2 layers52.2 × 52.2 mm
Base
google/mozc-devices
Circuit diagrams and firmware source code for Gboard DIY keyboards
43 parts3kApache-2.0
2 layers50.8 × 41.9 mm
Discrete 741
mostlydiyrf/OA741D6- Size
- 50.8 × 41.9 mm
- Copper layers
- 2
- Thickness
- 1.6 mm
- Parts
- 43
- Nets
- 26
- Pads
- 95
- Tracks, vias
- 186, 4
- Routed
- Yes
- KiCad
- KiCad 6 (file 20211014)
- Created
- 10 Apr 2022
- Updated
- 10 Apr 2022
Overview
Discrete 741 is an open-source printed circuit board by mostlydiyrf, from the mostlydiyrf/OA741D repository on GitHub. It is a 2-layer board of 50.8 × 41.9 mm with 43 parts on 26 nets, routed with 186 tracks and 4 vias.
Its parts include 20 transistors, 11 resistors, 7 connectors, 2 diodes and 1 capacitor.
README
README.mdOA741D
Reference documents and Kicad (ver.6) design files.
Parts
43| Qty | Value | Footprint | References |
|---|---|---|---|
| 13 | 2N3904 | Package_TO_SOT_THT:TO-92L | Q1, Q2, Q5, Q6, Q7, Q10, Q11, Q14, Q15, Q16, Q17, Q18, Q22 |
| 7 | 2N3906 | Package_TO_SOT_THT:TO-92L | Q3, Q4, Q8, Q9, Q12, Q13, Q20 |
| 7 | Conn_01x01 | Connector_PinHeader_2.54mm:PinHeader_1x01_P2.54mm_Vertical | J1, J2, J3, J4, J5, J6, J7 |
| 2 | 1K | Resistor_THT:R_Axial_DIN0207_L6.3mm_D2.5mm_P5.08mm_Vertical | R1, R2 |
| 2 | 1N5711 | Diode_THT:D_DO-15_P5.08mm_Vertical_KathodeUp | D1, D2 |
| 2 | 50 | Resistor_THT:R_Axial_DIN0207_L6.3mm_D2.5mm_P5.08mm_Vertical | R10, R11 |
| 2 | 50K | Resistor_THT:R_Axial_DIN0207_L6.3mm_D2.5mm_P5.08mm_Vertical | R3, R12 |
| 1 | 25 | Resistor_THT:R_Axial_DIN0207_L6.3mm_D2.5mm_P5.08mm_Vertical | R9 |
| 1 | 33 | K7TFC_Passives:Ceramic_Disk_Capacitor_P5.00mm | C1 |
| 1 | 39K | Resistor_THT:R_Axial_DIN0207_L6.3mm_D2.5mm_P5.08mm_Vertical | R5 |
| 1 | 4.5K | Resistor_THT:R_Axial_DIN0207_L6.3mm_D2.5mm_P5.08mm_Vertical | R7 |
| 1 | 5K | Resistor_THT:R_Axial_DIN0207_L6.3mm_D2.5mm_P5.08mm_Vertical | R4 |
| 1 | 7.5K | Resistor_THT:R_Axial_DIN0207_L6.3mm_D2.5mm_P5.08mm_Vertical | R8 |
| 1 | LOGO | Graphics:cc_by_4mm | G*** |
| 1 | LOGO | Graphics:cc_logo_4mm | G*** |
Questions
How big is the Discrete 741 PCB?
It measures 50.8 × 41.9 mm and has 2 copper layers, 1.6 mm thick.
What parts does the Discrete 741 use?
43 parts. 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 Discrete 741 KiCad files?
From the mostlydiyrf/OA741D repository on GitHub, at the commit this page was made from: the board is kicad6/Discrete_741.kicad_pcb and its schematic kicad6/Discrete_741.kicad_sch. PCBKit opens the board in the browser, with nothing to install.
Can I use the Discrete 741 design in my own project?
Its repository states no licence, so its author keeps all rights: ask mostlydiyrf before reusing the design.
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