rx tx 433
P.S. low power 100 m. will be more than enough
Thank's for the help
I used the CC1000 from Chipcon. Take a look at www.Chipcon.com. Price for 1 piece is ~15USD
I use the great thick film modules of Italian Telecontrolli, very cheap. 6USS per module.
look here: www.telecontrolli.com
you can build a simple AM transmitter using one bjt (infineon BFP 420 or similar). You need a ceramic resonator (433.92 Mhz) and a couple of capacitors. The oscillator design is based on a negative resistance colpitts topology.
I do have a layout if you are interested. You may find it hard to find a ceramic resonator, the BJT will be easy to get hold of.
If you are 100 percent serious on making your own i may consider sending you some parts.
As for the receiver. The easiest solution (apart from buying a ready built one) is to use the micrel quick radio parts. You only need a couple of parts top get these babies working.
Range should exceed 100m easy. I can help you design a very sensitive (around -125dbm on an AM system) receiver but only if you are stuck.
Try rf solutions web site for some good application notes.
Else a good book is "short range wireless communications" by alan bensky.
This gives a very good start i designing and understanding these type of systems.
hope this helps
Regards
Bagster
What kind of compiler you use for cc1000, example picbasic pro or
some c compiler. If you use picbasic pro can you send to me your source code because i have problem with my.
Thanks
CC1000 is a nice chip: low power consumption, wide lock area etc. But even simpler might be NordicVLSI nrf433-series tranceivers. CC1000 is kind of a complex device requires a lot of register manipulation. nrf433 is an opposite and very straightforward. Please check their site w**.nvlsi.c*m
Pay attention to wireless transmission coding.
Processor selection is important if your transmission speeds are to be something like 19k2 bps. Pic (@20MHz) might to just fine with properly written c-code but I doubt some basic-compiler can cope with that,
Low level routines might need assembler anyway.
Regards,
dx_radio
This is one circuit.
http://www.spelektroniikka.fi/kytkis1.htm#saw
http://www.spelektroniikka.fi/kytkis1.htm#ovi
Hi,
Look this hxxp://www.rentron.com/remote_control/TXLC-434.htm
Well, i think cc1000 is the best, you need just one good component, the 82K resistor.
As all settings are made by software, its a piece of cake to reprogram.
Interface is also very straight forward
any stuff will talk to it.
Its broad band and at maximum power uses ony 27mA
trouble is only delivery time. but price is fine US4.6 FOB
All software on their site also
Yes, I agree, CC1000 is _very_ nice chip. I was in impression that the person who asked about it in the first place was kind of a newbie in sw development and therefore nrf433 for example is easier way to make it done. It has no sw-selectable pout adjustment and so on but it is very simple to use. Availability is not known to me.
I have designed one application to be used in europe and in usa (same application with sw-selected frequency) and cc1000 was an obvious choice over various candidates.
Regards,
dx_radio
see at www.cxe.hu
www.aurel.it
zoo: do you know what is the price of this RMCx radio module ?
1-9 pcs 34.80 EURO/pcs
10-100 29.90 EURO/pcs
plus p&p
When order, please let me know, the exact frequency you want,
amd the model, 433 or 866 or 915
Zoo
try using rfpic series from microchip
try www.melexis
and part #7120 they are great!
Visit http://www.lprs.co.uk
Else a good book is "short range wireless communications" by alan bensky.
This gives a very good start i designing and understanding these type of systems.
hi all,
where can I find this book? I want to realize a complete transceiver using discrete components for wireless communications into my home
tnx in advance.