Posted on 12/28/2021 1:09:32 PM PST by yesthatjallen
Sure, a speaker can serve as a microphone, but only if the electronics is made to use it that way. Such is not the case for my TV. Not only that, is not capable of sending data upstream either. It must be used with a media source since it does not contain one. (It is not a recent model.)
I wouldn’t state this as an absolute. I’d say that such a set is less likely to ‘listen’, but it can be done. A conventional ‘loudspeaker’ - the device historically used to play audio in televisions, radios, cassette players, etc. - can also be used as an input device, aka a microphone. This may also be the case with newer audio transducer types, but I’m only talking about speakers.
For this to work efficiently, it would require the set to be designed, or modified, to function in a bidirectional mode.
Never say never! 😉
You could’ve just asked Alexa, ya know… 😉😁
My TV does not have uplink capability.
👍
I’ll give you the benefit of the doubt that you know this to be true. I won’t make the same claim, though I don’t think mine is designed to do that either. It does, however, connect to the internet for firmware and ‘smart app’ updates, so there is two-way communication built-in. Because of that, it could be used for nefarious purposes.
It’s a risk that I acknowledge, but don’t necessarily live in fear of.
I’m sure. My TV does not connect to the Internet. It could connect to a cable TV provider, but I don’t subscribe to one.
“I find FR bickering annoying. (Unless I am one of the parties to it.)”
Does that make you an honest hypocrite?
I couldn’t even begin to know where to look in a TV of today.
Howard Sams taught me everything I know about tv circuitry.
I do know that unless one is able to decode the fantastically small circuits in a IC chip, there is no way to know just WHAT the thing is ‘capable’ of doing.
It has an antenna. A BURST of info being transmitted from it would never be noticed at all by those sitting in front of it. heck, the early closed caption wording was encoded in the non-visable portion of the tv signal.
I learned electronics much the same way as you did before going to college. Then I had some formal training, but mostly software. In the workforce I learned a lot about digital hardware and some analog hardware. Now I design the electronics and write the software for it. My work is freelance. Most of the stuff I make is laboratory or medical instrumentation, and communicates in a variety of ways with a control center or data collection facility. I also work the PC end to do something with the data. My lab includes instrumentation that can detect, demodulate, and decode arbitrary signals. Detecting streaming audio anywhere in the RF bands is pretty easy.
Are you working on any cool projects? Play with Arduino? We could exchange ideas.
I often find good technical books at abebooks.com. The Monk book is there for about $5, while the Horowitz book stays expensive.
Only in my mind.
I've so many 'projects' in the pipeline that I end up doing none of them!
Way back when HBO was broadcast in the clear, a few of us conjured up a reciever that took the HF HBO signal and mixed it with a local oscillator so that the resulting IF was then in the 2-13 channel band.
HBO managed to sniff out these LOs by driving thru neighborhoods and plopping a Cease & Desist order on the guys that were using them.
I still have my first computer: http://www.retrotechnology.com/restore/6800D2.html
I cut my teeth on this thing. It had a whopping 256 BYTES of ram!
If you had the hindsight when you started you could have built your device in a tempest proof box.
You were pretty clever.
I help a gaggle of friends with their SWTP 6809 machines. I have designed many products using 6800, 6809, and 68HC11 processors. I liked them better than the Z80.
My first computer was an IBM 1130, which I was owned by the physics department at the university I attended. It was love at first sight. I used it quite a lot, and became quite proficient with it. I even attached devices to its storage access channel in order for it to run a linear accelerator and associated spectrometer. Years after I left the university they offered it to me for free; however, I didn't have anyplace to keep it at the time. Oh, how I wish I had that machine.
As my career developed I found myself working on PDP-8 and PDP-11/70 projects. Those took data from a supersonic wind tunnel. The PDP-11 is a fine machine. My experiences include applications around numerous mini-computers made by DEC, Data General, Computer Automation, and Perkin-Elmer, just to name a few. I actually used a surprising number of ancient microprocessors: 4004, 4040, 8008, 8080, 8086, 8088, 6800, 6809, 68HC11, and the amazing 68000. Of course the Z80 was everywhere. It would be nice to have those now, but I don't.
From time to time I get the urge to setup for making vacuum tubes. I have several tube-making books that were internal to RCA. Vacuum equipment isn't too expensive if you gather it from ebay.
It would be great to have you as a neighbor. Maybe we could even make some rockets.
Those computers on a shoe string were all pretty cool.
HBO was com-plaining about THEFT of their signal.
That would be like an armored car company complaining that folks were picking money off of the street the truck was driving on, with the doors wide open.
HBO was doing the equivalent of the Blues Brothers with the loudspeaker on the roof!
Played with small model rockets while stationed in Bangkok.
Disclaimer: Opinions posted on Free Republic are those of the individual posters and do not necessarily represent the opinion of Free Republic or its management. All materials posted herein are protected by copyright law and the exemption for fair use of copyrighted works.