Project

# Title Team Members TA Documents Sponsor
44 Electronic Sound Generator
Jeremy Hutnak
Kedong Shao
Parikshit Kapadia
Kexin Hui design_review
proposal
Teammates: Kedong Shao (kshao5)
Jeremy Hutnak (hutnak2)
Parikshit Kapadia (pkapadi2)
We discussed it and we decided that we would like to build a relatively inexpensive, they can range from $200 to $4000, analog synthesizer that is simple to use for those that would like to make interesting effects with their music. Analog synthesizers can become very large and complex in how to work with them to create the sounds wanted. We would like to create one that would be more intuitive on how to use it as well by using a simple manual switch and dial control scheme.
We would need to build a power supply for the system, which we are thinking of using battery power to allow it to be easily transported and used, but we may have to build a power convert to use the standard wall power. We would need to design and build two oscillator circuits one voltage controlled oscillator and a low frequency oscillator. We will need one low pass filter circuit and a envelope generator circuit to modulate and filter the signal. We will need to build two amplifier circuits, one voltage controlled amplifier to boost the signals amplitude and another for the audio output. For the audio output we would also need to allow for an external amplifier,typical amplifier used for musical instruments, to be plugged in and bypass the built in output. We will also need to design and build a white noise generator to produce the white noise sound used to make sounds like wind.
The bulk of the work on the project will be designing, building, and interconnecting the circuits all together. We will also have to layout a PCB design and make some kind of container to hold the analog synthesizer.
Some challenges we will face are figuring out how to map voltages to different notes as well as making sure the circuits will all work together properly. Some of the group also has no experience working with music or analog signal processing, so we will have to work together to research and understand how each circuit will work and how they will effect each other to produce different effects.

RFI Detector

Jamie Brunskill, Tyler Shaw, Kyle Stevens

RFI Detector

Featured Project

Problem Statement:

Radio frequency interference from cell phones disrupts measurements at the radio observatory in Arecibo, Puerto Rico. Many visitors do not comply when asked to turn their phones off or put them in airplane mode.

Description:

We are planning to design a handheld device that will be able to detect radio frequency interference from cell phones from approximately one meter away. This will allow someone to determine if a phone has been turned off or is in airplane mode.

The device will feature an RF front end consisting of antennas, filters, and matching networks. Multiple receiver chains may be used for different bands if necessary. They will feed into a detection circuit that will determine if the power within a given band is above a certain threshold. This information will be sent to a microcontroller that will provide visual/audible user feedback.

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