2 layers31 × 0 mm
2 layers138.6 × 102 mm
Helmute PCBs
nmemmolo/HelmuteSenior design project files
- Size
- 138.6 × 102 mm
- Copper layers
- 2
- Thickness
- 1.6 mm
- Parts
- 59
- Nets
- 122
- Pads
- 324
- Tracks, vias
- 580, 26
- Pours
- 3
- Routed
- Yes
- KiCad
- KiCad 8.0 (file 20240108)
- Created
- 12 Dec 2024
- Updated
- 15 May 2025
Overview
Helmute PCBs is an open-source printed circuit board by nmemmolo, from the nmemmolo/Helmute repository on GitHub. It is a 2-layer board of 138.6 × 102 mm with 59 parts on 122 nets, routed with 580 tracks and 26 vias.
It is built around the TEENSY 4.1 and SGTL5000XNLA3. Its parts include 10 resistors, 8 capacitors, 8 ICs, 6 connectors and 4 switches. It belongs with the NXP (LPC, Kinetis, i.MX RT) boards of this library.
Main components
2Parts
59| Qty | Value | Footprint | References |
|---|---|---|---|
| 9 | VAL** | Panelization:mouse-bite-2mm-slot | mouse-bite-2mm-slot, mouse-bite-2mm-slot1, mouse-bite-2mm-slot2, mouse-bite-2mm-slot3, mouse-bite-2mm-slot4, mouse-bite-2mm-slot5, mouse-bite-2mm-slot6, mouse-bite-2mm-slot7, mouse-bite-2mm-slot8 |
| 6 | MountingHole | MountingHole:MountingHole_3.2mm_M3 | H1, H2, H3, H4, H5, H6 |
| 5 | 8.2k | Resistor_SMD:R_0805_2012Metric | R5, R6, R7, R8, R10 |
| 4 | 0.1uF | Capacitor_SMD:C_0805_2012Metric | C3, C4, C5, C6 |
| 4 | 2.2uF | Capacitor_SMD:C_0805_2012Metric | C1, C2, C7, C8 |
| 3 | 4.7k | Resistor_SMD:R_0805_2012Metric | R1, R2, R4 |
| 3 | Conn_01x08_Socket | Connector_JST:JST_XH_S8B-XH-A_1x08_P2.50mm_Horizontal | J3, J4, J7 |
| 3 | SW_Push | Button_Switch_THT:SW_PUSH_6mm | SW2, SW3, SW4 |
| 2 | 100 | Resistor_SMD:R_0805_2012Metric | R3, R9 |
| 2 | Board | PCM_kikit:Board | B1, B2 |
| 2 | I2S MEMS Mic SPH0645 | Helmute:I2S SPK0415HM4H | U7, U8 |
| 1 | 600 | Capacitor_SMD:C_0805_2012Metric | FB1 |
| 1 | Adafruit TPA2016D2 | Helmute:TPA22016D2new | U4 |
| 1 | Adafruit bq25185 | Helmute:bq25185 5V Boost Breakout | U2 |
| 1 | AudioB I2S V3 | Helmute:AudioB | U3 |
| 1 | Conn_01x08_Pin | Connector_JST:JST_XH_S8B-XH-A_1x08_P2.50mm_Horizontal | J5 |
| 1 | Conn_01x12_Pin | Connector_PinHeader_2.54mm:PinHeader_2x06_P2.54mm_Vertical | J2 |
| 1 | Conn_01x12_Socket | Connector_PinHeader_2.54mm:PinHeader_2x06_P2.54mm_Vertical | J1 |
| 1 | LED | LED_THT:LED_D5.0mm | D1 |
| 1 | LOGO | Helmute:UD | G*** |
| 1 | LOGO | Helmute:Helmet | G*** |
| 1 | LOGO | Helmute:Crazy Frog | G*** |
| 1 | MCP1700x-180xxTT | Package_TO_SOT_SMD:SOT-23 | U5 |
| 1 | SGTL5000XNLA3 | Package_DFN_QFN:QFN-20-1EP_3x3mm_P0.4mm_EP1.65x1.65mm | U6 |
| 1 | SW_SPST | Button_Switch_THT:SW_Slide_SPDT_Angled_CK_OS102011MA1Q | SW1 |
| 1 | Speaker | Helmute:SpeakerConnections | LS1 |
| 1 | Teensy4.1 | Teensy:Teensy41 | U1 |
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Questions
How big is the Helmute PCBs PCB?
It measures 138.6 × 102 mm and has 2 copper layers, 1.6 mm thick.
What parts does the Helmute PCBs use?
59 parts, built around the TEENSY 4.1 and SGTL5000XNLA3. 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 Helmute PCBs KiCad files?
From the nmemmolo/Helmute repository on GitHub, at the commit this page was made from: the board is PCBs/Helmute_PCBs_revA/Helmute_PCBs.kicad_pcb and its schematic PCBs/Helmute_PCBs_revA/Helmute_PCBs.kicad_sch. PCBKit opens the board in the browser, with nothing to install.
Can I use the Helmute PCBs design in my own project?
Its repository states no licence, so its author keeps all rights: ask nmemmolo before reusing the design.