DigitalClock
About the DigitalClock PCB
DigitalClock is an open source PCB design by CooperCollier, published on GitHub. It is a 2-layer board measuring 203.2 × 101.6 mm, with 113 components from 21 distinct parts.
Other key parts include the 74LS47, NE555P, HDSP-7801, 74LS08 and 74LS32. By type, the board carries 54 ICs, 43 resistors, 7 capacitors, 3 transistors, 3 switches and 2 diodes.
From the project
A 12-hour digital clock created in logisim
This project incorporates the logisim 7-segment-display driver created here: https://github.com/marceloboeira/logisim-7-segment-display-driver.
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.
3: Under the 'simulate' tab, set 'tick frequency' to 2Hz.
Main components on the DigitalClock
DigitalClock bill of materials (BOM)
113 components, 21 distinct parts.
| Qty | Part | Footprint | Refs |
|---|---|---|---|
| 4 | 74LS47 | DIP-16_W7.62mm | U1, U6, U8, U12 |
| 1 | NE555P | DIP-8_W7.62mm | U2 |
| 4 | HDSP-7801 | 7SegmentLED_LTS6760_LTS6780 | U3, U7, U10, U14 |
| 16 | 74LS08 | DIP-14_W7.62mm | U4, U16, U20, U21, U25, U28, U29, U32 +8 |
| 4 | 74LS32 | DIP-14_W7.62mm | U5, U49, U50, U52 |
| 16 | 74LS74 | DIP-14_W7.62mm | U9, U13, U17, U22, U23, U24, U26, U27 +8 |
| 1 | LM1117-5.0 | TO-220-3_Vertical | U11 |
| 2 | 74LS04 | DIP-14_W7.62mm | U15, U54 |
| 6 | 74LS86 | DIP-14_W7.62mm | U18, U19, U30, U36, U39, U44 |
| 3 | 2N3904 | TO-92_Inline | Q1, Q2, Q3 |
| 1 | Battery | TerminalBlock_Phoenix_MKDS-1,5-2_1x02_P5.00mm_Horizontal | J1 |
| 3 | SW_Push | SW_PUSH_6mm | SW1, SW2, SW3 |
| 2 | LED | LED_D3.0mm | D1, D2 |
| 1 | 10nF | C_Disc_D5.0mm_W2.5mm_P5.00mm | C1 |
| 3 | 100nF | C_Disc_D5.0mm_W2.5mm_P5.00mm | C2, C3, C4 |
| 3 | 10uF | CP_Radial_Tantal_D5.0mm_P5.00mm | C5, C6, C7 |
| 7 | 10k | R_Axial_DIN0207_L6.3mm_D2.5mm_P10.16mm_Horizontal | R1, R2, R3, R4, R5, R6, R12 |
| 1 | 4.2k | R_Axial_DIN0207_L6.3mm_D2.5mm_P10.16mm_Horizontal | R7 |
| 1 | 70 | R_Axial_DIN0207_L6.3mm_D2.5mm_P10.16mm_Horizontal | R8 |
| 1 | 70k | R_Axial_DIN0207_L6.3mm_D2.5mm_P10.16mm_Horizontal | R9 |
Show 1 more
| Qty | Part | Footprint | Refs |
|---|---|---|---|
| 33 | 1k | R_Axial_DIN0207_L6.3mm_D2.5mm_P10.16mm_Horizontal | R10, R11, R13, R14, R15, R16, R17, R18 +25 |
DigitalClock design files
The KiCad project lives in the CooperCollier/DigitalClock repository on GitHub; these links point at the commit this page was built from.
DigitalClock: common questions
How big is the DigitalClock PCB?
The DigitalClock measures 203.2 × 101.6 mm, has 2 copper layers and is 1.6 mm thick.
How many components are on the DigitalClock?
113 components, from 21 distinct parts. The full bill of materials is listed on this page.
Where can I download the DigitalClock design files?
From the CooperCollier/DigitalClock repository on GitHub, which has the KiCad layout and the schematic; the links under Design files point to each one.
Can I use the DigitalClock design in my own project?
The repository has no license, so all rights stay with CooperCollier. Use it as a reference, and ask the author before reusing the design.