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Quick interface question (TTL Voltage Levels)

 
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120240VAC60HZ



Joined: 17 Mar 2007
Posts: 183
Location: Trumbull, Connecticut
                    
PostPosted: Sat Sep 09, 2023 12:59 pm    Post subject: Quick interface question (TTL Voltage Levels) Reply with quote
I bought a new interface and it has several RX, TX, as well as VCC (which I know is not needed for the this application) voltage options it came configured for 3.3V but it also has 5V 2.5V 1.8V TTL level options, so which is the right one?

PS: I bought this version as I also dabble in router firmware replacement so this would also help with firmware recovery should I flash the wrong or a damaged file

Thanks
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The Robman
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Joined: 01 Aug 2003
Posts: 21238
Location: Chicago, IL
                    
PostPosted: Sat Sep 09, 2023 2:43 pm    Post subject: Reply with quote
I only see 1 of each on the 6 output pins, so I would assume you would use those.
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Rob
www.hifi-remote.com
Please don't PM me with remote questions, post them in the forums so all the experts can help!
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3FG
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Joined: 19 May 2009
Posts: 3367

                    
PostPosted: Sat Sep 09, 2023 2:57 pm    Post subject: Reply with quote
3.3V is safest. Most remotes use two 1.5V (nominal) battteries in series, so they provide close to 3.2V when new.
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