Wireless Reciever aand Transmitter

[prodigyaj]

Hello Everyone,

I have a project in which I have a WIRED Robot which has to be made wireless.
For that purpose can anybody suggest me the receiver and the transmitter circuit ?
( Basically you can say that I want a toy car to be converted to a remote controlled one. )
As I am not a expertise in this field and this being a one time project for me I hope you will help out .

 

[khouly]

in which band u want , and what type od modulation , and what is th data rate

khouly

 

[prodigyaj]

i think i will want to work in the range of 30-40Khz ! i dint get what is meant by od modulation ?
however it would be helpful if u could suggest smthng better to me !

 

[prodigyaj]

i hope some one can come up with a answer

 

[melc]

I think the best choiche could be either a ZIGBEE transciever (ISM band 2.4GHz) because it's the simplest transciever at this frequency, or if you need something easiest than any RF transmitter + receiver module on 27-433MHz with software for serial encoder-decoder.

 

[prodigyaj]

@melc

but from where do i get the circuit diagram for the transmitter and the reciever ?

 

[f17]

hi, i hope you will find this site helpful:
http://www.rentron.com/ruf-bot.htm
it uses TWS-434 and RWS-434 rf module

 

[prodigyaj]

thank you buddy
but i do not want to use micro-controller ( like PIC 16F84 ) used in the link you had give me !!

I mean a simple reciever and transmitter is still possible with using a micro-controller right ? ?

 

[prodigyaj]

can anybody please come up with a solution ? ?

 

[prodigyaj]

hello please some body help me !!! its urgent !

 

[bes]

In order to reduce the cost , You maybe can visit below website to get more wireless modules. The designer can use this part as a drop-in subsystem component, and never has to care about things like impedance matching or soldering fine pitch devices.


2.4G WM2500S is sell 1.5USD for 5K QTY
433M/868M/915M WM4221 is only sell 1.1 USD for 5K QTY
433M/868M/915M WM4320 is only sell 1.2 USD for 5K QTY
Pls visit below websit for more.
**broken link removed**[/url]
we also provide the free software guide for different modules.

 

[mr_anderson]

i prefer the TWS-433 itz very easy to use and has many good facilities , i am using it on my project itz doing good till now though it has power limitaions ,

 

[padspcb]

Hi all

I think you really should go for ZigBee.
Everybody is now hopping in like Ember, STM, Atmel, even TI that bought chipcon....
But from my own expertise, you should stay out all those vaporwares....
I mean by ember, atmel, ti/chipcon, st and freescale......
You pay a lot, NDAs, volume requirementes, third party $tack ( Figure 8 )... not worth really.
And they never deliver the chips ( one year waiting for ember single chip ) or like freescale, lots of bugs in foundry and most require controller+radio chip.

Get EVERYTHING what you need form JENNIC www.jennic.com, a trully friendly and accessible company, that has already 4 years in expertise in this stuff.

A single TQFP package dual chip ( IBM foundry, si+sige ) with os in rom, 64k ram, full zb stack. 2 D/A, 6 A/D, 6 SPI, 2 RS, 2 Comparators, etc + etc....
Has hardware MAC and AES 128....
All you need to do is customize your application.
Get the JN513X Product brief and get awed!
www.jennic.com/products/download_brief.php

Minimum mount = CPU + Antenna + Serial EEPROM + ETC from U$8 and bellow on quantities.
Free GNU compiler and stack, you pay just for the chip
They sell also ready assembled modules that you may add to your board, but some U$22 each...
Get the demo kit, you will love it, easy to use and program, no clumsy JTags you just need an RS232.
Also comes with a network program that is really worth!

And remember, ZigBee is becomming the standard in industrial / home / fire / security control
Lots of stuff being manufactured by vendors....
You will soon find lots of control programs and interfaces for anything you need, e.g.: distributed audio for home theathers

Stay tunned!

Best

PadsPCB

 

[scw1980]

I am currently working on a CMOS transmitter project require to design a full quadrature upconverter, and with LO generator. Of course the driver amplifier. Here is the specification. If anyone can help.


Upconverter Driver Amp
Input Frequency 0 – 10 MHz 5 GHz
Output Frequency 5 GHz 5 GHz
Output noise at 100MHz
offset to carrier
-140 dBc -130 dBc
Baseband input level 100mVrms
Output signal level 100mVrms
Output power (50 W) 5 dBm
IM3 at output signal level ³-56 dBc ³-46 dBc
Upconverter tank load Whatever can be achieved with
Output impedance VSWR NA 50 W, 2:1, (-10 dB)
Supply voltage 2.5 V
Power consumption < 150 mW