2 layers33.9 × 12.3 mm
Track tuning tool example
AqueronteBlog/PCB_CAD
Examples/Libraries of PCB made for Altium and KidCAD
5 parts1
2 layers30 × 30 mm
Half adder
AqueronteBlog/PCB_CAD1Examples/Libraries of PCB made for Altium and KidCAD
- Size
- 30 × 30 mm
- Copper layers
- 2
- Thickness
- 1.6 mm
- Parts
- 13
- Nets
- 26
- Pads
- 51
- Tracks, vias
- 55, 12
- Pours
- 26
- Routed
- Yes
- KiCad
- KiCad 8.0 (file 20240108)
- Created
- 29 Aug 2017
- Updated
- 19 Oct 2025
Overview
Half adder is an open-source printed circuit board by AqueronteBlog, from the AqueronteBlog/PCB_CAD repository on GitHub. It is a 2-layer board of 30 × 30 mm with 13 parts on 26 nets, routed with 55 tracks and 12 vias.
It is built around the 74LS86. Its parts include 4 resistors, 2 capacitors, 2 ICs, 2 diodes and 1 connector.
Main components
1README
README.mdPCB_CAD
Examples/Libraries of PCB made for Altium and KidCAD
Parts
13| Qty | Value | Footprint | References |
|---|---|---|---|
| 2 | 100nF | Capacitor_SMD:C_0805_2012Metric | C1, C2 |
| 2 | 10k | Resistor_SMD:R_0805_2012Metric | R3, R4 |
| 2 | 470 | Resistor_SMD:R_0805_2012Metric | R1, R2 |
| 2 | LED | LED_SMD:LED_0805_2012Metric | D1, D2 |
| 1 | 74LS08 | Package_DIP:DIP-14_W7.62mm_Socket_LongPads | U2 |
| 1 | 74LS86 | Package_DIP:DIP-14_W7.62mm_Socket_LongPads | U1 |
| 1 | Conn_01x02 | Connector_PinHeader_2.54mm:PinHeader_1x02_P2.54mm_Horizontal | J1 |
| 1 | MountingHole | MountingHole:MountingHole_3.2mm_M3 | H1 |
| 1 | SW_DIP_x02 | Button_Switch_SMD:SW_DIP_SPSTx02_Slide_6.7x6.64mm_W6.73mm_P2.54mm_LowProfile_JPin | SW1 |
Questions
How big is the Half adder PCB?
It measures 30 × 30 mm and has 2 copper layers, 1.6 mm thick.
What parts does the Half adder use?
13 parts, built around the 74LS86. 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 Half adder KiCad files?
From the AqueronteBlog/PCB_CAD repository on GitHub, at the commit this page was made from: the board is KiCad/Projects/half_adder/half_adder.kicad_pcb and its schematic KiCad/Projects/differential_pair/track_tuning_tool_example.kicad_sch. PCBKit opens the board in the browser, with nothing to install.
Can I use the Half adder design in my own project?
Its repository states no licence, so its author keeps all rights: ask AqueronteBlog before reusing the design.
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