Order a Pcb

Custom Printed Circuit Boards (PCBs)

In this course, you will be creating and ordering a PCB to use in your project. The primary method for ordering PCBs is to order them through PCBWay. With the help of your TA, you can order a simple, 2-layer, 100mm x 100mm PCB through PCBWay at no cost to you. This PCB will simply be fabricated, as opposed to assembled, so a major portion of this class will be soldering and assembling the PCB you order. This means that you will need to source your components either through the course or other means. See the getting parts page for more details.

Alternatively, you can order a PCB from any outside vendor (including PCBWay) and pay for the cost of the board out of pocket. By paying for a PCB yourself, you are not required to meet the deadlines imposed by the course and can sometimes get your board more quickly.

In rare cases, some teams will be allowed to order PCBs through the Electronics Services Shop in ECEB. If you have need of special board layouts or require a PCB very early in the semester, please discuss this option with your TA as early as possible.

PCBway Orders Through the Course

Orders through PCBway can be submitted and paid for by the ECE department with the help of your TA. Orders will be uploaded to PCBway by your TA and paid for on the dates listed on the course calendar. Please note that the PCBway orders will not be manufactured or shipped until they are paid for so please be aware of the lag time between order submission and payment. In addition, your order must pass PCBway's audit before the payment date for your order to be processed. In order to help students pass audit more quickly, we have provided a DRC file that can be imported in to EagleCAD to verify that your board meets PCBway's capabilities. Passing the DRC does not guarantee that your board will pass audit but it does greatly increase the probability of that event.

Electronic Services Shop

Orders placed through the Electronic Services Shop will require TA approval so please discuss with your TA before contacting the Services Shop. The software most commonly used is EagleCAD. Contact a technician in the Electronic Services Shop with questions.

Please be aware of the PCB deadlines posted on the course calendar. If you are unable to meet these deadlines, you will not be able to order a PCB through the the Electronic Services Shop. You will still be able to order PCBs through third party vendors, just be aware that rushed orders can become expensive.

Commercial quality boards

The most commonly used programs for board layout are Eagle and Orcad Layout. The two software packages below allow a schematic to be drawn and translated into a board layout.

Once the board has been laid out, some companies will manufacture small quantities for a very reasonable price.

Resonant Cavity Field Profiler

Salaj Ganesh, Max Goin, Furkan Yazici

Resonant Cavity Field Profiler

Featured Project

# Team Members:

- Max Goin (jgoin2)

- Furkan Yazici (fyazici2)

- Salaj Ganesh (salajg2)

# Problem

We are interested in completing the project proposal submitted by Starfire for designing a device to tune Resonant Cavity Particle Accelerators. We are working with Tom Houlahan, the engineer responsible for the project, and have met with him to discuss the project already.

Resonant Cavity Particle Accelerators require fine control and characterization of their electric field to function correctly. This can be accomplished by pulling a metal bead through the cavities displacing empty volume occupied by the field, resulting in measurable changes to its operation. This is typically done manually, which is very time-consuming (can take up to 2 days).

# Solution

We intend on massively speeding up this process by designing an apparatus to automate the process using a microcontroller and stepper motor driver. This device will move the bead through all 4 cavities of the accelerator while simultaneously making measurements to estimate the current field conditions in response to the bead. This will help technicians properly tune the cavities to obtain optimum performance.

# Solution Components

## MCU:

STM32Fxxx (depending on availability)

Supplies drive signals to a stepper motor to step the metal bead through the 4 quadrants of the RF cavity. Controls a front panel to indicate the current state of the system. Communicates to an external computer to allow the user to set operating conditions and to log position and field intensity data for further analysis.

An MCU with a decent onboard ADC and DAC would be preferred to keep design complexity minimum. Otherwise, high MIPS performance isn’t critical.

## Frequency-Lock Circuitry:

Maintains a drive frequency that is equal to the resonant frequency. A series of op-amps will filter and form a control loop from output signals from the RF front end before sampling by the ADCs. 2 Op-Amps will be required for this task with no specific performance requirements.

## AC/DC Conversion & Regulation:

Takes an AC voltage(120V, 60Hz) from the wall and supplies a stable DC voltage to power MCU and motor driver. Ripple output must meet minimum specifications as stated in the selected MCU datasheet.

## Stepper Drive:

IC to control a stepper motor. There are many options available, for example, a Trinamic TMC2100. Any stepper driver with a decent resolution will work just fine. The stepper motor will not experience large loading, so the part choice can be very flexible.

## ADC/DAC:

Samples feedback signals from the RF front end and outputs the digital signal to MCU. This component may also be built into the MCU.

## Front Panel Indicator:

Displays the system's current state, most likely a couple of LEDs indicating progress/completion of tuning.

## USB Interface:

Establishes communication between the MCU and computer. This component may also be built into the MCU.

## Software:

Logs the data gathered by the MCU for future use over the USB connection. The position of the metal ball and phase shift will be recorded for analysis.

## Test Bed:

We will have a small (~ 1 foot) proof of concept accelerator for the purposes of testing. It will be supplied by Starfire with the required hardware for testing. This can be left in the lab for us to use as needed. The final demonstration will be with a full-size accelerator.

# Criterion For Success:

- Demonstrate successful field characterization within the resonant cavities on a full-sized accelerator.

- Data will be logged on a PC for later use.

- Characterization completion will be faster than current methods.

- The device would not need any input from an operator until completion.

Project Videos