2 layers148.6 × 192.2 mm
Badge
NuttyShell/NuttyBadge
NuttyBadge: A NuttyShell crafted multi-tool. Opensourced Hardawre and Software
169 parts31GPL-3.0
2 layers164 × 82.4 mm
Pico synth
HackerSchool/pico-synth5Pico based I2S Synthesizer
- Size
- 164 × 82.4 mm
- Copper layers
- 2
- Thickness
- 1.6 mm
- Parts
- 151
- Nets
- 181
- Pads
- 653
- Tracks, vias
- 831, 237
- Pours
- 5
- Routed
- Yes
- KiCad
- KiCad 8.0 (file 20240108)
- Created
- 14 Mar 2025
- Updated
- 14 Apr 2026
Overview
Pico synth is an open-source printed circuit board by HackerSchool, from the HackerSchool/pico-synth repository on GitHub, published under the GPL-3.0 licence. It is a 2-layer board of 164 × 82.4 mm with 151 parts on 181 nets, routed with 831 tracks and 237 vias.
It is built around the PCF8574T, AMS1117-3.3 and 1N4148WS. Its parts include 44 resistors, 32 diodes, 21 capacitors, 20 switches and 13 connectors. It belongs with the audio and music boards and the RP2040 boards of this library.
Main components
3
PCF8574T
SOP-16-300mil-40℃~+85℃ 100kHz 10uA 2.5V~6V 25mA 300uA 8 8 Cascading and address extension、Built-in LED driver I2C Interrupt Output Open-drain SOP-16-300mil I/O Expanders ROHSHGSEMII/O Expanders
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
1N4148WS
SOD-3231.25V@150mA 100V 150mA 1uA@75V 200mW 2A 4ns Independent SOD-323 Switching Diodes ROHSJiangsu Changjing Electronics Technology (CJ)Switching Diodes
README
hardware/electronics/README.mdPico Synth Hardware
The Pico-Synth Board v0.1 is the first version of the synthesizer, featuring a DAC with line-out, a 4x4 switch matrix with individual LEDs, four rotary encoders with switches, an OLED screen, and an SD card slot for optional storage. This fist iteration of the board was designed with a focus on low cost and component availability.
Parts
151| Qty | Value | Footprint | References |
|---|---|---|---|
| 28 | 1k | Cern_Ignition:R_0805_2012Metric_Pad1.20x1.40mm_HandSolder_modif | R10, R11, R12, R13, R14, R15, R16, R17, R18, R19, R20, R23, R24, R25, R26, R27 +12 |
| 16 | 100nF | Cern_Ignition:C_0805_2012Metric_Pad1.18x1.45mm_HandSolder_modif | C15, C17, C18, C19, C20, C21, C22, C23, C24, C25, C26, C27, C28, C30, C32, C36 |
| 16 | 1N4148WS | Diode_SMD:D_0805_2012Metric_Pad1.15x1.40mm_HandSolder | D2, D3, D4, D5, D6, D7, D8, D9, D10, D11, D12, D13, D14, D15, D16, D17 |
| 16 | LED | LED_SMD:LED_1210_3225Metric_Pad1.42x2.65mm_HandSolder | D18, D19, D20, D21, D22, D23, D24, D25, D26, D27, D28, D29, D30, D31, D32, D33 |
| 16 | SW_Push_45deg | Cherry_MX_switches:Cherry-MX_PCB-Mounted_LTST-A683CEGBW_Kailh_Socket_modif | SW5, SW6, SW7, SW8, SW9, SW10, SW11, SW12, SW13, SW14, SW15, SW16, SW17, SW18, SW19, SW20 |
| 12 | 10k | Cern_Ignition:R_0805_2012Metric_Pad1.20x1.40mm_HandSolder_modif | R31, R32, R45, R46, R47, R48, R49, R50, R51, R52, R53, R54 |
| 6 | Conn_01x14_Socket | Connector_PinHeader_2.54mm:PinHeader_1x14_P2.54mm_Vertical | J9, J10, J11, J12, J13, J14 |
| 4 | 2.2uF | Cern_Ignition:C_0805_2012Metric_Pad1.18x1.45mm_HandSolder_modif | C16, C29, C31, C35 |
| 4 | 4.7k | Cern_Ignition:R_0805_2012Metric_Pad1.20x1.40mm_HandSolder_modif | R7, R8, R21, R22 |
| 4 | A2_Jumper | Jumper:SolderJumper-3_P1.3mm_Open_RoundedPad1.0x1.5mm_NumberLabels | JP7, JP10, JP13, JP14 |
| 4 | MountingHole_Pad | MountingHole:MountingHole_2.2mm_M2_Pad_Via | H1, H2, H3, H4 |
| 4 | RotaryEncoder_Switch_MP | Lame_Lib:RotaryEncoder_Alps_EC11E-Switch_Vertical_H20mm_CircularMountingHoles | SW1, SW2, SW3, SW4 |
| 3 | A0_Jumper | Jumper:SolderJumper-3_P1.3mm_Open_RoundedPad1.0x1.5mm_NumberLabels | JP5, JP8, JP11 |
| 3 | A1_Jumper | Jumper:SolderJumper-3_P1.3mm_Open_RoundedPad1.0x1.5mm_NumberLabels | JP6, JP9, JP12 |
| 3 | PCF8574 | Package_SO:SOIC-16W_7.5x10.3mm_P1.27mm | U5, U6, U7 |
| 2 | Conn_01x01_Socket | Connector_PinHeader_2.54mm:PinHeader_1x01_P2.54mm_Vertical | J7, J8 |
| 2 | Conn_01x06_Socket | Connector_PinSocket_2.54mm:PinSocket_1x06_P2.54mm_Vertical | J1, J6 |
| 1 | 10uF | Cern_Ignition:C_1206_3216Metric_Pad1.33x1.80mm_HandSolder_modif | C37 |
| 1 | AMS1117-3.3 | Package_TO_SOT_SMD:SOT-223-3_TabPin2 | U8 |
| 1 | Conn_01x04_Socket | Connector_PinSocket_2.54mm:PinSocket_1x04_P2.54mm_Vertical | J3 |
| 1 | Conn_01x09_Socket | Connector_PinSocket_2.54mm:PinSocket_1x09_P2.54mm_Vertical | J4 |
| 1 | Line_Out | Connector_PinHeader_2.54mm:PinHeader_1x04_P2.54mm_Vertical | J5 |
| 1 | Pico | Pi_Pico:RPi_Pico_SMD_TH_No_Debug | U1 |
| 1 | SolderJumper_2_Open | Jumper:SolderJumper-2_P1.3mm_Open_RoundedPad1.0x1.5mm | JP15 |
The 150 most common of 151 parts.
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Questions
How big is the Pico synth PCB?
It measures 164 × 82.4 mm and has 2 copper layers, 1.6 mm thick.
What parts does the Pico synth use?
151 parts, built around the PCF8574T, AMS1117-3.3 and 1N4148WS. 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 Pico synth KiCad files?
From the HackerSchool/pico-synth repository on GitHub, at the commit this page was made from: the board is hardware/electronics/PicoSynth.kicad_pcb and its schematic hardware/electronics/PicoSynth.kicad_sch. PCBKit opens the board in the browser, with nothing to install.
Can I use the Pico synth 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).