Digital clock
About the Digital clock PCB
Digital clock is an open source AVR/Arduino PCB design by Amaza-Ronald, published on GitHub. It is a 2-layer board measuring 209.2 × 96 mm, with 41 components from 18 distinct parts.
Its main chip is the ATMEGA328P-PU, from the AVR/Arduino family. Other key parts include the DS1302N+. By type, the board carries 17 resistors, 5 capacitors, 4 transistors, 2 ICs, 2 crystals and 2 switches.
Main components on the Digital clock
Digital clock bill of materials (BOM)
41 components, 18 distinct parts.
| Qty | Part | Footprint | Refs |
|---|---|---|---|
| 1 | ATMEGA328P-PU | DIP794W53P254L3467H457Q28N | IC1 |
| 1 | DS1302N+ DS1302+ | DIP762W56P254L938H457Q8N | U1 |
| 4 | S8550 | TO-92_Inline | Q1, Q2, Q3, Q4 |
| 1 | Crystal | Crystal_HC49-4H_Vertical | Y1 |
| 1 | AB38T-32.768KHZ | AB38T32768KHZ | Y2 |
| 1 | DC_IN | BarrelJack_Horizontal | J1 |
| 1 | BU2032SM-JJ-GTR | BAT_BU2032SM-JJ-GTR | BAT1 |
| 1 | BU2032SM-HD-G | BAT_BU2032SM-HD-G | BT1 |
| 4 | SA10-21SURKWA SA56-11GWA | DIP3040W75P254L2400H1050Q10N | DS1, DS2, DS3, DS4 |
| 1 | ABT-410-RC Buzz | ABT410RC | LS1 |
| 1 | NTCLE100E3103JB0 NTC | NTCLE100E3103JB0 | RT1 |
| 2 | FSMRA5JH04 FSMRA5JH | FSMRA5JH04 | S1, S2 |
| 4 | 22pF | C_Disc_D5.0mm_W2.5mm_P2.50mm | C1, C2, C3, C4 |
| 1 | 0.1uF | C_Disc_D5.0mm_W2.5mm_P2.50mm | C5 |
| 4 | 10K | R_Axial_DIN0207_L6.3mm_D2.5mm_P10.16mm_Horizontal | R1, R2, R16, R17 |
| 4 | 4.7K | R_Axial_DIN0207_L6.3mm_D2.5mm_P10.16mm_Horizontal | R3, R4, R5, R6 |
| 1 | LDR | R_LDR_10x8.5mm_P7.6mm_Vertical | R7 |
| 8 | 510 | R_Axial_DIN0207_L6.3mm_D2.5mm_P10.16mm_Horizontal | R8, R9, R10, R11, R12, R13, R14, R15 |
Digital clock design files
The KiCad project lives in the Amaza-Ronald/KiCAD-projects- repository on GitHub; these links point at the commit this page was built from.
Digital clock: common questions
What microcontroller does the Digital clock use?
The Digital clock is built around the ATMEGA328P-PU, from the AVR/Arduino family.
How big is the Digital clock PCB?
The Digital clock measures 209.2 × 96 mm, has 2 copper layers and is 1.6 mm thick.
How many components are on the Digital clock?
41 components, from 18 distinct parts. The full bill of materials is listed on this page.
Where can I download the Digital clock design files?
From the Amaza-Ronald/KiCAD-projects- repository on GitHub, which has the KiCad layout and the schematic; the links under Design files point to each one.
Can I use the Digital clock design in my own project?
The repository has no license, so all rights stay with Amaza-Ronald. Use it as a reference, and ask the author before reusing the design.
Can I test firmware for the Digital clock without the hardware?
Yes. HardLabs builds a simulation of the board from its netlist and BOM, so you can run and debug AVR/Arduino firmware against it before you order a PCB.
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