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2 layers60.1 × 26.8 mmBlackCloud OA308D mainboard, the printed circuit board in 3D

BlackCloud OA308D mainboard

dialup-bbs/OA308D

All Discrete LM308 Op-Amp

Full screenGitHub.kicad_pcb
Size
60.1 × 26.8 mm
Copper layers
2
Thickness
1.6 mm
Parts
61
Nets
40
Pads
152
Tracks, vias
347, 8
Routed
Yes
KiCad
KiCad 8.0 (file 20240108)
Created
20 Apr 2024
Updated
22 Apr 2024

Overview

BlackCloud OA308D mainboard is an open-source printed circuit board by dialup-bbs, from the dialup-bbs/OA308D repository on GitHub. It is a 2-layer board of 60.1 × 26.8 mm with 61 parts on 40 nets, routed with 347 tracks and 8 vias.

Its parts include 29 transistors, 15 resistors, 7 connectors and 2 diodes. It belongs with the computers and single-board computers boards of this library.

README

README.md

OA308D

All Discrete LM308 Op-Amp - The rare, classic and out of print LM308 Op-Amp using all discrete components.

Based on detailed schematic as presented in the Linear Technology datasheet. Transistor component reference numbers are the same.

This is an untested work in progress. Please do not build if you do not know what you are doing. Three prototype boards are currently under fabrication. Any corrections, feedback, comments or recommendations are highly encouraged.

This is also my second KiCad project and as a builder, I am completely unexperienced as a circuit drafter/designer.

This project is totally influenced by MostlyDIYrf/K7TFC's OA741D.

https://github.com/mostlydiyrf/OA741D

Parts

61
QtyValueFootprintReferences
172N3904Package_TO_SOT_THT:TO-92_InlineQ1, Q2, Q3, Q4, Q5, Q14, Q15, Q17, Q18, Q20, Q21, Q24, Q25, Q26, Q27, Q29 +1
92N3906Package_TO_SOT_THT:TO-92_InlineQ7, Q8, Q9, Q10, Q11, Q12, Q16, Q19, Q28
5Conn_01x01TestPoint:TestPoint_Pad_D1.0mmJ1, J2, J5, J6, J7
320kResistor_THT:R_Axial_DIN0207_L6.3mm_D2.5mm_P2.54mm_VerticalR2, R3, R9
32kResistor_THT:R_Axial_DIN0207_L6.3mm_D2.5mm_P2.54mm_VerticalR1, R4, R13
210kResistor_THT:R_Axial_DIN0207_L6.3mm_D2.5mm_P2.54mm_VerticalR5, R7
21N5711Diode_THT:D_DO-35_SOD27_P2.54mm_Vertical_AnodeUpD1, D2
11kResistor_THT:R_Axial_DIN0207_L6.3mm_D2.5mm_P2.54mm_VerticalR11
120kPotentiometer_THT:Potentiometer_Bourns_3386C_HorizontalTR4
1240ohmResistor_THT:R_Axial_DIN0207_L6.3mm_D2.5mm_P2.54mm_VerticalR14
15.6kResistor_THT:R_Axial_DIN0207_L6.3mm_D2.5mm_P2.54mm_VerticalR10
1500ohmResistor_THT:R_Axial_DIN0207_L6.3mm_D2.5mm_P2.54mm_VerticalR8
150kPotentiometer_THT:Potentiometer_Bourns_3386C_HorizontalTR1
16.4kResistor_THT:R_Axial_DIN0207_L6.3mm_D2.5mm_P2.54mm_VerticalR6
160kPotentiometer_THT:Potentiometer_Bourns_3386C_HorizontalTR2
1820ohmResistor_THT:R_Axial_DIN0207_L6.3mm_D2.5mm_P2.54mm_VerticalR12
190ohmResistor_THT:R_Axial_DIN0207_L6.3mm_D2.5mm_P2.54mm_VerticalR15
1940ohmPotentiometer_THT:Potentiometer_Bourns_3386C_HorizontalTR3
1Compensation 1TestPoint:TestPoint_Pad_D1.0mmJ3
1Compensation 8TestPoint:TestPoint_Pad_D1.0mmJ4
1NJFETPackage_TO_SOT_THT:TO-92_InlineQ23
1NPNPackage_TO_SOT_THT:TO-92_InlineQ13
1~Package_TO_SOT_THT:TO-92_InlineQ22

The 57 most common of 61 parts.

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Questions

How big is the BlackCloud OA308D mainboard PCB?

It measures 60.1 × 26.8 mm and has 2 copper layers, 1.6 mm thick.

What parts does the BlackCloud OA308D mainboard use?

61 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 BlackCloud OA308D mainboard KiCad files?

From the dialup-bbs/OA308D repository on GitHub, at the commit this page was made from: the board is BlackCloud-OA308D-mainboard.kicad_pcb and its schematic Black Cloud - OA308D.kicad_sch. PCBKit opens the board in the browser, with nothing to install.

Can I use the BlackCloud OA308D mainboard design in my own project?

Its repository states no licence, so its author keeps all rights: ask dialup-bbs before reusing the design.