Charlie Fridman

PCB Designs

Final PCB Design:

Speaker Designs

These are my first Speaker designs. My top design is the pig. In the past I have made really complicated designs and they have never come out exactly how I wanted them to, so I decided to pick and interesting but simple design. I also chose this design as it would be easily portable which is exactly what I want for my speaker. I have also made the decision to use the B speakers because not only do they sound the best (in my opinion) but they also would look great as the pigs' nostrils.

Speaker Design Feedback:

Speaker Design (Detailed)

Mostly Finished Speaker Design

Cardboard Prototype

Breadboard Picture:

PCB Documentation:

Digital Worksheet 1:

https://docs.google.com/document/d/198tgaH0XRTQIwwYOotU9fdzsmuULIWo4dc9YJAOjK9M/edit 

Digital Worksheet 2:

https://docs.google.com/document/d/19oFDFDHdhA435DQN-W3q83B6pLx-tXygzKMiA2LNZUU/edit

Circuit Playground Challenge

# SPDX-FileCopyrightText: 2017 Limor Fried for Adafruit Industries

#

# SPDX-License-Identifier: MIT

import board

import digitalio

try:

    from audiocore import WaveFile

except ImportError:

    from audioio import WaveFile

try:

    from audioio import AudioOut

except ImportError:

    try:

        from audiopwmio import PWMAudioOut as AudioOut

    except ImportError:

        pass  # not always supported by every board!

# Enable the speaker

spkrenable = digitalio.DigitalInOut(board.SPEAKER_ENABLE)

spkrenable.direction = digitalio.Direction.OUTPUT

spkrenable.value = True

# Make the 2 input buttons

buttonA = digitalio.DigitalInOut(board.BUTTON_A)

buttonA.direction = digitalio.Direction.INPUT

buttonA.pull = digitalio.Pull.DOWN

buttonB = digitalio.DigitalInOut(board.BUTTON_B)

buttonB.direction = digitalio.Direction.INPUT

buttonB.pull = digitalio.Pull.DOWN

# The two files assigned to buttons A & B

audiofiles = ["rimshot.wav", "laugh.wav"]

def play_file(filename):

    print("Playing file: " + filename)

    wave_file = open(filename, "rb")

    with WaveFile(wave_file) as wave:

        with AudioOut(board.SPEAKER) as audio:

            audio.play(wave)

            while audio.playing:

                pass

    print("Finished")

while True:

    if buttonA.value:

        play_file(audiofiles[0])

    if buttonB.value:

        play_file(audiofiles[1])

Digital Project Overview:

Unsoldered Amp PCB:

First Shaped PCB:

Soldered Amp PCB:

Progress Picture (12/13/2023)

Digital Project:

Gisthub Link: gist:e33bbd4055147933c23e896a008d2bef (github.com)  

For my digital project my goal was to make some sort of "button" where when you press it it creates an oinking sound. It was also important to me that you could make this sound without stopping any music playing on the speakers. In my actual project however, I decided to not make a button and instead an alligator clip where when you touch it completes a circuit, allowing the circuit playground to play the oink sound. I was also successful in having the sound play alongside the speakers. If I were to do this again, I would try to create a button for the oink as well as adding a cone like shape to the back of the playground so the sound would be louder. During the building process I learned about how the audio out portion of the circuit playground operates as well as how to place .wav files into the circuit playground folders. I faced some challenges with finding an alligator clip that had a thick enough plastic covering where touching the side of it didn't accidently complete the circuit. Overall, this portion of the speaker was challenging but rewarding and presented many learning opportunities.

Final Amplifer: