2 layers150 × 110 mm
2 layers84 × 89 mm
PENDAII Hardware
DADDesign-Projects/PENDAII-Hardware4Welcome to the PENDAII project! This repository contains the schematics and PCB layouts created with KiCad 9.0 for a digital audio effects platform based on the Daisy-Seed board from ElectroSmith.
- Size
- 84 × 89 mm
- Copper layers
- 2
- Thickness
- 1.6 mm
- Parts
- 91
- Nets
- 79
- Pads
- 300
- Tracks, vias
- 788, 91
- Pours
- 7
- Routed
- Yes
- KiCad
- KiCad 9.0 (file 20241229)
- Created
- 12 May 2025
- Updated
- 12 Jul 2026
Overview
PENDAII Hardware is an open-source printed circuit board by DADDesign-Projects, from the DADDesign-Projects/PENDAII-Hardware repository on GitHub, published under the MIT licence. It is a 2-layer board of 84 × 89 mm with 91 parts on 79 nets, routed with 788 tracks and 91 vias.
It is built around the B1209S-2W, CS3310 and NE5532, with the OPA2132U, AMS1117-3.3 and H11L1 among its other parts. Its parts include 34 capacitors, 27 resistors, 11 ICs, 8 connectors and 4 switches.
Main components
6B1209S-2W
SIP,19.6x7mm-40℃~+85℃ 1 10.16mm 10.8V~13.2V 1000uF 19.65mm 222mA 250kHz 2W 60mVp-p 7.05mm 84% 9V SIP,19.6x7mm Isolated Power Modules ROHSLZTECIsolated Power Modules
CS3310
SOIC-16-300mil0℃~+70℃ 4.75V~5.25V Volume Control SOIC-16-300mil Audio Interface ICs ROHSCirrus LogicAudio Interface ICs
NE5532
SOP-8-22V~22V 0℃~+70℃ 100dB 10nA 14mA 2 40V/us 42mA 4mV 800nA 8nV/√Hz@30Hz Built-in compensation SOP-8 Operational Amplifier ROHSSungineOperational Amplifier
OPA2132U
SOIC-8-18V~-2.5V、2.5V~18V -40℃~+85℃ 100dB 2 20V/us 250uV 2pA 2uV/℃ 36mA 4mA 5pA 8MHz 8nV/√Hz@1kHz 9V~36V Built-in compensation、High capacitive load driving SOIC-8 FET Input Amplifiers ROHSTexas InstrumentsFET Input Amplifiers
AMS1117-3.3
SOT-223-40℃~+125℃ 0.003%Vout 1 1.1V@(800mA) 15V 1A 3.3V 5mA 72dB@(120Hz) Fixed Over Current Protection、Short Circuit Protection、Thermal shutdown Positive SOT-223 Voltage Regulators - Linear, Low Drop Out (LDO) Regulators ROHSAdvanced Monolithic SystemsVoltage Regulators - Linear, Low Drop Out (LDO) Regulators
H11L1
DIP-6-55℃~+100℃ 1 1.6mA 1Mbit/s 250mW 3V~15V 5kV DC DIP-6 Logic Output Optoisolators ROHSEverlight ElectronicsLogic Output Optoisolators
README
README.md⚠️ DEPRECATED: This project has been abandoned in favor of OSCAR. Please use that instead.
PENDAII: Platform for Effects oN DAisy
Welcome to the PENDAII project! This repository contains the schematics and PCB layouts created with KiCad 9.0 for a digital audio effects platform based on the Daisy-Seed board from ElectroSmith.
Author
DAD Design
Overview / Features
PENDAII is the second version of the PENDA platform. It introduces stereo processing and improved management of signal paths and power supplies.
What’s New in PENDAII:
- Stereo processing: a second audio channel has been added for a wider and more immersive sound experience.
- Digital input volume control: the input gain is now precisely adjustable via a digital potentiometer.
- Digital Dry/Wet mix control: the ratio between the processed (wet) and original (dry) signal is digitally managed.
- 100% analog Dry path: although controlled digitally, the dry signal remains fully analog to preserve audio quality.
General Features:
- Mono or Stereo Audio Input/Output: flexible integration into various audio setups.
- Two momentary footswitches: for hands-free activation of effects.
- 2-inch SPI display: clean and compact user interface (compatible with most ST7789 displays).
- MIDI input: allows control via external MIDI devices.
- User controls:
- 4 encoders with push-button: for parameter navigation and adjustment.
- 3 analog potentiometers: for direct control of parameters such as input level or Dry/Wet mix.
Content
- The Fab directory contains all necessary files for fabrication.
- The PENDAII-Hardware directory contains the source files for the KiCad 9.0 project.
Software
PENDAII-Software is a collection of audio effects built on an advanced software architecture, specifically designed for the PENDAII hardware platform.
Contributing
Contributions are welcome! If you'd like to suggest an improvement or fix an issue, feel free to open an issue or a pull request.
License
This project is licensed under the MIT License.
Parts
91| Qty | Value | Footprint | References |
|---|---|---|---|
| 15 | 100n | Capacitor_SMD:C_0805_2012Metric_Pad1.18x1.45mm_HandSolder | C9, C10, C11, C12, C14, C15, C18, C21, C22, C23, C24, C25, C27, C33, C34 |
| 10 | 10k | Resistor_SMD:R_1206_3216Metric_Pad1.30x1.75mm_HandSolder | R1, R4, R5, R8, R9, R10, R11, R14, R15, R18 |
| 8 | 47k | Resistor_SMD:R_1206_3216Metric_Pad1.30x1.75mm_HandSolder | R2, R7, R19, R20, R21, R22, R23, R24 |
| 4 | 100p | Capacitor_SMD:C_1206_3216Metric_Pad1.33x1.80mm_HandSolder | C2, C3, C4, C5 |
| 4 | 10u | Capacitor_SMD:C_1206_3216Metric_Pad1.33x1.80mm_HandSolder | C29, C30, C31, C32 |
| 3 | 100u | Capacitor_SMD:CP_Elec_6.3x7.7 | C16, C19, C28 |
| 3 | 20u | Capacitor_SMD:CP_Elec_5x5.4 | C13, C17, C20 |
| 2 | 100k | Resistor_SMD:R_1206_3216Metric_Pad1.30x1.75mm_HandSolder | R13, R16 |
| 2 | 1u | Capacitor_SMD:C_1206_3216Metric_Pad1.33x1.80mm_HandSolder | C7, C8 |
| 2 | 220k | Resistor_SMD:R_1206_3216Metric_Pad1.30x1.75mm_HandSolder | R3, R6 |
| 2 | 220n | Capacitor_SMD:C_1206_3216Metric_Pad1.33x1.80mm_HandSolder | C1, C6 |
| 2 | 22k | Resistor_SMD:R_1206_3216Metric_Pad1.30x1.75mm_HandSolder | R12, R17 |
| 2 | CS3310 | Package_SO:SOIC-16W_7.5x10.3mm_P1.27mm | U2, U4 |
| 2 | FerriteBead_Small | Inductor_SMD:L_0805_2012Metric_Pad1.15x1.40mm_HandSolder | FB3, FB4 |
| 2 | FerriteBead_Small | Inductor_SMD:L_1206_3216Metric_Pad1.22x1.90mm_HandSolder | FB1, FB2 |
| 2 | L78L05_SOT89 | Package_TO_SOT_SMD:SOT-89-3 | U8, U9 |
| 1 | 0 | Resistor_SMD:R_1206_3216Metric_Pad1.30x1.75mm_HandSolder | R27 |
| 1 | 1N914 | Diode_THT:D_DO-35_SOD27_P7.62mm_Horizontal | D1 |
| 1 | 220 | Resistor_THT:R_Axial_DIN0204_L3.6mm_D1.6mm_P7.62mm_Horizontal | R26 |
| 1 | 22u | Capacitor_SMD:CP_Elec_5x5.4 | C26 |
| 1 | 470 | Resistor_THT:R_Axial_DIN0204_L3.6mm_D1.6mm_P7.62mm_Horizontal | R25 |
| 1 | A1209S 3W | @Projet:Converter_DCDC_TRACO_TBA2-xxxx_Dual_THT | PS1 |
| 1 | AMS1117-3.3 | Package_TO_SOT_SMD:SOT-223-3_TabPin2 | U11 |
| 1 | Alim 12V | Connector_PinHeader_2.54mm:PinHeader_1x02_P2.54mm_Vertical | J8 |
| 1 | Audio_InL | Connector_PinHeader_2.54mm:PinHeader_1x02_P2.54mm_Vertical | J1 |
| 1 | Audio_InR | Connector_PinHeader_2.54mm:PinHeader_1x02_P2.54mm_Vertical | J2 |
| 1 | Audio_OutL | Connector_PinHeader_2.54mm:PinHeader_1x02_P2.54mm_Vertical | J3 |
| 1 | Audio_OutR | Connector_PinHeader_2.54mm:PinHeader_1x02_P2.54mm_Vertical | J4 |
| 1 | B1209S | @Projet:Converter_DCDC_TRACO_TBA2-xxxx_Single_THT | PS2 |
| 1 | Daisy Seed | Package_DIP:DIP-40_W15.24mm_Socket_LongPads | U3 |
| 1 | Encoder0 | Rotary_Encoder:RotaryEncoder_Alps_EC11E-Switch_Vertical_H20mm | SW1 |
| 1 | Encoder1 | Rotary_Encoder:RotaryEncoder_Alps_EC11E-Switch_Vertical_H20mm | SW2 |
| 1 | Encoder2 | Rotary_Encoder:RotaryEncoder_Alps_EC11E-Switch_Vertical_H20mm | SW3 |
| 1 | Encoder3 | Rotary_Encoder:RotaryEncoder_Alps_EC11E-Switch_Vertical_H20mm | SW4 |
| 1 | H11L1 | Package_DIP:DIP-6_W7.62mm | U7 |
| 1 | Jack MIDI | Connector_PinHeader_2.54mm:PinHeader_1x02_P2.54mm_Vertical | J7 |
| 1 | L79L05_SOT89 | Package_TO_SOT_SMD:SOT-89-3 | U10 |
| 1 | NE5532 | Package_SO:SOP-8_3.76x4.96mm_P1.27mm | U5 |
| 1 | OPA2132 | Package_SO:SOP-8_3.76x4.96mm_P1.27mm | U1 |
| 1 | Switch 1 | Connector_PinHeader_2.54mm:PinHeader_1x02_P2.54mm_Vertical | J5 |
| 1 | Switch 2 | Connector_PinHeader_2.54mm:PinHeader_1x02_P2.54mm_Vertical | J6 |
| 1 | TFT 2p | Connector_PinSocket_2.54mm:PinSocket_1x08_P2.54mm_Vertical | U6 |
Questions
How big is the PENDAII Hardware PCB?
It measures 84 × 89 mm and has 2 copper layers, 1.6 mm thick.
What parts does the PENDAII Hardware use?
91 parts, built around the B1209S-2W, CS3310, NE5532 and OPA2132U. The full list of its parts is on this page, with links to each part's symbol and footprint where PCBKit's library has them.
Where can I download the PENDAII Hardware KiCad files?
From the DADDesign-Projects/PENDAII-Hardware repository on GitHub, at the commit this page was made from: the board is PENDAII-Hardware.kicad_pcb and its schematic Alim_sch.kicad_sch. PCBKit opens the board in the browser, with nothing to install.
Can I use the PENDAII Hardware design in my own project?
Its repository publishes it under the MIT licence: you may reuse it on that licence's terms (keep the author's notice, and for a copyleft licence share your changes alike).
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