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STD Audio signal activated relay
Audio signal activated relay
License
Public Domain
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Update time：
2022-06-28 05:56:58
Creation time：
2022-06-26 06:54:35
Description
Description
The circuit allows the activation of the relay when it receives an audio signal, the activation is delayed by the value given to the capacitor C2, with a present value of 220uF it is about 90 seconds. The value can be increased with higher C2 values for example 330uF, 470uF.
Design Drawing
Design Drawing
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| ID | Name | Designator | Footprint | Quantity |
|---|---|---|---|---|
| 1 | 1u 25V | C1 | CAP-D6.3×F2.5 | 1 |
| 2 | 220u 25V | C2 | CAP-D8.0×F3.5 | 1 |
| 3 | 10u 25V | C3 | CAP-D8.0×F3.5 | 1 |
| 4 | 1N4148 | D1,D2 | DO-35_BD2.0-L4.2-P8.20-D0.5-RD | 2 |
| 5 | 1N4002 | D3 | DO-41_BD2.4-L4.7-P8.70-D0.9-RD | 1 |
| 6 | HDR-M-2.54_1x3 | IN-AUDIO,RELAY | HDR-M-2.54_1X3 | 2 |
| 7 | LED-TH-5mm_G | LED1 | LED-TH_BD5.0_GREEN | 1 |
| 8 | HDR-M-2.54_1x2 | PWR | HDR-M-2.54_1X2 | 1 |
| 9 | 2SC1815 TO-92 | Q1,Q3 | TO-92-3_L4.9-W3.7-P1.27-L | 2 |
| 10 | 2SA1015 TO-92 | Q2 | TO-92-3_L4.9-W3.7-P1.27-L | 1 |
| 11 | 22k | R1,R2 | R_AXIAL-0.4 | 2 |
| 12 | 33k | R3 | R_AXIAL-0.4 | 1 |
| 13 | 4k7 | R4 | R_AXIAL-0.4 | 1 |
| 14 | 470 | R5 | R_AXIAL-0.4 | 1 |
| 15 | SRD-05VDC-SL-C | RLY1 | RELAY-TH_SRD-XXVDC-XL-C | 1 |
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