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License: Public Domain
Mode: Editors' pick
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Update time：
2019-01-24 00:53:05
Creation time：
2018-09-20 00:36:36
Description
Circuit to detect a mailbox door opening and trigger a LED. The LED stays on even after the mailbox door is closed. A reset button is used to reset the circuit to ready state. ALDR(CCD) is used to detect light in the mailbox.
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| ID | Name | Designator | Footprint | Quantity | Mounted | |
|---|---|---|---|---|---|---|
| 1 | 2N3904 | Q1 | TO-92(TO-92-3) | 1 | Yes | C2092 |
| 2 | 22k | R1 | AXIAL-0.3 | 1 | Yes | |
| 3 | 1u | C1 | RAD-0.1 | 1 | Yes | |
| 4 | 120 | R2 | AXIAL-0.3 | 1 | Yes | |
| 5 | 5mm(If-20mA, Vf 3.0V) | LED1 | LED-3MM/2.54 | 1 | Yes | C99772 |
| 6 | 1M | R3 | AXIAL-0.3 | 1 | Yes | |
| 7 | 10k | R5 | AXIAL-0.3 | 1 | Yes | |
| 8 | EVQ22705R | SW1 | KEY-6.0*6.0-4 | 1 | Yes | C79156 |
| 9 | 0.1u | C2 | RAD-0.1 | 1 | Yes | |
| 10 | LDR | R6 | RESISTOR_LDR_10X8.5_RM7.6 | 1 | Yes | |
| 11 | CD4011BE | U1 | DIP-14 | 1 | Yes | C5226 |
| 12 | 5K(set 1.5K) | R4 | RES-ADJ_3386P | 1 | Yes | C125022 |
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