MobileRead Forums - View Single Post - Aura H2O Aura H2O (1st gen.) screen repair howto

hatteras · 06-14-2019, 06:27 AM

@Markismus good for you !

Sorry, didn't have any info on the ir diodes. I managed to see them glow under the camera of my phone back when I was still trying to confirm that the touch screen actually uses infrared light, if that is of any help.

I found this post on 840nm vs. 940nm https://www.eevblog.com/forum/projec...gth-of-ir-led/ :
"840nm and 940nm are common wavelength values used for IR remote controls. It is easy to differentiate between both, because you can see 840nm slightly glowing in the dark, but 940nm is virtually invisible.
You can verify the LED is active by using a digital camera: The LED should be visible as a white or purple spot."
Same here : https://ellipsesecurity.com/2018/05/...r-illuminator/

But I did not actually build a test circuit to try that out. You were using older, larger leds for your repair ? Did I get that right ? Took a picture by any chance ?

06-14-2019, 06:27 AM	#5
hatteras Junior Member Posts: 4 Karma: 590 Join Date: May 2019 Device: Pocketbook Touch Lux 3	@Markismus good for you ! Sorry, didn't have any info on the ir diodes. I managed to see them glow under the camera of my phone back when I was still trying to confirm that the touch screen actually uses infrared light, if that is of any help. I found this post on 840nm vs. 940nm https://www.eevblog.com/forum/projec...gth-of-ir-led/ : "840nm and 940nm are common wavelength values used for IR remote controls. It is easy to differentiate between both, because you can see 840nm slightly glowing in the dark, but 940nm is virtually invisible. You can verify the LED is active by using a digital camera: The LED should be visible as a white or purple spot." Same here : https://ellipsesecurity.com/2018/05/...r-illuminator/ But I did not actually build a test circuit to try that out. You were using older, larger leds for your repair ? Did I get that right ? Took a picture by any chance ?