Timeline for GPIO input shorted to ground or 3.3v
Current License: CC BY-SA 3.0
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| Apr 13, 2017 at 12:56 | history | edited | CommunityBot |
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| Sep 10, 2013 at 23:26 | comment | added | Milliways | If you want to use IR input, then a simple optical transistor is not sufficient. You would need more amplification and clipping. There are dedicated chips for this, but a USB IR sensor would be better. You would have to write code to decode the pulse train either way. | |
| Sep 10, 2013 at 17:29 | comment | added | BAReese | As for the optical transistor, I would like to be able to accept input from a TV remote. Like maybe to send a command to dim the lights when the TV power button is pressed on the remote, for example. I'm not sure how well this would relate to an opto-isolator as it seems those are used more to control another circuit while keeping the two segregated. Maybe I'm misunderstanding them though. | |
| Sep 10, 2013 at 17:26 | comment | added | BAReese | Thanks. I did see that discussion, but couldn't really tell from that whether it was safe to connect directly or if a resistor was necessary. It seems to me that it is possible to connect directly - though the added resistor is recommended for protection. | |
| Sep 10, 2013 at 5:53 | history | answered | Milliways | CC BY-SA 3.0 |