Public Domain
The clock is regarding one of the oldest human inventions, where it’s meeting the need to measure the time in the natural units, such as second, minute, day, month and the year. However, if you want to measure the time accurately, you’ll need the help of some devices
| ID | Name | Designator | Footprint | Quantity |
|---|---|---|---|---|
| 1 | conector | U4,U5,U6,U7,U8,U9,U10,U11,U12,U13,U14,U15,U16,U17,U18,U19 | CONECTOR | 16 |
| 2 | 16F628AP | U1 | DIP18 | 1 |
| 3 | 4MHZ | X1 | HC-49S_L11.0-W4.6-P4.88 | 1 |
| 4 | 10MF/25V | C4,C5 | CAPACITOR 10MF/25V | 2 |
| 5 | 7805 | U2 | TO-220 | 1 |
| 6 | 220 | R1,R2,R3,R4,R5,R6,R7,R8 | PKG-0.25W RESISTOR | 8 |
| 7 | 10k | R9,R10,R17,R18,R19,R20 | PKG-0.25W RESISTOR | 6 |
| 8 | 4.7k | R11 | PKG-0.25W RESISTOR | 1 |
| 9 | 1k | R12,R13,R14,R15 | PKG-0.25W RESISTOR | 4 |
| 10 | 470 | R16,R21 | PKG-0.25W RESISTOR | 2 |
| 11 | BC172 | T1,T2,T3,T4 | TO_92_M | 4 |
| 12 | Power | U3 | POWER | 1 |
| 13 | 15pF | C1,C2,C3 | CAP-TH_L8.5-W5.0-P5.00-D1.2 | 3 |
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