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soddy
After that date they will stop broadcasting analog signals. I use the tv in a camper and have outside antenna. Will I need to buy a converter box?
Answer
What is the make & model number of the TV?
NTSC = analog tuner
ATSC = digital over the air tuner
"with Digital Tuning " doesn't say anything
If the portable TV is more than a year old, it's almost sure to need a converter box. If it cost less than $149 (new), it's almost sure that it needs a converter box.
If you are going to power it with an AC inverter, you could use any model of of converter (I recommend the Zenith/Insignia model). If you want a converter to run directly on a 12 volt battery, the Artec T3AP Pro is the model to look at.
What is the make & model number of the TV?
NTSC = analog tuner
ATSC = digital over the air tuner
"with Digital Tuning " doesn't say anything
If the portable TV is more than a year old, it's almost sure to need a converter box. If it cost less than $149 (new), it's almost sure that it needs a converter box.
If you are going to power it with an AC inverter, you could use any model of of converter (I recommend the Zenith/Insignia model). If you want a converter to run directly on a 12 volt battery, the Artec T3AP Pro is the model to look at.
How are radio signals transmitted?
Durim M
I want to build a simple rf remote control to simply turn on an LED from a distance, wirelessly. Of course I will do it in a permittable band (one that I don't need a license for). After that I will try to build a r/c car. I want to build it from scratch to get a in depth understanding of robotics.
Answer
If you have experience with electronics, one way of thinking about it is this: when you pass an oscillating current through a wire, it generates an electromagnetic field that propagates outward at the speed of light as radio waves. These waves will create a voltage of the same frequency (although much, much weaker) in another wire that is nearby.
The simplest way to transmit useful information by radio is to simply turn the transmitter on and off; this is how Morse code has been sent since the beginning of the 20th century. All the transmitter needs in this case is a switchable oscillator of the appropriate frequency. The receiver needs a sensitive amplifier and a band-pass filter accurately tuned to the same frequency as the transmitter. There are also more sophisticated encoding schemes, such as the ones used in technologies like TV, FM radio and WiFi.
For more information on the theory behind radio communications, you can check out books or websites on amateur radio. If you're just interested in getting something working, you can get integrated, pre-built transmitting and receiving devices -- try searching for RF receivers, transmitters or transceivers.
If you have experience with electronics, one way of thinking about it is this: when you pass an oscillating current through a wire, it generates an electromagnetic field that propagates outward at the speed of light as radio waves. These waves will create a voltage of the same frequency (although much, much weaker) in another wire that is nearby.
The simplest way to transmit useful information by radio is to simply turn the transmitter on and off; this is how Morse code has been sent since the beginning of the 20th century. All the transmitter needs in this case is a switchable oscillator of the appropriate frequency. The receiver needs a sensitive amplifier and a band-pass filter accurately tuned to the same frequency as the transmitter. There are also more sophisticated encoding schemes, such as the ones used in technologies like TV, FM radio and WiFi.
For more information on the theory behind radio communications, you can check out books or websites on amateur radio. If you're just interested in getting something working, you can get integrated, pre-built transmitting and receiving devices -- try searching for RF receivers, transmitters or transceivers.
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