4 layers194.5 × 188.6 mm
MyCpu
fortinsylvain/MyCpu
Home brew CPU Hardware with 1-bit ALU implementation using 74LSxx, a micro-code and assembler coded in C#.
162 parts18MIT
2 layers203.2 × 101.6 mm
DigitalClock
CooperCollier/DigitalClockA 12-hour digital clock created in logisim
- Size
- 203.2 × 101.6 mm
- Copper layers
- 2
- Thickness
- 1.6 mm
- Parts
- 113
- Nets
- 258
- Pads
- 858
- Tracks, vias
- 2,301, 465
- Pours
- 2
- Routed
- Yes
- KiCad
- KiCad 6 (file 20211014)
- Created
- 28 Dec 2022
- Updated
- 5 Jan 2023
Overview
DigitalClock is an open-source printed circuit board by CooperCollier, from the CooperCollier/DigitalClock repository on GitHub. It is a 2-layer board of 203.2 × 101.6 mm with 113 parts on 258 nets, routed with 2,301 tracks and 465 vias.
It is built around the 74LS74PC, 74LS86 and 74LS32SC, with the HDSP-7801, 74LS04PC and LM1117-5.0 among its other parts. Its parts include 54 ICs, 43 resistors, 7 capacitors, 3 transistors and 3 switches. It belongs with the lEDs and displays boards of this library.
Main components
7
74LS74PC
DIP-140ns 0℃~+70℃ 1 2 20MHz 3.5pF 35ns@5V,50pF 4.5ns 4.75V~5.25V 400uA 74LS Series 8mA 8mA Asynchronous Complementary D-Type Rising Edge Set and Reset DIP-14 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 Gates
74LS32SC
-- Logic Gates ROHSTexas InstrumentsLogic Gates
HDSP-7801
插件0.3 1 105mW 12.7mmx7.62mmx6.09mm 7 Segment Common Anode Green 插件 LED Segment Displays ROHSBroadcom LimitedLED Segment Displays74LS04PC
PDIP-140℃~+70℃ 4.75V~5.25V 6 6.6mA 74LS PDIP-14 InvertersonsemiInverters
LM1117-5.0
SOT-2231 1.3V@(1000mA) 15V 1A 2mA 5V Fixed Over Current Protection、Short Circuit Protection、Thermal shutdown Positive SOT-223 Voltage Regulators - Linear, Low Drop Out (LDO) Regulators ROHShongjiachengUncategorised
NE555P
DIP-80℃~+70℃ 100kHz 10mA 4.5V~16V DIP-8 555 Timers / Counters ROHSTexas InstrumentsTimers / Counters
README
README.mdDigitalClock
A 12-hour digital clock made out of logic gates and flip-flops and implemented in Logisim.
This project incorporates the logisim 7-segment-display driver created here: https://github.com/marceloboeira/logisim-7-segment-display-driver.
How to open this project:
1: clone this repository with git clone https://github.com/CooperCollier/DigitalClock --recursive. The recursive tag is necessary to include the 7-segment-display driver.
2: Open the file clock.circ in logisim.
3: Under the 'simulate' tab, set 'tick frequency' to 2Hz.
4: Under the 'simulate' tab, set 'ticks enabled' to true.
How to use the clock:
Press the SET TIME button to make the clock enter or exit the SET TIME state. When the clock is in the SET TIME state, the SET TIME LED will be turned on. When the clock enters the SET TIME state, the time is immediately reset to 12:00 AM.
Press the +MIN and +HOUR buttons to change the displayed time. These buttons are only active when the clock is in the SET TIME state.
Parts
113| Qty | Value | Footprint | References |
|---|---|---|---|
| 33 | 1k | Resistor_THT:R_Axial_DIN0207_L6.3mm_D2.5mm_P10.16mm_Horizontal | R10, R11, R13, R14, R15, R16, R17, R18, R19, R20, R21, R22, R23, R24, R25, R26 +17 |
| 16 | 74LS08 | Package_DIP:DIP-14_W7.62mm | U4, U16, U20, U21, U25, U28, U29, U32, U33, U37, U42, U43, U47, U48, U51, U53 |
| 16 | 74LS74 | Package_DIP:DIP-14_W7.62mm | U9, U13, U17, U22, U23, U24, U26, U27, U31, U34, U35, U38, U40, U41, U45, U46 |
| 7 | 10k | Resistor_THT:R_Axial_DIN0207_L6.3mm_D2.5mm_P10.16mm_Horizontal | R1, R2, R3, R4, R5, R6, R12 |
| 6 | 74LS86 | Package_DIP:DIP-14_W7.62mm | U18, U19, U30, U36, U39, U44 |
| 4 | 74LS32 | Package_DIP:DIP-14_W7.62mm | U5, U49, U50, U52 |
| 4 | 74LS47 | Package_DIP:DIP-16_W7.62mm | U1, U6, U8, U12 |
| 4 | HDSP-7801 | Display_7Segment:7SegmentLED_LTS6760_LTS6780 | U3, U7, U10, U14 |
| 3 | 100nF | Capacitor_THT:C_Disc_D5.0mm_W2.5mm_P5.00mm | C2, C3, C4 |
| 3 | 10uF | Capacitor_THT:CP_Radial_Tantal_D5.0mm_P5.00mm | C5, C6, C7 |
| 3 | 2N3904 | Package_TO_SOT_THT:TO-92_Inline | Q1, Q2, Q3 |
| 3 | SW_Push | Button_Switch_THT:SW_PUSH_6mm | SW1, SW2, SW3 |
| 2 | 74LS04 | Package_DIP:DIP-14_W7.62mm | U15, U54 |
| 2 | LED | LED_THT:LED_D3.0mm | D1, D2 |
| 1 | 10nF | Capacitor_THT:C_Disc_D5.0mm_W2.5mm_P5.00mm | C1 |
| 1 | 4.2k | Resistor_THT:R_Axial_DIN0207_L6.3mm_D2.5mm_P10.16mm_Horizontal | R7 |
| 1 | 70 | Resistor_THT:R_Axial_DIN0207_L6.3mm_D2.5mm_P10.16mm_Horizontal | R8 |
| 1 | 70k | Resistor_THT:R_Axial_DIN0207_L6.3mm_D2.5mm_P10.16mm_Horizontal | R9 |
| 1 | Battery | TerminalBlock_Phoenix:TerminalBlock_Phoenix_MKDS-1,5-2_1x02_P5.00mm_Horizontal | J1 |
| 1 | LM1117-5.0 | Package_TO_SOT_THT:TO-220-3_Vertical | U11 |
| 1 | NE555P | Package_DIP:DIP-8_W7.62mm | U2 |
Questions
How big is the DigitalClock PCB?
It measures 203.2 × 101.6 mm and has 2 copper layers, 1.6 mm thick.
What parts does the DigitalClock use?
113 parts, built around the 74LS74PC, 74LS86, 74LS32SC and HDSP-7801. 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 DigitalClock KiCad files?
From the CooperCollier/DigitalClock repository on GitHub, at the commit this page was made from: the board is DigitalClock/DigitalClock.kicad_pcb and its schematic DigitalClock/DigitalClock.kicad_sch. PCBKit opens the board in the browser, with nothing to install.
Can I use the DigitalClock design in my own project?
Its repository states no licence, so its author keeps all rights: ask CooperCollier before reusing the design.
Similar boards
- 2 layers486 × 306.3 mm
- 2 layers630 × 300 mm
- 4 layers337.6 × 105.7 mm
ISA CGA
hkzlab/CGA_Redux
The Color Graphics Adapter Redux board is a more or less faithful clone of the original IBM CGA, based on the original schematics
170 parts56 - 2 layers236.8 × 169.8 mm
TK2000
clemarfolly/Microdigital-TK2000
Reprodução da PCB do TK-2000 da Microdigital, clone do Micro-Professor MPF-II
212 parts17 - 2 layers221.5 × 149.5 mm
ZX1
misterblack1/zenith_zt1
Information gathered on the Zenith ZT-1 / ZT-10 / ZT-11 and ZTX/ZT-x-A variants
140 parts5 - 2 layers244 × 244 mm
- 2 layers
Rogelio Pineda part 7-AMLDC-2044B
ForgottenMachines/Entrex
The technologies documented here will include all like-kind systems manufactured by Nixdorf, Redifon, ROCC & Mera, all originally designed by Entrex Inc, Burlington, MA USA.
332 parts1