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STD DIY 3*7-segment diaplay Alarm Clock Schematic
License: Public Domain
Mode: Editors' pick
- 0
Update time：
2023-12-29 19:41:35
Creation time：
2020-02-26 10:12:09
Description
Alarm Clock pre-programmed package kit. schematic capable of setting and displaying time, sounding buzzer alarm or external speaker output (J3), external snooze-button (J4), DC input: >5V and
Design Drawing
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| ID | Name | Designator | Footprint | Quantity |
|---|---|---|---|---|
| 1 | OUT | J3 | HDR-TH_2P-P2.54-V-M | 1 |
| 2 | IN | J4 | HDR-TH_2P-P2.54-V-M | 1 |
| 3 | 1k | R14,R2,R1,R17,R15,R16,R13,R11,R12 | AXIAL-0.3 | 9 |
| 4 | 220R | R8,R7,R6,R5,R4,R10,R9 | AXIAL-0.3 | 7 |
| 5 | 10k | R3 | AXIAL-0.3 | 1 |
| 6 | 5.1k | R18 | AXIAL-0.3 | 1 |
| 7 | 10uF | C2,C3 | CAP-D3.0XF1.5 | 2 |
| 8 | Screw Terminal | DC2 | CONN-TH_2P-P5.00_WJ300V-5.00-2P | 1 |
| 9 | TS-1109-7 | S1,S3,S2 | SW4-6.2X6.2X5.0MM | 3 |
| 10 | AT89C2051 | U1 | DIP-20_L26.8-W6.4-P2.54-LS7.6-BL | 1 |
| 11 | LM78L05 | U2 | TO-92-3_L4.9-W3.7-P1.27-L | 1 |
| 12 | 204-10SURD/S530-A3 | LED3,LED1,LED2,LED4 | LED-3MM/2.54 | 4 |
| 13 | FJ3261AB | SMG1,SMG2,SMG3 | LED-SEG-TH_10P-L15.0-W14.0-P2.54-S10.16-BL | 3 |
| 14 | 5mm DC Jack | DC1 | DC-IN-TH_DC-005 | 1 |
| 15 | 8550SS | Q3,Q5,Q6,Q7,Q4,Q1,Q2 | TO-92-3_L4.9-W3.7-P1.27-L | 7 |
| 16 | 12MHz | Y1 | HC-49US_L11.5-W4.5-P4.88 | 1 |
| 17 | BUZZER | SG1 | BUZZER-12MM-KIT | 1 |
| 18 | 104 | C1,C4 | RAD-0.1 | 2 |
| 19 | 30pF | C5,C6 | RAD-0.1 | 2 |
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