# Raspberry Pi Pico Shield Template ## Description Using the Raspberry Pi Pico microcontroller, I was able to design a hearing aid with volume control. The components and a description of why they were used: MCP3008 - CONVERTS ANALOG AUDIO SIGNALS INTO DIGITAL DATA CONVERTED BY THE MICROCONTROLLER MCP4725 - CONVERTS DIGITAL AUDIO SIGNALS TO ANALOG SO THE AUDIO CAN BE OUTPUTTED THROUGH A SPEAKER LM358 - USED TO AMPLIFY WEAK SIGNALS IN THE HEARING AID, REMOVES UNWANTED FREQUENCIES SPU0410LR5HQB - THIS COMPONENT IS A MICROPHONE, SPECIFICALLY CHOSEN BECAUSE IT IS OMNIDIRECTIONAL AND CAN CAPTURE AMBIENT SOUNDS, IT IS A SMALL COMPONENT PERFECTLY USED FOR NOISE REDUCTION, ASSISTING IN CAPTURING CLEAR AUDIO PAM8302AASCR - EFFICIENTLY AMPLIFIES AUDIO, AUDIO SIGNAL FROM DAC (VOUT) IS FED INTO THE INPUT OF THE AUDIO AMPLIFIER, WHICH OUTPUTS IDEAL FREQUENCY AUDIO CEM-1203(42) - SPEAKER WHICH OUTPUTS THE AUDIO AMPLIFIER MODIFIED FEATURE: POTENTIOMETER - WITH THE CCW CONNECTED TO GND, CW CONNECTED TO VDD, WIPER CONNECTED TO PIN 27 OF THE MICROCONTROLLER, THIS FEATURE IS A VOLUME ADJUSTER, WE ARE ABLE TO FULLY TURN OFF AND ON THE VOLUME BY ADJUSTING THE HEARING AID FOR THE IDEAL AUDIO OUTPUT ## Project Details - **Owner:** alishasingh - **Created:** 8/22/2024 - **Last Updated:** 8/22/2024 - **Visibility:** Public - **Copies:** 4 ## Key Components ### CEM-1203(42) - SPEAKER — [CEM-1203(42)](https://www.flux.ai/adrian95/cem-120342~oo.md) - Datasheet URL: https://www.cuidevices.com/product/resource/cem-1203-42-.pdf - License: https://creativecommons.org/licenses/by/4.0/ - Manufacturer Part Number: CEM-1203(42) - Manufacturer Name: CUI Devices - Part Type: Audio Product **Pins:** - - [pin N] - + [pin P] ### LM385 - OP AMP — [LM358P](https://www.flux.ai/jecstronic/lm358p~nus.md) - Manufacturer Part Number: LM358P - Datasheet URL: https://www.ti.com/general/docs/suppproductinfo.tsp?distId=10&gotoUrl=https%3A%2F%2Fwww.ti.com%2Flit%2Fgpn%2Flm358 - Part Type: Operational Amplifier (OP-AMP) - Manufacturer Name: Texas Instruments - License: https://creativecommons.org/licenses/by/4.0/ **Pins:** - -IN1 [pin 2] - -IN2 [pin 6] - +IN1 [pin 3] - +IN2 [pin 5] - OUT1 [pin 1] - OUT2 [pin 7] - V- [pin 4] - V+ [pin 8] ### MCP3008 - ADC — [MCP3008-I/P](https://www.flux.ai/adrian95/mcp3008-ip~02k.md) - Part Type: Integrated Circuit - Datasheet URL: https://ww1.microchip.com/downloads/en/DeviceDoc/21295d.pdf - Manufacturer Part Number: MCP3008-I/P - License: https://creativecommons.org/licenses/by/4.0/ - Manufacturer Name: Microchip Technology **Pins:** - AGND [pin 14] - CH0 [pin 1] - CH1 [pin 2] - CH2 [pin 3] - CH3 [pin 4] - CH4 [pin 5] - CH5 [pin 6] - CH6 [pin 7] - CH7 [pin 8] - CLK [pin 13] - DGND [pin 9] - DIN [pin 11] - DOUT [pin 12] - SHDN/CS [pin 10] - VDD [pin 16] - VREF [pin 15] ### MCP4725 - DAC — [MCP4725A0T-E/CH](https://www.flux.ai/vasyl/mcp4725a0t-ech~2be.md) - Manufacturer Part Number: MCP4725A0T-E/CH - Part Type: Integrated Circuit - Manufacturer Name: Microchip Technology - Datasheet URL: http://www.microchip.com/mymicrochip/filehandler.aspx?ddocname=en532676 **Pins:** - A0 [pin 6] - SCL [pin 5] - SDA [pin 4] - VDD [pin 3] - VOUT [pin 1] - VSS [pin 2] ### PAM8302AASCR - AUDIO AMPLIFIER — [PAM8302AASCR](https://www.flux.ai/adrian95/pam8302aascr~vym.md) - Manufacturer Part Number: PAM8302AASCR - Datasheet URL: https://www.diodes.com/assets/Datasheets/PAM8302A.pdf - Part Type: Integrated Circuit - License: https://creativecommons.org/licenses/by/4.0/ - Manufacturer Name: Diodes Incorporated **Pins:** - GND [pin 7] - IN- [pin 4] - IN+ [pin 3] - NC [pin 2] - SD [pin 1] - V_OUT- [pin 8] - V_OUT+ [pin 5] - VDD [pin 6] ### POTENTIOMETER — [PDB181-K420K-103B](https://www.flux.ai/adrian95/pdb181-k420k-103b~fyb.md) - Datasheet URL: https://www.bourns.com/docs/Product-Datasheets/PDB18.pdf - License: https://creativecommons.org/licenses/by/4.0/ - Manufacturer Name: Bourns Inc. - Manufacturer Part Number: PDB181-K420K-103B - Part Type: Potentiometer **Pins:** - CCW [pin 1] - CW [pin 3] - WIPER [pin 2] ### SPU0410LR5HQB - MICROPHONE — [SPU0410LR5H-QB-7](https://www.flux.ai/jecstronic/spu0410lr5h-qb-7~gxa.md) - License: https://creativecommons.org/licenses/by/4.0/ - Manufacturer Part Number: SPU0410LR5H-QB-7 - Datasheet URL: https://mm.digikey.com/Volume0/opasdata/d220001/medias/docus/384/SPU0410LR5H-QB_RevH_3-27-13.pdf - Manufacturer Name: Knowles - Part Type: Microphone **Pins:** - GND [pin 2] - GND [pin 6] - GND [pin 3] - GND [pin 5] - OUTPUT [pin 1] - VDD [pin 4] ### U1 — [Raspberry Pi Pico Shield](https://www.flux.ai/jharwinbarrozo/raspberry-pi-pico-shield~937.md) - Symbol Style: Parametric - Manufacturer Part Number: Pico - Part Type: Microcontroller **Pins:** - 3V3 [pin 36] - 3V3_EN [pin 37] - ADC_VREF [pin 35] - AGND [pin 33] - GND [pin 8] - GND [pin 23] - GND [pin 28] - GND [pin 3] - GND [pin 42] - GND [pin 13] - GND [pin 38] - GND [pin 18] - GPIO0 [pin 1] - GPIO1 [pin 2] - GPIO10 [pin 14] - GPIO11 [pin 15] - GPIO12 [pin 16] - GPIO13 [pin 17] - GPIO14 [pin 19] - GPIO15 [pin 20] - GPIO16 [pin 21] - GPIO17 [pin 22] - GPIO18 [pin 24] - GPIO19 [pin 25] - GPIO2 [pin 4] - GPIO20 [pin 26] - GPIO21 [pin 27] - GPIO22 [pin 29] - GPIO26_ADC0 [pin 31] - GPIO27_ADC1 [pin 32] - GPIO28_ADC2 [pin 34] - GPIO3 [pin 5] - GPIO4 [pin 6] - GPIO5 [pin 7] - GPIO6 [pin 9] - GPIO7 [pin 10] - GPIO8 [pin 11] - GPIO9 [pin 12] - RUN [pin 30] - SWCLK [pin 41] - SWDIO [pin 43] - VBUS [pin 40] - VSYS [pin 39] *The full schematic, PCB layout, bill of materials, and interactive design are available at [https://www.flux.ai/alishasingh/raspberry-pi-pico-shield-template~ju](https://www.flux.ai/alishasingh/raspberry-pi-pico-shield-template~ju).* --- *Generated from [https://www.flux.ai/alishasingh/raspberry-pi-pico-shield-template~ju](https://www.flux.ai/alishasingh/raspberry-pi-pico-shield-template~ju)*