2 layers142.5 × 106.4 mm
2 layers98 × 51 mm
Binary adder
SwiftDust/binary-adder1A binary adder PCB utilising the 555 and CD4060.
- Size
- 98 × 51 mm
- Copper layers
- 2
- Thickness
- 1.6 mm
- Parts
- 34
- Nets
- 32
- Pads
- 92
- Tracks, vias
- 216, 1
- Pours
- 1
- Routed
- Yes
- KiCad
- KiCad 9.0 (file 20241229)
- Created
- 4 Apr 2026
- Updated
- 28 Jun 2026
Overview
Binary adder is an open-source printed circuit board by SwiftDust, from the SwiftDust/binary-adder repository on GitHub. It is a 2-layer board of 98 × 51 mm with 34 parts on 32 nets, routed with 216 tracks and 1 via.
Its parts include 16 resistors, 12 diodes, 2 ICs, 2 switches and 1 capacitor.
README
README.mdBinary adder in an Airbus Beluga-shaped PCB
This is a simple binary adder in the form of an Airbus Beluga. It is a simple project for me to learn how to use ICs. This is for Resolution Week 3 but a new rule states you can't use monorepos so that's why I made this separate repository.
I used the well-known 555 and CD4060 to make this PCB. I used the 555 in monostable mode with a time constant of 0.125 seconds. This is derived by the fact that the average person would click on a button no more than eight times in a second, so a time constant of 0.125 or lower is required. If we make the time constant too low, it may not be fed correctly into the 4060, so that is why I chose this value. The input of the 555 is wired to a button. The CLK input of the 4060 is then wired up with the output of the 555 and all the outputs are wired to LEDs. If the output of the 555 is high, the binary adder will add one number to the output. Additionally, I have added a "Reset" button wired to the RST input of the 4060, so people can reset the counter. I made this PCB for fun, but can be useful to learn to count in binary too!
Schematic
PCB design
Parts
34| Qty | Value | Footprint | References |
|---|---|---|---|
| 12 | 5k | Resistor_THT:R_Axial_DIN0204_L3.6mm_D1.6mm_P7.62mm_Horizontal | R3, R4, R5, R6, R7, R8, R9, R10, R11, R12, R13, R14 |
| 12 | LED | LED_THT:LED_D5.0mm | D1, D2, D3, D4, D5, D6, D7, D8, D9, D10, D11, D12 |
| 4 | 10k | Resistor_THT:R_Axial_DIN0204_L3.6mm_D1.6mm_P7.62mm_Horizontal | R1, R2, R15, R16 |
| 2 | SW_Push | Button_Switch_THT:SW_PUSH_6mm | SW1, SW2 |
| 1 | 12.5u | Capacitor_THT:C_Disc_D5.0mm_W2.5mm_P5.00mm | C1 |
| 1 | 4040 | Package_DIP:DIP-16_W7.62mm | U1 |
| 1 | Conn_01x02 | Connector_PinHeader_2.54mm:PinHeader_1x02_P2.54mm_Vertical | J1 |
| 1 | LM555xN | Package_DIP:DIP-8_W7.62mm | U2 |
Questions
How big is the Binary adder PCB?
It measures 98 × 51 mm and has 2 copper layers, 1.6 mm thick.
What parts does the Binary adder use?
34 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 Binary adder KiCad files?
From the SwiftDust/binary-adder repository on GitHub, at the commit this page was made from: the board is Schematics/binary_adder.kicad_pcb and its schematic Schematics/binary_adder.kicad_sch. PCBKit opens the board in the browser, with nothing to install.
Can I use the Binary adder design in my own project?
Its repository states no licence, so its author keeps all rights: ask SwiftDust before reusing the design.
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