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STD Reflection Pwr Sensor - Raspi
License: CC-BY-SA 3.0
Mode: Editors' pick
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Update time：
2019-01-19 22:11:43
Creation time：
2019-01-11 04:13:34
Description
Reflection sensor using CNY70 with power led indication.
For power led indication, use in conjunction with Delay Timer connected to GPIO14 (https://easyeda.com/lynxlabeling/delaytimer).
Note: this circuit is connected to an N-channel Fet, which pulls GPIO3 pin low when activated. Add 'dtoverlay=gpio-shutdown' to /boot/config.txt file to use. For info, see:
- Add LED power indicator - https://howchoo.com/g/ytzjyzy4m2e/build-a-simple-raspberry-pi-led-power-status-indicator
- Power button tutorial - https://www.stderr.nl/Blog/Hardware/RaspberryPi/PowerButton.html
- And, see 'dtoverlay=gpio-shutdown' - https://github.com/raspberrypi/firmware/blob/master/boot/overlays/README
Design Drawing
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| ID | Name | Designator | Footprint | Quantity | BOM_Manufacturer Part | BOM_Supplier |
|---|---|---|---|---|---|---|
| 1 | CNY70 | SEN1 | LYNX_CNY70 | 1 | CNY70 | Digi-Key |
| 2 | 75R | R1 | LYNX_0805 | 1 | RC0805JR-0775RL | LCSC |
| 3 | 5k | R2,R3 | LYNX_0805 | 2 | RT0805BRD075K1L | LCSC |
| 4 | LTST-C230KGKT | LED1 | LYNX_LED-REV-1206 | 1 | LTST-C230KGKT | LCSC |
| 5 | JST_B4B-XH-A | H1 | B4B-XH-A | 1 | B4B-XH-A | Digi-Key |
| 6 | 2N7000K-7 | Q1 | LYNX_SOT-23(SOT-23-3) | 1 | 2N7002K-7 | LCSC |
| 7 | P-Ch FET | Q2 | SOT-23(SOT-23-3) | 1 | SI2301CDS-T1-GE3 | LCSC |
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