4 layers247 × 81 mm
OTTO main
cester-ino/OTTO-hardware
those specs refer to the tactile buttons version, but a led backlight button version is in the works too.
142 parts49GPL-3.0
2 layers308.7 × 241.8 mm
OTTOtact
cester-ino/OTTO-hardware49those specs refer to the tactile buttons version, but a led backlight button version is in the works too.
- Size
- 308.7 × 241.8 mm
- Copper layers
- 2
- Thickness
- 1.6 mm
- Parts
- 229
- Nets
- 215
- Pads
- 964
- Tracks, vias
- 1,476, 103
- Pours
- 3
- Routed
- Yes
- KiCad
- KiCad 5 (file 20171130)
- Created
- 3 Aug 2018
- Updated
- 1 Dec 2018
Overview
OTTOtact is an open-source printed circuit board by cester-ino, from the cester-ino/OTTO-hardware repository on GitHub, published under the GPL-3.0 licence. It is a 2-layer board of 308.7 × 241.8 mm with 229 parts on 215 nets, routed with 1,476 tracks and 103 vias.
It is built around the ATMEGA32U4-AU, 74HC125D and LM3914, with the MCP602-I/P, MT3608 and FS312F-G among its other parts. Its parts include 83 diodes, 57 switches, 34 capacitors, 32 resistors and 9 ICs. It belongs with the audio and music boards and the AVR (ATmega, ATtiny) boards of this library.
Main components
10
ATMEGA32U4-AU
QFP-44(10x10)-40℃~+85℃ 10bit 16MHz 1KB 2.5KB 2.7V~5.5V 26 32KB 8 Bit AVR Built-in FLASH QFP-44(10x10) Microcontrollers (MCU/MPU/SOC) ROHSMicrochip TechnologyMicrocontrollers (MCU/MPU/SOC)
74HC125D
SO-14-40℃~+125℃ 1 11ns@4.5V,50pF 160uA 2V~6V 4 7.8mA 7.8mA 74HC Tri-State Unidirectional SOIC-14 Buffers, Drivers, Receivers, Transceivers ROHSNexperiaBuffers, Drivers, Receivers, Transceivers
LM3914
DIP-18DIP-18 LED Drivers ROHSGcoreLED Drivers
MCP602-I/P
PDIP-8-40℃~+85℃ 1pA 1pA 2 2.3V/us 2.5uV/℃ 2.7V~6V 2.8MHz 22mA 230uA 29nV/√Hz@1kHz 700uV 90dB Built-in compensation、ESD protection Rail-to-rail output PDIP-8 Operational Amplifier ROHSMicrochip TechnologyOperational Amplifier
MT3608
SOT-23-6-40℃~+85℃ 1 1.2MHz 100uA、1.6mA 2A 2V~24V Adjustable Boost Boost Built-in No SOT-23-6 DC-DC Converters ROHS西安航天民芯DC-DC ConvertersFS312F-G
SOT-23-6-40℃~+85℃ 1 2.9V 2V~4.275V 3uA Lithium Battery Not supported Protection IC SOT-23-6 Battery Management ROHSFortune SemiconBattery Management
TP4056
ESOP-8-40℃~+85℃ 1 1A 35uA 4.2V 4V~6.5V Charging IC Lithium Battery Support Support 恒流充电、恒压充电、涓流充电、自动再充电、充电终止、可编程充电电流、软启动、欠压锁定 ESOP-8 Battery Management ROHSUMWBattery Management
WS2812B
5mm X 5mm Surface Mount RGB LED with Intelligent ControlWorldsemiUncategorisedFS8205
SOT-23-6-55℃~+150℃ 1.2V 1W 2 N-Channel 20V 37mΩ@2.5V 6A N-Channel SOT-23-6 MOSFETs ROHSFORTUNEMOSFETs
SS34
SMA(DO-214AC)-55℃~+125℃ 3A 40V 500uA@40V 550mV@3A Independent SMA(DO-214AC) Schottky Diodes ROHSMDDSchottky Diodes
README
README.mdOTTO-project
Hardware prototype for the OTTO Synthesizer by Topisani
10x10 silicone buttons with led backlight
Main features
Mainboard
- ILI9341 based TFT 2.8" TFT screen.
- 4 low profile clickable encoders
- 40 function keys
- STM32F103VET6 mcu
- Raspberry GPIO connector
- connects to all the various boards
- expansion headers
Power board
- 2A 5-16V DC input & 500mah micro usb input
- MAX8903A 1s Lipo charger IC with path management
- 5V 2A DC-DC boost converter (TPS61090) & 3V3 700mah LDO (XC6210)
- MAX17048 1s lipo fuel gauge, connected via i2c to the raspberry
- pi_power circuit for monitoring and control boot and shutdown routine
Audio Board
- SGTL5000 Audio Codec
- Electret microphone amp circuit
- LM4860 speaker amplifier
- 1 TRS jack line IN
- 1 TRS jack line OUT
- 1 Headphone IN
Keyboard
- 2 octaves keyboard with 16 keys bottom row
- expansion headers
- 16 addressable rgb leds
those specs refer to the tactile buttons version, but a led backlight button version is in the works too.
one of the first design iteration
Parts
229| Qty | Value | Footprint | References |
|---|---|---|---|
| 56 | 1N4148 | Diode_SMD:D_SOD-123v | D2, D10, D11, D12, D13, D14, D15, D16, D17, D18, D19, D20, D21, D22, D23, D24 +40 |
| 52 | SW_Push | Button_Switch_Keyboard:kaihl-low-profile-switch-noled | SW1, SW2, SW10, SW11, SW12, SW13, SW14, SW15, SW16, SW17, SW18, SW19, SW20, SW21, SW22, SW23 +36 |
| 17 | 0.1uf | Capacitor_SMD:C_0805_2012Metric | C16, C17, C18, C19, C20, C21, C22, C23, C24, C25, C26, C27, C28, C29, C30, C31 +1 |
| 17 | WS2812B | LED_SMD:LED_WS2812B_PLCC4_5.0x5.0mm_P3.2mm | D66, D67, D68, D69, D70, D71, D72, D73, D74, D75, D76, D77, D78, D79, D80, D81 +1 |
| 14 | 10K | Resistor_SMD:R_0805_2012Metric | R1, R3, R4, R5, R6, R7, R8, R9, R10, R11, R12, R30, R31, R32 |
| 11 | 0.1uF | Capacitor_SMD:C_0805_2012Metric | C1, C5, C6, C7, C8, C9, C10, C11, C13, C33, C34 |
| 5 | 1K | Resistor_SMD:R_0805_2012Metric | R17, R19, R20, R21, R26 |
| 5 | LED_Small | LED_SMD:LED_0805_2012Metric | D61, D62, D63, D64, D65 |
| 4 | Rotary_Encoder_Switch | Rotary_Encoder:RotaryEncoder_Alps_EC12E-Switch_Vertical_H20mm_CircularMountingHoles | SW53, SW54, SW55, SW56 |
| 3 | IN4001 | Diode_SMD:D_SOD-123F | D83, D84, D85 |
| 2 | 1.5K | Resistor_SMD:R_0805_2012Metric | R13, R15 |
| 2 | 100K | Resistor_SMD:R_0805_2012Metric | R23, R28 |
| 2 | 22pF | Capacitor_SMD:C_0805_2012Metric | C3, C4 |
| 2 | 22uF | Capacitor_SMD:C_1812_4532Metric | C14, C15 |
| 1 | 10K | 3362P-1-103LF:3362P_1 | RV1 |
| 1 | 10uF | Capacitor_SMD:C_0805_2012Metric | C12 |
| 1 | 15K | Resistor_SMD:R_0805_2012Metric | R18 |
| 1 | 16mhz | Crystal:Crystal_SMD_Abracon_ABM3-2Pin_5.0x3.2mm | Y1 |
| 1 | 1uF | Capacitor_SMD:C_0805_2012Metric | C2 |
| 1 | 2.7k | Resistor_SMD:R_0805_2012Metric | R24 |
| 1 | 22uH | Inductor_SMD:L_Wuerth_HCI-1040 | L1 |
| 1 | 2N7000 | Package_TO_SOT_THT:TO-92_Inline | Q1 |
| 1 | 2k | Resistor_SMD:R_0805_2012Metric | R22 |
| 1 | 330 | Resistor_SMD:R_0805_2012Metric | R29 |
| 1 | 330K | Resistor_SMD:R_0805_2012Metric | R2 |
| 1 | 4.7K | Resistor_SMD:R_0805_2012Metric | R27 |
| 1 | 470K | Resistor_SMD:R_0805_2012Metric | R14 |
| 1 | 7.5K | Resistor_SMD:R_0805_2012Metric | R25 |
| 1 | 74HC125 | Package_SO:SOIC-14_3.9x8.7mm_P1.27mm | IC1 |
| 1 | 820K | Resistor_SMD:R_0805_2012Metric | R16 |
| 1 | ATMEGA32U4-AU | Package_QFP:TQFP-44-1EP_10x10mm_P0.8mm_EP4.5x4.5mm | U1 |
| 1 | Conn_01x02 | Connector_PinHeader_2.54mm:PinHeader_1x02_P2.54mm_Vertical | J8 |
| 1 | Conn_01x04_Male | Connector_JST:JST_SH_SM04B-SRSS-TB_1x04-1MP_P1.00mm_Horizontal | J3 |
| 1 | Conn_01x06 | Connector_PinHeader_2.54mm:PinHeader_1x06_P2.54mm_Vertical | J7 |
| 1 | FS312F-G | Package_TO_SOT_SMD:SOT-23-6 | U5 |
| 1 | FS8205 | Package_TO_SOT_SMD:SOT-23-6_Handsoldering | M1 |
| 1 | LED | LED_SMD:LED_0805_2012Metric | D1 |
| 1 | LM3914 | Package_DIP:DIP-18_W7.62mm | IC2 |
| 1 | MCP602 | Package_SO:SOIC-8_3.9x4.9mm_P1.27mm | U3 |
| 1 | MT3608 | Package_TO_SOT_SMD:SOT-23-6 | U6 |
| 1 | ON_OFF_SWITCH | Button_Switch_THT:SK-12E12-G5 | SW57 |
| 1 | OTTO-dac | Connector:OTTO_DACv0.1 | U7 |
| 1 | SS34 | Diode_SMD:D_SMB | D60 |
| 1 | SolderJumper_2_Open | Jumper:SolderJumper-2_P1.3mm_Open_RoundedPad1.0x1.5mm | JP1 |
| 1 | TJCTM24028-SPI | Display:TJCTM24028-SPI | U2 |
| 1 | TP4056 | Package_SO:Texas_HTSOP-8-1EP_3.9x4.9mm_P1.27mm_EP2.95x4.9mm_Mask2.4x3.1mm_ThermalVias | U4 |
| 1 | USB | Connector_PinHeader_2.54mm:PinHeader_1x04_P2.54mm_Vertical | J1 |
| 1 | USB_B_Micro | Connector_USB:USB_Micro-B_Molex-105017-0001 | J5 |
| 1 | battery | Connector_JST:JST_XH_B02B-XH-A_1x02_P2.50mm_Vertical | J6 |
| 1 | gpio_exp1 | Connector_PinHeader_2.54mm:PinHeader_2x20_P2.54mm_Vertical | J4 |
| 1 | gpio_exp2 | Connector_PinHeader_2.54mm:PinHeader_2x20_P2.54mm_Vertical | J2 |
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Questions
How big is the OTTOtact PCB?
It measures 308.7 × 241.8 mm and has 2 copper layers, 1.6 mm thick.
What parts does the OTTOtact use?
229 parts, built around the ATMEGA32U4-AU, 74HC125D, LM3914 and MCP602-I/P. 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 OTTOtact KiCad files?
From the cester-ino/OTTO-hardware repository on GitHub, at the commit this page was made from: the board is OTTO-old/OTTOtact.kicad_pcb. PCBKit opens the board in the browser, with nothing to install.
Can I use the OTTOtact design in my own project?
Its repository publishes it under the GPL-3.0 licence: you may reuse it on that licence's terms (keep the author's notice, and for a copyleft licence share your changes alike).