can we design a children tracker unit using RF signal without using a pc as a control unit?

Question

mostly, when a transmitter and receiver connected together, there must be a pc that act as a control unit.but can i design a transceiver without using pc as a control unit?how should i design that kind of circuit?

Answer 1

"mostly, when a transmitter and receiver connected together, there must be a pc that act as a control unit"

Who on earth told you that? Or did you dream it?

We had transmitters and receivers and tracking devices long before main frame computers were invented, never mind the p.c.

Answer 2

Sure. A walkie talkie or a common radio are both examples is an RF receiver without a PC. The circuit is going to be fairly complex though if you do not have much circuit design experience. The best bet would be to start with the schematic of a radio and work from there.

Answer 3

There is still going to have to be some kind of control function whether it is contained in a microcontroller, or 'hard' logic.

An FPGA (field programmable gate array) would be a good choice if you are dead-set against using a microcontroller, but you still have to "program" the FPGA. Instead of C language or assembly code, you'd write Verilog or VHDL, so there isn't much tradeoff between a microcontroller and an FPGA.

The controller could also be built using discrete logic, but that would take many chips, lots of space, and lots of power compared to the other 2 choices.

There are very small microcontrollers available (small packages, just the right amount of functionality for your application). There are also microcontrollers available that have built-in BASIC language interpreters, if you don't want to mess with C or assembly.

If it's the coding you are concerned with, go get a BASIC-Stamp kit (less than US$100) and you'd be suprised how easy it is to program a microcontroller.
http://www.parallax.com/


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Answer 4

How small do you want it to be?

You could use some sort of GPS device (civilian version is open to the public) and transmit the co-ordinates to a some type of hand held receiver. You could just transmit raw co-ordinates if you knew how to get to those co-ordinates from where you are. You could (with minimum processing) have the receiver be GPS based also, and use the difference in co-ordinates to detmine a vector to the source.

Even in the simplest form this wont be the easiest thing to do.

Other questions:

Does the receiver need to move or can it be stationary (like in your house)?

How long does it need to work? An afternoon, a day, a week. You need this for power considerations

Answer 5

i might advise you not attempt this this manner of project, yet revert to greater classic approaches that are much less reliant upon technologies to maintain that baby secure and whereabouts widely used in any respect cases. There are in simple terms too many stuff which could circulate incorrect, exceptionally with a house-brew answer.