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xxtigerxx
Joined: 05 Jun 2001
Posts: 208
Helped: 4
Location: Greece
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 31 Jan 2008 8:21 Looking for the cheapest method to commincate in 433MHz |
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hello
I am looking for a transmiter and a receiver in 433Mhz with a
cheap way.
I do not need hi speed.
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BlackOps
Joined: 02 Jan 2005
Posts: 254
Helped: 5
Location: AZERBAIJAN
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drewcam888
Joined: 21 Jan 2008
Posts: 12
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| 01 Feb 2008 16:22 Re: Looking for the cheapest method to commincate in 433MHz |
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| I used one of there products and wasn't very pleased. It didn't to perform as well as expected.
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FvM
Joined: 22 Jan 2008
Posts: 1837
Helped: 335
Location: Bochum, Germany
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| 01 Feb 2008 16:30 Re: Looking for the cheapest method to commincate in 433MHz |
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Probably not cheapest, but good performance, based on Chipcon/TI-IC
http://www.lprs.co.uk
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xxtigerxx
Joined: 05 Jun 2001
Posts: 208
Helped: 4
Location: Greece
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| 03 Feb 2008 21:15 Looking for the cheapest method to commincate in 433MHz |
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i am looking not only for modules but for ic like chipcon
does anyone use CC1100?
or does anyone use RFPIC12F275?
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Sadegh.j
Joined: 29 Nov 2006
Posts: 629
Helped: 30
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| 04 Feb 2008 6:26 Re: Looking for the cheapest method to commincate in 433MHz |
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| Search for a transceiver in this frequency, it should be easy to find. From what I know, hopeRF, wavecom and SIM are quiet cheap.
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haerifar
Joined: 02 Feb 2004
Posts: 112
Helped: 1
Location: Iran - Tehran
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| 04 Feb 2008 7:02 Re: Looking for the cheapest method to commincate in 433MHz |
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| xxtigerxx wrote: |
i am looking not only for modules but for ic like chipcon
does anyone use CC1100?
or does anyone use RFPIC12F275?
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what is your problem with this PIC ?
can explain it
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PaulHolland
Joined: 15 Jan 2003
Posts: 622
Helped: 59
Location: Holland
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| 04 Feb 2008 21:19 Re: Looking for the cheapest method to commincate in 433MHz |
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| Is this for mass production ?. If so I can help !. I designed a 433 MHz receiver for some 19 USD cent ! Transmitter is a little more 50 cnt USD.
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xxtigerxx
Joined: 05 Jun 2001
Posts: 208
Helped: 4
Location: Greece
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| 05 Feb 2008 18:53 Looking for the cheapest method to commincate in 433MHz |
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PaulHolland it is for mass production,
can you send me your designs?
Added after 1 minutes:
haerifar
i do not have any problem with microchip but
i did not use it yet.
Have you use it
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xxtigerxx
Joined: 05 Jun 2001
Posts: 208
Helped: 4
Location: Greece
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| 18 Feb 2008 8:24 Looking for the cheapest method to commincate in 433MHz |
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| Does anyone have a schematic with Rfpic12f675F with FSK modulation
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armixic
Joined: 09 Mar 2006
Posts: 30
Helped: 2
Location: U.S.A
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| 15 Mar 2008 1:36 Re: Looking for the cheapest method to commincate in 433MHz |
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| cc1100 is a good choice. Also, accel semiconductor has AS6801 transceiver can work at 433MHz.
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PaulHolland
Joined: 15 Jan 2003
Posts: 622
Helped: 59
Location: Holland
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| 15 Mar 2008 11:23 Re: Looking for the cheapest method to commincate in 433MHz |
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How much does the AS6801 cost and you have a datasheet ?.
For rfPIC16F675F look here:
AN238 - Tire Pressure Monitoring (TPM) System (microchip website)
http://www.microchip.com/stellent/idcplg?IdcService=SS_GET_PAGE&nodeId=1335&dDocName=en010385
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FvM
Joined: 22 Jan 2008
Posts: 1837
Helped: 335
Location: Bochum, Germany
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| 15 Mar 2008 12:09 Re: Looking for the cheapest method to commincate in 433MHz |
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| As a basic design decision, you should know if you need multi-channel capability. Then only synthesizer based transceivers, e. g. Chipcon are to choose from, rfPIC would be excluded. Said AS6801 has audio features, wouldn't expect it as a candidate for basic data communication, unless it has an extraordinary pleasant price.
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raduga_in
Joined: 29 Aug 2005
Posts: 199
Helped: 19
Location: India's Silicon Vally
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| 16 Mar 2008 19:41 Looking for the cheapest method to commincate in 433MHz |
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nRF 401 FSK transciver seems to be good for
that ..
Regards
Raduga
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blapcb
Joined: 07 Jan 2007
Posts: 37
Helped: 2
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| 22 Mar 2008 14:09 Re: Looking for the cheapest method to commincate in 433MHz |
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| nRF401 is a dead product. You have to look at nRF905
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satish.e.86
Joined: 06 Feb 2008
Posts: 1
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| 23 Mar 2008 16:41 Looking for the cheapest method to commincate in 433MHz |
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| check wit tws434 n rws434 ics
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rogerynt
Joined: 06 Mar 2007
Posts: 109
Helped: 11
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| 31 Mar 2008 6:03 Re: Looking for the cheapest method to commincate in 433MHz |
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| Use super-regenerative method with an op huplse shaper at demodulation out.
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chrismicro
Joined: 25 Jul 2006
Posts: 49
Helped: 3
Location: South Africa
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| 03 Apr 2008 9:09 Re: Looking for the cheapest method to commincate in 433MHz |
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| Look here http://patenttrade.net/picoffer.htm for the RR4 Receiver module at $6.95 USD a transmitter is also listed for $5.95 but I can help you with a diagram and outlay using a BFR93 transistor and a 433 SAW filter, note the outlay is very important to limit harmonics, if I can help PM me and I will upload the goodies
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DDavid
Joined: 06 Apr 2006
Posts: 170
Helped: 21
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| 27 Apr 2008 14:03 Re: Looking for the cheapest method to commincate in 433MHz |
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Hi
Try Analog Device family
AD7020-1
Almost Everything on-chip!
David
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springf2000
Joined: 13 Jun 2004
Posts: 413
Helped: 18
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| 03 May 2008 7:54 Looking for the cheapest method to commincate in 433MHz |
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| y can do a vco as the transmitter,maybe this is the cheapest bu the performance is poor, or y can choose the NRF403 as the transceiver of the 433M
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bes
Joined: 24 Sep 2002
Posts: 23
Location: China
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| 05 May 2008 17:45 Re: Looking for the cheapest method to commincate in 433MHz |
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There are so many RF modules in the http://www.mcurf.com/html/maine.htm . Maybe you can get find your favorable modules.
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rogerynt
Joined: 06 Mar 2007
Posts: 109
Helped: 11
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| 05 May 2008 19:09 Re: Looking for the cheapest method to commincate in 433MHz |
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| USe super-regen. transmitter and receiver.
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