2 layers30 × 100 mm
Curly memory interface board
rallen-device/curly-memory
Open source hardware for eurorack using ESP32
28 parts2MIT
4 layers30 × 100 mm
Curly memory kicad
rallen-device/curly-memory2Open source hardware for eurorack using ESP32
- Size
- 30 × 100 mm
- Copper layers
- 4
- Thickness
- 4.69 mm
- Parts
- 84
- Nets
- 85
- Pads
- 313
- Tracks, vias
- 1,179, 190
- Pours
- 2
- Routed
- Yes
- KiCad
- KiCad 6 (file 20211014)
- Created
- 12 Dec 2021
- Updated
- 24 Jan 2022
Overview
Curly memory kicad is an open-source printed circuit board by rallen-device, from the rallen-device/curly-memory repository on GitHub, published under the MIT licence. It is a 4-layer board of 30 × 100 mm with 84 parts on 85 nets, routed with 1,179 tracks and 190 vias.
It is built around the ESP32-WROOM-32, MCP4822-E/SN and MCP6004-E/P, with the MCP3008-I/SL, MCP42010-E/SL and BAV99 among its other parts. Its parts include 30 resistors, 29 capacitors, 10 ICs, 8 diodes and 7 connectors. It belongs with the audio and music boards and the ESP32 boards of this library.
Main components
7
ESP32-WROOM-32
SMD,18x25.5mm-40℃~+85℃ -98dBm 2.4GHz 2.7V~3.6V 20dBm Bluetooth4.2 ESP32-DOWDQ6 UART、SDIO、SPI、I2C、GPIO、PWM、ADC、DAC SMD,25.5x18mm WiFi Modules ROHSEspressif SystemsWiFi Modules
MCP4822-E/SN
SOIC-8-40℃~+125℃ 12 12LSB 2 2.7V~5.5V 4.5us 415uA 50ppm/℃ Built-in Built-in SPI Voltage Buffer SOIC-8 Digital to Analog Converters (DAC) ROHSMicrochip TechnologyDigital To Analog Converters (DAC)
MCP6004-E/P
PDIP-14-40℃~+125℃ 1.8V~6V 100uA 1MHz 1pA 1pA 23mA 28nV/√Hz@1kHz 2uV/℃ 4 4.5mV 600V/ms 76dB ESD protection Rail-to-Rail Input, Rail-to-Rail Output PDIP-14 Operational Amplifier ROHSMicrochip TechnologyOperational Amplifier
MCP3008-I/SL
SOIC-16-40℃~+85℃ 1.35MHz~3.6MHz 10 1LSB 2.7V~5.5V 200kHz 5nA 8 External Multiplexers SAR SPI Yes SOIC-16 Analog to Digital Converters (ADC) ROHSMicrochip TechnologyAnalog To Digital Converters (ADC)
MCP42010-E/SL
SOIC-14-40℃~+125℃ 10kΩ 1MHz 2 2.7V~5.5V 256 52Ω、73Ω 800ppm/℃ Linear SPI Soft reset、Power-on reset、Mute function SOIC-14 Digital Potentiometers ROHSMicrochip TechnologyDigital Potentiometers
BAV99
SOT-231 Pair Series Connection 1.25V@150mA 100V 215mA 250mW 4A 4ns 500nA@80V SOT-23 Switching Diodes ROHSNexperiaSwitching Diodes
S1A
SMA(DO-214AC)1 Independent 1.1V@1A 1A 30A 50V 5uA@50V SMA(DO-214AC) Diodes - General Purpose ROHSDiodes IncorporatedDiodes - General Purpose
README
README.mdCURLY-MEMORY
Open source eurorack hardware using an ESP32.
ESP32 acts like anything you want, just reprogram with new firmware.
Features
INPUTS:
- Analogue input x4
- 1/8" jack x3 (IN0, IN1, IN2)
- 2.54mm pin header x2 (IN2, IN3)
OUTPUTS:
- Analogue output x4
- 1/8" jack x3 (OUT0, OUT1, OUT2)
- 2.54mm pin header x3 (OUT2, OUT3)
CONTROLS:
- Potentiometer input x4
- Tactile switch x2
OTHER:
- Feedback resistor (digital pot connecting OUT0 to IN0)
- Digital pot output on 2.54mm pin header
- Dry/wet mixer (IN0 + OUT0 - connecting to digital pot)
- WS2812B LEDs x2
POWER:
- Eurorack standard 10 pin IDC connector
- 12V input
FIRMWARE:
- ESP-IDF or Arduino
Images
References
- https://www.electrosmash.com/pt2399-analysis
- https://intellijel.com/support/eurorack-101/
- https://docs.espressif.com/projects/esp-idf/en/latest/esp32/api-reference/peripherals/spi_master.html
Influences
Parts
84| Qty | Value | Footprint | References |
|---|---|---|---|
| 13 | 100nF | Capacitor_SMD:C_0805_2012Metric_Pad1.18x1.45mm_HandSolder | C101, C103, C104, C105, C106, C108, C109, C206, C207, C309, C310, C401, C408 |
| 11 | 100K | Resistor_SMD:R_0805_2012Metric_Pad1.20x1.40mm_HandSolder | R108, R201, R202, R203, R304, R305, R306, R307, R308, R309, R401 |
| 6 | 1K | Resistor_SMD:R_0805_2012Metric_Pad1.20x1.40mm_HandSolder | R101, R102, R103, R104, R105, R106 |
| 6 | 22pF | Capacitor_SMD:C_0805_2012Metric_Pad1.18x1.45mm_HandSolder | C201, C202, C203, C301, C302, C303 |
| 6 | 47k | Resistor_SMD:R_0805_2012Metric_Pad1.20x1.40mm_HandSolder | R204, R205, R206, R301, R302, R303 |
| 5 | 10uF | Capacitor_SMD:C_0805_2012Metric_Pad1.18x1.45mm_HandSolder | C402, C403, C404, C409, C410 |
| 5 | 1uF | Capacitor_SMD:C_0805_2012Metric_Pad1.18x1.45mm_HandSolder | C102, C110, C304, C305, C306 |
| 5 | Conn_01x05 | Connector_PinHeader_2.54mm:PinHeader_1x05_P2.54mm_Vertical | J102, J103, J104, J105, J106 |
| 4 | 100R | Resistor_SMD:R_0805_2012Metric_Pad1.20x1.40mm_HandSolder | R107, R207, R208, R209 |
| 4 | BAV99 | Package_TO_SOT_SMD:SOT-23 | D201, D202, D203, D204 |
| 2 | 150R | Resistor_SMD:R_0805_2012Metric_Pad1.20x1.40mm_HandSolder | R403, R404 |
| 2 | LED | LED_SMD:LED_0805_2012Metric_Pad1.15x1.40mm_HandSolder | D403, D404 |
| 2 | MCP42010-E/SL | Package_SO:SOIC-14_3.9x8.7mm_P1.27mm | U105, U106 |
| 2 | MCP4822-E/SN | Package_SO:SOIC-8_3.9x4.9mm_P1.27mm | U103, U104 |
| 2 | MCP6004 | Package_SO:SOIC-14_3.9x8.7mm_P1.27mm | U201, U301 |
| 2 | S1A | Diode_SMD:D_SMA | D401, D402 |
| 1 | 56k | Resistor_SMD:R_0805_2012Metric_Pad1.20x1.40mm_HandSolder | R402 |
| 1 | Conn_01x06 | Connector_PinHeader_2.54mm:PinHeader_1x05_P2.54mm_Vertical | J101 |
| 1 | Conn_02x05_Odd_Even | Connector_IDC:IDC-Header_2x05_P2.54mm_Horizontal | J401 |
| 1 | ESP32-WROOM-32 | RF_Module:ESP32-WROOM-32 | U102 |
| 1 | MCP3008-I/SL | Package_SO:SOIC-16_3.9x9.9mm_P1.27mm | U101 |
| 1 | NCP1117-3.3_SOT223 | Package_TO_SOT_SMD:SOT-223-3_TabPin2 | U402 |
| 1 | NCP1117-5.0_SOT223 | Package_TO_SOT_SMD:SOT-223-3_TabPin2 | U401 |
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Questions
How big is the Curly memory kicad PCB?
It measures 30 × 100 mm and has 4 copper layers, 4.69 mm thick.
What parts does the Curly memory kicad use?
84 parts, built around the ESP32-WROOM-32, MCP4822-E/SN, MCP6004-E/P and MCP3008-I/SL. 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 Curly memory kicad KiCad files?
From the rallen-device/curly-memory repository on GitHub, at the commit this page was made from: the board is hardware/curly-memory-kicad/curly-memory-kicad.kicad_pcb and its schematic hardware/curly-memory-face-plate/curly-memory-face-plate.kicad_sch. PCBKit opens the board in the browser, with nothing to install.
Can I use the Curly memory kicad 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).