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STD Doorbell
License: Public Domain
Mode: Editors' pick
- 0
Update time：
2018-10-15 12:23:23
Creation time：
2018-10-15 11:31:21
Description
Here is a simple and easy to build doorbell circuit using IC UM 66.The details of UM 66 is given in the older post “Melody Generator using UM 66″
Design Drawing
schematic diagram
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PCB
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| ID | Name | Designator | Footprint | Quantity | Mounted | |
|---|---|---|---|---|---|---|
| 1 | UM66 | U1 | TO-92(TO-92-3) | 1 | Yes | C171445 |
| 2 | BC548 | Q1 | TO-92(TO-92-3) | 1 | Yes | C36611 |
| 3 | BC548B | Q2 | TO-92(TO-92-3) | 1 | Yes | C36611 |
| 4 | 10K | R2 | RES-ADJ_3386P | 1 | Yes | C125022 |
| 5 | 100 | R1 | RES-ADJ_3386P | 1 | Yes | C125022 |
| 6 | 220u, 10V | C1 | CAP-D3.0XF1.5 | 1 | Yes | |
| 7 | EVQ22705R | SW1 | KEY-6.0*6.0-4 | 1 | Yes | C79156 |
| 8 | Header-Female-2.54_1x2 | P1 | HDR-1X2/2.54 | 1 | Yes | C49661 |
| 9 | SIN(0 1 50) AC 1 0 | V1 | HDR1X2 | 1 | Yes |
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