2 layers245.1 × 160 mm
8-Bit CPU 32k
slu4coder/Minimal-64x4-Home-Computer
My DIY TTL home computer with VGA and PS/2 and 4x the processing power of a Commodore C64 or Apple II.
139 parts326
2 layers97.8 × 92.7 mm
4-bit rca
emm312/4-bit-rca- Size
- 97.8 × 92.7 mm
- Copper layers
- 2
- Thickness
- 1.6 mm
- Parts
- 27
- Nets
- 37
- Pads
- 129
- Tracks, vias
- 370, 155
- Routed
- Yes
- KiCad
- KiCad 7 (file 20221018)
- Created
- 29 Dec 2023
- Updated
- 14 Jan 2024
Overview
4-bit rca is an open-source printed circuit board by emm312, from the emm312/4-bit-rca repository on GitHub. It is a 2-layer board of 97.8 × 92.7 mm with 27 parts on 37 nets, routed with 370 tracks and 155 vias.
It is built around the 74HC08D, 74HC86D and 74HC32D, with the L7805 among its other parts. Its parts include 13 resistors, 6 ICs, 5 diodes, 1 connector and 1 switch.
Main components
4
74HC08D
SOP-14-40℃~+125℃ 1.5V~4.2V 1.9V、3.7V、5.2V 100mV、400mV 2 27ns@4.5V,50pF 2V~6V 2uA 4 5.2mA 5.2mA 500mV~1.8V 74HC Series AND Gate SOIC-14 Logic Gates ROHSNexperiaLogic Gates74HC86D
SO-14-40℃~+125℃ 1.5V~4.2V 20ns@6V,50pF 2V~6V 2uA 4 5.2mA 5.2mA 500mV~1.8V 74HC Series XOR Gate SOIC-14 Logic Gates ROHSNexperiaLogic Gates74HC32D
SOP-14-40℃~+125℃ 1.5V~4.2V 1.9V、4.4V、5.9V 100mV、400mV、400mV 2 2V~6V 2uA 4 5.2mA 5.2mA 500mV~1.8V 6ns@6V,50pF 74HC Series OR Gate SOIC-14 Logic Gates ROHSNexperiaLogic Gates
L7805
TO-220ST0℃~+125℃@(Tj) 1 1.2A 20V 2V@(1A) 42uV 500uA 5V 73dB@(120Hz) Fixed Positive Short Circuit Protection TO-220ST Voltage Regulators - Linear, Low Drop Out (LDO) Regulators ROHSOSENVoltage Regulators - Linear, Low Drop Out (LDO) Regulators
Parts
27| Qty | Value | Footprint | References |
|---|---|---|---|
| 8 | 10k | Resistor_THT:R_Axial_DIN0207_L6.3mm_D2.5mm_P10.16mm_Horizontal | R5, R6, R7, R8, R9, R10, R11, R12 |
| 5 | 360 | Resistor_THT:R_Axial_DIN0207_L6.3mm_D2.5mm_P10.16mm_Horizontal | R1, R2, R3, R4, R13 |
| 5 | LED | LED_THT:LED_D5.0mm | D1, D2, D3, D4, D5 |
| 2 | 74HC08 | Package_DIP:DIP-14_W7.62mm_Socket_LongPads | U2, U4 |
| 2 | 74HC86 | Package_DIP:DIP-14_W7.62mm_Socket_LongPads | U1, U5 |
| 1 | 74HC32 | Package_DIP:DIP-14_W7.62mm_Socket_LongPads | U3 |
| 1 | 9V | Connector_PinHeader_2.54mm:PinHeader_1x02_P2.54mm_Vertical | BT1 |
| 1 | CIN & COUT | Connector_PinHeader_2.54mm:PinHeader_1x02_P2.54mm_Vertical | J1 |
| 1 | L7805 | Package_TO_SOT_THT:TO-220-3_Vertical | U6 |
| 1 | SW_DIP_x08 | Button_Switch_THT:SW_DIP_SPSTx08_Slide_6.7x21.88mm_W7.62mm_P2.54mm_LowProfile | SW1 |
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Questions
How big is the 4-bit rca PCB?
It measures 97.8 × 92.7 mm and has 2 copper layers, 1.6 mm thick.
What parts does the 4-bit rca use?
27 parts, built around the 74HC08D, 74HC86D, 74HC32D and L7805. 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-bit rca KiCad files?
From the emm312/4-bit-rca repository on GitHub, at the commit this page was made from: the board is 4-bit-rca.kicad_pcb and its schematic 4-bit-rca.kicad_sch. PCBKit opens the board in the browser, with nothing to install.
Can I use the 4-bit rca design in my own project?
Its repository states no licence, so its author keeps all rights: ask emm312 before reusing the design.