2 layers99.1 × 99.1 mm
2 layers99.1 × 99.1 mm
Increment register
ksmonkey123/8bit_computer1custom 8bit microprocessor project
- Size
- 99.1 × 99.1 mm
- Copper layers
- 2
- Thickness
- 1.6 mm
- Parts
- 34
- Nets
- 128
- Pads
- 370
- Tracks, vias
- 1,104, 69
- Pours
- 3
- Routed
- Yes
- KiCad
- KiCad 9.0 (file 20241229)
- Created
- 10 Dec 2024
- Updated
- 9 Sep 2026
Overview
Increment register is an open-source printed circuit board by ksmonkey123, from the ksmonkey123/8bit_computer repository on GitHub, published under the MIT licence. It is a 2-layer board of 99.1 × 99.1 mm with 34 parts on 128 nets, routed with 1,104 tracks and 69 vias.
It is built around the 74HC244D and 74HC273D. Its parts include 15 ICs, 6 capacitors, 4 resistors and 2 connectors.
Main components
2
74HC244D
SO-20-300mil-40℃~+125℃ 160uA 2 2V~6V 4 6mA 6mA 74HC 9ns@5V,15pF Tri-State Unidirectional SOIC-20-300mil Buffers, Drivers, Receivers, Transceivers ROHSNexperiaBuffers, Drivers, Receivers, Transceivers74HC273D
SOIC-20-300mil-40℃~+125℃ 1 12ns 15ns@4.5V,50pF 2V~6V 3.5pF 30MHz 3ns 74HC Series 8 8uA D-Type Reset Rising Edge SO-20-300mil Flip Flops ROHSNexperiaFlip Flops
Parts
34| Qty | Value | Footprint | References |
|---|---|---|---|
| 5 | C | Capacitor_SMD:C_0603_1608Metric | C2, C3, C4, C5, C6 |
| 4 | 100k | Resistor_SMD:R_0603_1608Metric | R1, R2, R3, R4 |
| 4 | 74HC273 | Package_DIP:DIP-20_W7.62mm_LongPads | U1, U2, U14, U15 |
| 4 | 74LS283 | Package_DIP:DIP-16_W7.62mm_LongPads | U5, U6, U7, U8 |
| 4 | MountingHole_Pad | MountingHole:MountingHole_3.2mm_M3_Pad_Via | H1, H2, H3, H4 |
| 3 | 4070 | Package_DIP:DIP-14_W7.62mm_LongPads | U11, U12, U13 |
| 3 | Conn_01x16 | Connector_IDC:IDC-Header_2x08_P2.54mm_Horizontal | ADDRESS_BUS1, CTRL_BUS1, DATA_BUS1 |
| 2 | 4081 | Package_DIP:DIP-14_W7.62mm_LongPads | U9, U10 |
| 2 | 74HC244 | Package_DIP:DIP-20_W7.62mm_LongPads | U3, U4 |
| 1 | C_Polarized | Capacitor_SMD:CP_Elec_5x5.3 | C1 |
| 1 | Conn_01x10 | Connector_IDC:IDC-Header_2x05_P2.54mm_Horizontal | J1 |
| 1 | Screw_Terminal_01x02 | TerminalBlock_TE-Connectivity:TerminalBlock_TE_282834-2_1x02_P2.54mm_Horizontal | J3 |
Questions
How big is the Increment register PCB?
It measures 99.1 × 99.1 mm and has 2 copper layers, 1.6 mm thick.
What parts does the Increment register use?
34 parts, built around the 74HC244D and 74HC273D. 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 Increment register KiCad files?
From the ksmonkey123/8bit_computer repository on GitHub, at the commit this page was made from: the board is circuits/pc-03_increment_register/increment_register.kicad_pcb and its schematic circuits/pc-01_dual_8bit_register/dual_8bit_register.kicad_sch. PCBKit opens the board in the browser, with nothing to install.
Can I use the Increment register 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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