2 layers98 × 38 mm
Bldc control ver3
pekkaroi/bldc-drive
Cheap and simple brushless DC motor driver designed for CNC applications using STM32 microcontroller
68 parts199GPL-2.0
4 layers116.5 × 80 mm
Breakout1
lowobservable/channel6IBM parallel channel adapter
- Size
- 116.5 × 80 mm
- Copper layers
- 4
- Thickness
- 1.6 mm
- Parts
- 109
- Nets
- 149
- Pads
- 587
- Tracks, vias
- 1,390, 231
- Pours
- 3
- Routed
- Yes
- KiCad
- KiCad 8.0 (file 20240108)
- Created
- 1 Jul 2024
- Updated
- 1 Sep 2025
Overview
Breakout1 is an open-source printed circuit board by lowobservable, from the lowobservable/channel repository on GitHub, published under the ISC licence. It is a 4-layer board of 116.5 × 80 mm with 109 parts on 149 nets, routed with 1,390 tracks and 231 vias.
It is built around the SN751730D and SN74LVC8T245PW. Its parts include 42 capacitors, 40 resistors, 15 ICs, 5 connectors and 1 diode.
Main components
2
SN751730D
SOIC-160℃~+70℃ 4.5Mbps 4.75V~5.25V 47mA、80mA Fail-safe SOIC-16 Interface - Specialized ROHSTexas InstrumentsInterface - Specialized
SN74LVC8T245PW
TSSOP-24-40℃~+85℃ 1 1.65V~5.5V 1.65V~5.5V 8 Bidirectional CMOS CMOS Tri-State TSSOP-24 Translators, Level Shifters ROHSTexas InstrumentsTranslators, Level Shifters
README
README.mdchannel
IBM parallel channel adapter.
Parts
109| Qty | Value | Footprint | References |
|---|---|---|---|
| 38 | 95 | Resistor_SMD:R_0805_2012Metric | R1, R2, R10, R11, R12, R13, R14, R15, R16, R17, R18, R19, R20, R21, R22, R23 +22 |
| 21 | 0.1 uF | Capacitor_SMD:C_0603_1608Metric | C2, C10, C12, C14, C16, C18, C20, C22, C24, C26, C28, C30, C32, C34, C36, C38 +5 |
| 19 | 1 uF | Capacitor_SMD:C_0603_1608Metric | C1, C3, C11, C13, C15, C17, C19, C21, C23, C25, C27, C29, C31, C33, C35, C37 +3 |
| 7 | SN751730 | Package_SO:SOIC-16_3.9x9.9mm_P1.27mm | U1, U2, U3, U4, U5, U6, U7 |
| 6 | SN74LVC8T245 | Package_SO:SOIC-24W_7.5x15.4mm_P1.27mm | U8, U9, U10, U11, U12, U13 |
| 2 | 10 uF | Capacitor_SMD:C_0603_1608Metric | C39, C41 |
| 2 | 10k | Resistor_SMD:R_0603_1608Metric | R34, R39 |
| 2 | Jumper_2_Bridged | Connector_PinHeader_2.54mm:PinHeader_1x02_P2.54mm_Vertical | JP1, JP2 |
| 2 | MountingHole_Pad | MountingHole:MountingHole_2.7mm_M2.5_ISO7380_Pad | H1, H2 |
| 1 | 750 mA | Fuse:Fuse_1206_3216Metric | F1 |
| 1 | Bus Out | Connector_JST:JST_PUD_S40B-PUDSS-1_2x20_P2.00mm_Horizontal | J1 |
| 1 | Conn_02x02_Odd_Even | Connector_PinHeader_2.54mm:PinHeader_2x02_P2.54mm_Vertical | J6 |
| 1 | Conn_02x28_Odd_Even | Connector_PinSocket_2.54mm:PinSocket_2x28_P2.54mm_Vertical | J3 |
| 1 | D_Schottky | Diode_SMD:D_1206_3216Metric | D1 |
| 1 | FerriteBead | Fuse:Fuse_1206_3216Metric | FB1 |
| 1 | Jack-DC | Connector_BarrelJack:BarrelJack_Horizontal | J4 |
| 1 | LD1117S33TR_SOT223 | Package_TO_SOT_SMD:SOT-223-3_TabPin2 | U15 |
| 1 | LD1117S50TR_SOT223 | Package_TO_SOT_SMD:SOT-223-3_TabPin2 | U14 |
| 1 | Tag Out | Connector_JST:JST_PUD_S40B-PUDSS-1_2x20_P2.00mm_Horizontal | J2 |
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Questions
How big is the Breakout1 PCB?
It measures 116.5 × 80 mm and has 4 copper layers, 1.6 mm thick.
What parts does the Breakout1 use?
109 parts, built around the SN751730D and SN74LVC8T245PW. 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 Breakout1 KiCad files?
From the lowobservable/channel repository on GitHub, at the commit this page was made from: the board is adapter1/pcb/breakout1.kicad_pcb and its schematic adapter1/pcb/breakout1.kicad_sch. PCBKit opens the board in the browser, with nothing to install.
Can I use the Breakout1 design in my own project?
Its repository publishes it under the ISC licence: you may reuse it on that licence's terms (keep the author's notice, and for a copyleft licence share your changes alike).