meet diverse application requirements.
- **Touch Controlled:**
The touch-controlled system should be intuitive and responsive.
- **Short Circuit Protection:**
The circuit should effectively detect and respond to short circuits.
- **Stablity and Reliability:**
* The variable regulated power supply should deliver stable and accurately regulated DC output under varying load conditions.
* The PCB design should be reliable and efficient.

# DISTRIBUTION OF WORK:
- **Weisong Shi & Chaoli Xia (ECE):**
* Design and implement the touch control circuit.
* Develop the algorithm for short circuit detection and protection.
- **Yiyi Wang & Sichen Wang (EE):**
* Design the AC-DC converter circuit, considering efficiency and safety.
* Design the variable regulated power supply circuit, considering the stability and the voltage range.
- All the team members will contribute to the documentation, including circuit diagrams, PCB layouts, and code documentation. We will also collaborate on testing the integrated system to ensure the functionality.

Smart Frisbee

Featured Project

The idea of this project would be to improve upon the 395 project ‘Smart Frisbee’ done by a group that included James Younce. The improvements would be to create a wristband with low power / short range RF capabilities that would be able to transmit a user ID to the frisbee, allowing the frisbee to know what player is holding it. Furthermore, the PCB from the 395 course would be used as a point of reference, but significantly redesigned in order to introduce the transceiver, a high accuracy GPS module, and any other parts that could be modified to decrease power consumption. The frisbee’s current sensors are a GPS module, and an MPU 6050, which houses an accelerometer and gyroscope.

The software of the system on the frisbee would be redesigned and optimized to record various statistics as well as improve gameplay tracking features for teams and individual players. These statistics could be player specific events such as the number of throws, number of catches, longest throw, fastest throw, most goals, etc.

The new hardware would improve the frisbee’s ability to properly moderate gameplay and improve “housekeeping”, such as ensuring that an interception by the other team in the end zone would not be counted as a score. Further improvements would be seen on the software side, as the frisbee in it’s current iteration will score as long as the frisbee was thrown over the endzone, and the only way to eliminate false goals is to press a button within a 10 second window after the goal.