2 layers127 × 14 mm
Train set building light
dwilliams/pcb-things
A place to keep all of the PCB things that don't fit in a project
54 partsBSD-2-Clause
2 layers33.8 × 170 mm
Seq one step board
dwilliams/pcb-thingsA place to keep all of the PCB things that don't fit in a project
- Size
- 33.8 × 170 mm
- Copper layers
- 2
- Thickness
- 1.6 mm
- Parts
- 39
- Nets
- 40
- Pads
- 158
- Tracks, vias
- 357, 52
- Pours
- 2
- Routed
- Yes
- KiCad
- KiCad 6 (file 20211014)
- Created
- 9 Oct 2019
- Updated
- 20 Oct 2026
Overview
Seq one step board is an open-source printed circuit board by dwilliams, from the dwilliams/pcb-things repository on GitHub, published under the BSD-2-Clause licence. It is a 2-layer board of 33.8 × 170 mm with 39 parts on 40 nets, routed with 357 tracks and 52 vias.
It is built around the TL072. Its parts include 10 resistors, 8 diodes, 5 ICs, 4 capacitors and 4 connectors.
Main components
1README
README.mdpcb-things
A place to keep all of the PCB things that don't fit in a project
Parts
39| Qty | Value | Footprint | References |
|---|---|---|---|
| 4 | 100n | Capacitor_THT:C_Disc_D5.1mm_W3.2mm_P5.00mm | C1, C2, C3, C4 |
| 4 | 1N4148 | Diode_THT:D_DO-35_SOD27_P7.62mm_Horizontal | D2, D4, D7, D8 |
| 4 | 4023 | Package_DIP:DIP-14_W7.62mm_Socket_LongPads | U1, U2, U3, U4 |
| 4 | 470 | Resistor_THT:R_Axial_DIN0204_L3.6mm_D1.6mm_P7.62mm_Horizontal | R1, R2, R5, R6 |
| 4 | B100K | Potentiometer_THT:Potentiometer_Piher_T-16H_Single_Horizontal | RV1, RV2, RV3, RV4 |
| 4 | LED | LED_THT:LED_D3.0mm | D1, D3, D5, D6 |
| 2 | 100K | Resistor_THT:R_Axial_DIN0204_L3.6mm_D1.6mm_P7.62mm_Horizontal | R3, R8 |
| 2 | 1K | Resistor_THT:R_Axial_DIN0204_L3.6mm_D1.6mm_P7.62mm_Horizontal | R9, R10 |
| 2 | 1M | Resistor_THT:R_Axial_DIN0204_L3.6mm_D1.6mm_P7.62mm_Horizontal | R4, R7 |
| 2 | Conn_01x03 | Connector_PinHeader_2.54mm:PinHeader_1x03_P2.54mm_Vertical | J1, J3 |
| 2 | Conn_01x11 | Connector_PinHeader_2.54mm:PinHeader_1x11_P2.54mm_Vertical | J2, J4 |
| 2 | Q_NMOS_DSG | Package_TO_SOT_THT:TO-92_HandSolder | Q1, Q2 |
| 2 | SW_SPST | Connector_PinHeader_2.54mm:PinHeader_1x02_P2.54mm_Vertical | SW1, SW2 |
| 1 | TL072 | Package_DIP:DIP-8_W7.62mm_Socket_LongPads | U5 |
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Questions
How big is the Seq one step board PCB?
It measures 33.8 × 170 mm and has 2 copper layers, 1.6 mm thick.
What parts does the Seq one step board use?
39 parts, built around the TL072. 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 Seq one step board KiCad files?
From the dwilliams/pcb-things repository on GitHub, at the commit this page was made from: the board is tmp-seq-one/seq-one-step-board/seq-one-step-board.kicad_pcb. PCBKit opens the board in the browser, with nothing to install.
Can I use the Seq one step board design in my own project?
Its repository publishes it under the BSD-2-Clause licence: you may reuse it on that licence's terms (keep the author's notice, and for a copyleft licence share your changes alike).