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awesome. so i basically need to do the frequency voltage conversion to finish it up :)
and one more thing is that the output needs to stay fixed at the last position whenever there is no input (between stations). some sort of latch?
i just had one doubt with using the RF/micro system. isnt there an issue of sychronization between the reciever and transmitter? i mean if the transmitted code is '101' on a loop, how does the receiver find out the code from a string of 101101101....
and oh, btw initially we did plan to use a microcontroller and stuff, but scrapped it to make it easier.
https://www.electro-tech-online.com/threads/radio-triggered-linear-positioning-for-trains-fsk-8051.88228/
haha yea, its the 21st century, but we want to do a some basic circuit learning and do something useful while at it. like i said, the emphasis is on simplicity/cost and not on practical feasability.
it will be demonstrated in the lab, so noise/ station overlapping wont be a problem. we simply...
This is part of a small college project that im doing where i plan to make a simpsystem which will tell passengers inside a train what station is coming up next.
So heres how i thought it would work (the emphasis of the project is on simplicity)
Each station transmits different tone...
true, but then again. this wont be demonstrated in the open. its more of a lab project so licensing is not an issue. at the end of it, we want to learn a few things about radio fundamentals, buying a kit would deprive us of that.
i have read plenty of articles about people building their own...
and one more thing, im still not too clear about the fsk modulation part. would it require a custom fsk circuit, or can a fm transmitter circuit be modified to implement the fsk modulation?
i have only been able to find fm circuits in books and the net, but for fsk all i can find are block...
awesome bill, thanks a ton. im wondering if we can build the circuit ourselves, cause we are discouraged from buying kits (another reason for dumbing it down :P ) this actually seems perfect for actual usage with trains. but if we buy this kit, we really dont have much else to show as our own...
thanks bill. i read up on exbee and i understand that its similiar to bluetooth and can be used to build peer to peer networks. its seems like a waste of resource to go to that sophistication when all this requires is one way transmission of tiny data (3bits). so stuff like error control and...
i would have thought a simple fsk radio circuit will be simple to find, but doesnt seem like it :( are there any specific sites for such radio circuits?
Hi, im sort of lost trying to figure out how to implement my graduation project idea. the goal is to design a system that will give passengers inside trains the current location of the train and other details like next station, delay, ETA etc without using a gps. i figured i could take advantage...
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