4 layers114.3 × 90.3 mm
Address register bank
lafehubert/electronics
A place for info and code relating to my electronics projects
99 parts
2 layers
Ya4b alu
lafehubert/electronicsA place for info and code relating to my electronics projects
- Copper layers
- 2
- Thickness
- 1.6 mm
- Parts
- 133
- Nets
- 190
- Pads
- 706
- Tracks, vias
- 0, 0
- Routed
- Not yet
- KiCad
- KiCad 5 (file 20171130)
- Created
- 19 Oct 2019
- Updated
- 8 Jan 2022
Overview
Ya4b alu is an open-source printed circuit board by lafehubert, from the lafehubert/electronics repository on GitHub. It is a 2-layer board with 133 parts on 190 nets.
It is built around the 74LS32SC, 74LS04PC and 74LS173SC, with the 74LS379PC, 74LS86 and 74LS157PC among its other parts. Its parts include 57 diodes, 28 capacitors, 28 ICs, 5 resistors and 1 connector.
Main components
7
74LS32SC
-- Logic Gates ROHSTexas InstrumentsLogic Gates
74LS04PC
PDIP-140℃~+70℃ 4.75V~5.25V 6 6.6mA 74LS PDIP-14 InvertersonsemiInverters74LS173SC
CDIP-160℃~+70℃ 10ns 10ns 28mA 30MHz 4 4.75V~5.25V 40ns@5V,15pF 74LS Series Asynchronous D-Type Reset Rising Edge Tri-State CDIP-16 Flip FlopsTexas InstrumentsFlip Flops
74LS379PC
PDIP-160℃~+70℃ 18mA 20ns 27ns@5V,15pF 30MHz 4 4 5V 5ns 74LS Series Complementary D-Type Enable Rising Edge PDIP-16 Flip FlopsTexas InstrumentsFlip Flops74LS86
DIP-14-20℃~+75℃ 10mA 2.7V 23ns@5V,15pF 2V 400mV 400uA 5V 74LS 800mV 8mA XOR Gate DIP-14 Logic Gates ROHSHITLogic Gates74LS157PC
PDIP-160℃~+70℃ 4.75V~5.25V Single Supply PDIP-16 Signal Switches, Multiplexers, Decoders ROHSTexas InstrumentsSignal Switches, Multiplexers, Decoders
74LS85DC
CDIP-16-55℃~+125℃ 10mA 24ns Four channels TTL CDIP-16 Comparators ROHSTexas InstrumentsComparators
README
ya4b/slow-clock/README.mdThis slow clock was initially inspired by Ben Eater's design (https://eater.net/8bit/clock) but I found the 555 to be too fiddly for the monostable stage, and overkill for the bistable stage, so I used a 74LS123 for the former and an R-S latch made from a couple of NANDs on a 74LS00 for the latter. I also replaced the 74LS04 with a 74LS14 which seemed to clean up the waveform a good bit.
Parts
133| Qty | Value | Footprint | References |
|---|---|---|---|
| 57 | LED | LED_THT:LED_Rectangular_W5.0mm_H2.0mm | D1, D2, D10, D11, D12, D13, D14, D15, D16, D17, D18, D19, D20, D21, D22, D23 +41 |
| 28 | 0.1µF | Capacitor_THT:C_Disc_D3.0mm_W1.6mm_P2.50mm | C1, C2, C10, C11, C12, C13, C14, C15, C16, C17, C18, C19, C20, C21, C22, C23 +12 |
| 13 | 470Ω | Resistor_THT:R_Array_SIP5 | RN1, RN2, RN3, RN4, RN5, RN6, RN8, RN9, RN10, RN11, RN12, RN13, RN14 |
| 7 | 74LS243 | Package_DIP:DIP-14_W7.62mm_Socket | U6, U7, U8, U9, U10, U11, U12 |
| 5 | 470Ω | Resistor_THT:R_Axial_DIN0207_L6.3mm_D2.5mm_P10.16mm_Horizontal | R1, R2, R3, R4, R5 |
| 5 | 74LS08 | Package_DIP:DIP-14_W7.62mm_Socket | U17, U18, U19, U20, U21 |
| 3 | 74LS32 | Package_DIP:DIP-14_W7.62mm_Socket | U22, U23, U28 |
| 2 | 74LS04 | Package_DIP:DIP-14_W7.62mm_Socket | U26, U27 |
| 2 | 74LS173 | Package_DIP:DIP-16_W7.62mm_Socket | U4, U5 |
| 2 | 74LS283 | Package_DIP:DIP-16_W7.62mm_Socket | U13, U14 |
| 2 | 74LS379 | Package_DIP:DIP-16_W7.62mm_Socket | U2, U3 |
| 2 | 74LS86 | Package_DIP:DIP-14_W7.62mm_Socket | U24, U25 |
| 1 | 10kΩ | Resistor_THT:R_Array_SIP5 | RN7 |
| 1 | 74LS154 | Package_DIP:DIP-24_W15.24mm_Socket | U1 |
| 1 | 74LS157 | Package_DIP:DIP-16_W7.62mm_Socket | U15 |
| 1 | 74LS85 | Package_DIP:DIP-16_W7.62mm_Socket | U16 |
| 1 | Conn_01x38 | Connector_PinHeader_2.54mm:PinHeader_1x38_P2.54mm_Vertical | J1 |
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Questions
What parts does the Ya4b alu use?
133 parts, built around the 74LS32SC, 74LS04PC, 74LS173SC and 74LS379PC. 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 Ya4b alu KiCad files?
From the lafehubert/electronics repository on GitHub, at the commit this page was made from: the board is ya4b/alu/designs/ttl/ya4b-alu/ya4b-alu.kicad_pcb. PCBKit opens the board in the browser, with nothing to install.
Can I use the Ya4b alu design in my own project?
Its repository states no licence, so its author keeps all rights: ask lafehubert before reusing the design.