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STD iPhone Remote Control
iPhone Remote Control
License
Public Domain
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Update time：
2021-10-17 21:05:09
Creation time：
2021-10-06 00:01:23
Description
Description
Simple iPhone media control button with backlight using audio jack.
I know what you're thinking, how can the iPhone audio jack power a backlight? Because the iPhone (& other smartphones) use a 4 pole audio jack ordinarily used for 2-way audio devices.
So the iPhone can power a red LED (other LED's require too much voltage) across the mic/control pin & common ground.
This also explains why a load resistor is required for an external remote control button to work.
The 100n capacitor is used to stabilize the button input & backlight power.
Design Drawing
Design Drawing
schematic diagram
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| ID | Name | Designator | Footprint | Quantity |
|---|---|---|---|---|
| 1 | 100n | C1 | RAD-0.1 | 1 |
| 2 | HDR-F-2.54_1x2 | H1 | HDR-F-2.54_1X2 | 1 |
| 3 | K4-6×6_TH | KEY1 | KEY-TH_4P-L6.0-W6.0-P4.50-LS6.5 | 1 |
| 4 | LED-TH-3mm_R | LED1 | LED-TH_BD3.0_RED | 1 |
| 5 | 10k | R1 | R_AXIAL-0.3 | 1 |
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