2 layers55 × 86 mm
LED Matrix Display Badge
0xlama/ATtiny_LED_Matrix_Display_Badge
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32 parts18MIT
2 layers90 × 115 mm
4-bitAdder
TwoSails/4-BitBinaryAdderAn electronics circuit to perform the basic addition of two 4-bit inputs designed on a PCB
- Size
- 90 × 115 mm
- Copper layers
- 2
- Thickness
- 1.6 mm
- Parts
- 46
- Nets
- 51
- Pads
- 159
- Tracks, vias
- 316, 15
- Pours
- 2
- Routed
- Yes
- KiCad
- KiCad 6 (file 20211014)
- Created
- 2 Jul 2022
- Updated
- 2 Jul 2022
Overview
4-bitAdder is an open-source printed circuit board by TwoSails, from the TwoSails/4-BitBinaryAdder repository on GitHub, published under the MIT licence. It is a 2-layer board of 90 × 115 mm with 46 parts on 51 nets, routed with 316 tracks and 15 vias.
It is built around the EG1218 and BS-7. Its parts include 25 resistors, 9 switches, 5 ICs and 5 diodes.
Main components
2README
README.md4-BitBinaryAdder
An electronics circuit to perform the basic addition of two 4-bit inputs designed on a PCB
The circuit was designed around the basic binary adder concept.
IC Components
Logical AND Gate: IC7408
Logical OR Gate: IC7432
Logical XOR Gate: IC7486
Logic Diagram
Circuit Diagram
Notes by the Creator
This design isn't fully optimal, in particular PCB traces are capable of optimisations. It was the first full circuit design and PCB design endeavoured by myself and hence useful as a bedrock for future developments and projects with lots to learn from.
Parts
46| Qty | Value | Footprint | References |
|---|---|---|---|
| 20 | 10k | Resistor_THT:R_Axial_DIN0207_L6.3mm_D2.5mm_P7.62mm_Horizontal | R1, R2, R3, R4, R5, R10, R11, R12, R13, R14, R15, R16, R17, R18, R19, R20 +4 |
| 9 | EG1218 | digikey-footprints:Switch_Slide_11.6x4mm_EG1218 | S1, S2, S3, S4, S5, S6, S7, S8, S9 |
| 5 | 100 | Resistor_THT:R_Axial_DIN0207_L6.3mm_D2.5mm_P7.62mm_Horizontal | R21, R22, R23, R24, R25 |
| 5 | LED | LED_THT:LED_D3.0mm | D1, D2, D3, D4, D5 |
| 2 | 7408-4 | 4-bitAdder:IC7408-4-PDIP | U3, U4 |
| 2 | 7486-4 | 4-bitAdder:IC7486-4-PDIP | U1, U2 |
| 1 | 7432-4 | 4-bitAdder:IC7432-4-PDIP | U5 |
| 1 | BS-7 | digikey-footprints:Battery_Holder_Coin_2032_BS-7 | BAT1 |
| 1 | LOGO | LOGO | G*** |
Questions
How big is the 4-bitAdder PCB?
It measures 90 × 115 mm and has 2 copper layers, 1.6 mm thick.
What parts does the 4-bitAdder use?
46 parts, built around the EG1218 and BS-7. 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 4-bitAdder KiCad files?
From the TwoSails/4-BitBinaryAdder repository on GitHub, at the commit this page was made from: the board is 4-bitAdder.kicad_pcb and its schematic 4-bitAdder.kicad_sch. PCBKit opens the board in the browser, with nothing to install.
Can I use the 4-bitAdder design in my own project?
Its repository publishes it under the MIT licence: you may reuse it on that licence's terms (keep the author's notice, and for a copyleft licence share your changes alike).
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