2 layers20 × 109.9 mm
Circuit board
ltrooney/diy-synth
A repository containing a handful of utilities for my DIY Eurorack-based modular synthesizer. Snippets include a virtual wavetable oscillator, a step sequencer, and more.
8 parts7
2 layers80.8 × 99.9 mm
Circuit board
ltrooney/diy-synth7A repository containing a handful of utilities for my DIY Eurorack-based modular synthesizer. Snippets include a virtual wavetable oscillator, a step sequencer, and more.
- Size
- 80.8 × 99.9 mm
- Copper layers
- 2
- Thickness
- 1.6 mm
- Parts
- 71
- Nets
- 54
- Pads
- 256
- Tracks, vias
- 583, 98
- Pours
- 2
- Routed
- Yes
- KiCad
- KiCad 5 (file 20171130)
- Created
- 19 Apr 2021
- Updated
- 24 Oct 2021
Overview
Circuit board is an open-source printed circuit board by ltrooney, from the ltrooney/diy-synth repository on GitHub. It is a 2-layer board of 80.8 × 99.9 mm with 71 parts on 54 nets, routed with 583 tracks and 98 vias.
It is built around the ATMEGA328P-AU, TL072 and 74HC4051, with the LM1117-5.0 and MMBT3904 among its other parts. Its parts include 19 capacitors, 18 resistors, 11 diodes, 5 ICs and 5 connectors. It belongs with the audio and music boards and the AVR (ATmega, ATtiny) boards of this library.
Main components
5
ATMEGA328P-AU
TQFP-32(7x7)-40℃~+85℃ 1.8V~5.5V 10bit 1KB 20MHz 23 2KB 32KB 8 Bit AVR Built-in FLASH TQFP-32(7x7) Microcontrollers (MCU/MPU/SOC) ROHSMicrochip TechnologyMicrocontrollers (MCU/MPU/SOC)
TL072
SOP-8-18V~18V 0℃~+70℃ 1.4mA 1.5nA 10V/us 10mV 2 2.5nA 3MHz 85dB SOP-8 Operational Amplifier ROHSGcoreOperational Amplifier
74HC4051
SOP-16-40℃~+85℃ 1 170MHz 28ns 29ns 3V~9V 5ns 5pF 80Ω 8:1 SOP-16 Analog Switches, Multiplexers ROHSWuxi I-core ElecAnalog Switches, Multiplexers
LM1117-5.0
SOT-2231 1.3V@(1000mA) 15V 1A 2mA 5V Fixed Over Current Protection、Short Circuit Protection、Thermal shutdown Positive SOT-223 Voltage Regulators - Linear, Low Drop Out (LDO) Regulators ROHShongjiachengUncategorised
MMBT3904
SOT-23-55℃~+150℃ 1 NPN 100 100nA 200mA 200mW 300MHz 300mV 40V 6V NPN SOT-23 Bipolar (BJT) ROHSJiangsu Changjing Electronics Technology (CJ)Bipolar (BJT)
README
README.mddiy-synth
A repository containing a handfaul of utilities for my DIY Eurorack-based modular synthesizer. Snippets include a virtual wavetable oscillator, a step sequencer, and more...
Other (private) designs not featured include core analog synthesizer circuitry for sound generation, mixing, filtering, and envelope generation.
Parts
71| Qty | Value | Footprint | References |
|---|---|---|---|
| 11 | 100nF | Capacitors_SMD:C_0805_HandSoldering | C1, C4, C12, C13, C14, C15, C16, C17, C18, C19, C20 |
| 11 | 10K | Resistors_SMD:R_0805_HandSoldering | R1, R4, R6, R7, R8, R9, R10, R11, R12, R13, R15 |
| 10 | B100K | Potentiometer_THT:Potentiometer_Alpha_RD901F-40-00D_Single_Vertical | RV1, RV2, RV3, RV4, RV5, RV6, RV7, RV8, RV9, RV10 |
| 3 | 0.1uF | Capacitors_SMD:C_0805_HandSoldering | C9, C10, C11 |
| 3 | 10uF | Capacitors_SMD:CP_Elec_5x5.3 | C2, C5, C6 |
| 3 | 1K | Resistors_SMD:R_0805_HandSoldering | R5, R16, R17 |
| 3 | 1N4148 | Diodes_SMD:D_SOD-123 | D1, D2, D11 |
| 2 | 100K | Resistors_SMD:R_0805_HandSoldering | R2, R14 |
| 2 | 18pF | Capacitors_SMD:C_0805_HandSoldering | C7, C8 |
| 2 | 74HC4051 | Housings_SOIC:SOIC-16_3.9x9.9mm_Pitch1.27mm | U4, U5 |
| 1 | 16 MHz | Crystals:Crystal_SMD_HC49-SD_HandSoldering | Y1 |
| 1 | 1M | Resistors_SMD:R_0805_HandSoldering | R3 |
| 1 | 5.1k | Resistors_SMD:R_0805_HandSoldering | R20 |
| 1 | ATmega328P-AU | Housings_QFP:TQFP-32_7x7mm_Pitch0.8mm | U2 |
| 1 | CV Note | Connectors_Audio:Jack_3.5mm_QingPu_WQP-PJ398SM_Vertical_CircularHoles | J5 |
| 1 | Clock In | Connectors_Audio:Jack_3.5mm_QingPu_WQP-PJ398SM_Vertical_CircularHoles | J4 |
| 1 | Conn_01x10 | Connector_IDC:IDC-Header_2x05_P2.54mm_Vertical | J2 |
| 1 | Gate Out | Connectors_Audio:Jack_3.5mm_QingPu_WQP-PJ398SM_Vertical_CircularHoles | J6 |
| 1 | ISP Header | Connector_PinHeader_2.54mm:PinHeader_2x03_P2.54mm_Vertical | J1 |
| 1 | LM1117-5.0 | TO_SOT_Packages_SMD:SOT-223-3_TabPin2 | U1 |
| 1 | MMBT3904 | TO_SOT_Packages_SMD:SOT-23_Handsoldering | Q1 |
| 1 | SW_Push | Buttons_Switches_THT:SW_PUSH_6mm | SW1 |
| 1 | Step 1 LED | LEDs:LED_D5.0mm | D3 |
| 1 | Step 2 LED | LEDs:LED_D5.0mm | D5 |
| 1 | Step 3 LED | LEDs:LED_D5.0mm | D7 |
| 1 | Step 4 LED | LEDs:LED_D5.0mm | D9 |
| 1 | Step 5 LED | LEDs:LED_D5.0mm | D4 |
| 1 | Step 6 LED | LEDs:LED_D5.0mm | D6 |
| 1 | Step 7 LED | LEDs:LED_D5.0mm | D8 |
| 1 | Step 8 LED | LEDs:LED_D5.0mm | D10 |
| 1 | TL072 | Housings_SOIC:SOIC-8_3.9x4.9mm_Pitch1.27mm | U3 |
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Questions
How big is the Circuit board PCB?
It measures 80.8 × 99.9 mm and has 2 copper layers, 1.6 mm thick.
What parts does the Circuit board use?
71 parts, built around the ATMEGA328P-AU, TL072, 74HC4051 and LM1117-5.0. 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 Circuit board KiCad files?
From the ltrooney/diy-synth repository on GitHub, at the commit this page was made from: the board is sequencer/circuit_board/circuit_board.kicad_pcb. PCBKit opens the board in the browser, with nothing to install.
Can I use the Circuit board design in my own project?
Its repository states no licence, so its author keeps all rights: ask ltrooney before reusing the design.