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General Category => General Discussion => Topic started by: kourt on June 19, 2009, 11:03:55 AM

Title: Chinese RF
Post by: kourt on June 19, 2009, 11:03:55 AM
Before one month i bought this chinese rf module from internet.
Please look carefully these photoes and you'll understand that something is missing and some works have forgoten.( i must say that it was very cheap )
Title: Re: Chinese RF
Post by: kam on June 19, 2009, 14:30:43 PM
loolloo.

Is it only the diode missing or....?

This is 100% a reverse spike cut-off diode. You need to have another one installed. You must either send it back, or put one by your own. If this circuit operates from 3 to 12 V, you can put a 1N4148 general purpose diode.
Title: Re: Chinese RF
Post by: kourt on June 19, 2009, 15:06:17 PM
I have already install one diode.
I think that also the solderines in this PCB are not so good .(some of them are by hand )
Title: Re: Chinese RF
Post by: kam on June 19, 2009, 15:35:49 PM
come on, it's chinese. In china they have spring rolls, tae chi and long walls. All others are just cheap...
Title: Re: Chinese RF
Post by: sysKo on June 22, 2009, 08:36:29 AM
 ;)
Title: Re: Chinese RF
Post by: spic0m on June 22, 2009, 19:16:51 PM
Except the problem, what's the supposed purpose of that high technology :) piece you have?
Title: Re: Chinese RF
Post by: kourt on June 22, 2009, 22:06:55 PM
It is a 4-channel rf , for a small security alarm system ( on/off )
and some remote on/off lamps in a factory .
I bought it about 7 euro.
Title: Re: Chinese RF
Post by: kam on June 22, 2009, 22:16:37 PM
Both receiver and transmitter 7 eu?
Title: Re: Chinese RF
Post by: kourt on June 22, 2009, 22:34:11 PM
Excactly
Title: Re: Chinese RF
Post by: kam on June 22, 2009, 23:14:44 PM
Including shipping costs?

If it works, it is a nice deal!
Title: Re: Chinese RF
Post by: spic0m on June 23, 2009, 10:22:57 AM
RF for security? Encrypted ? Except that seems a nice deal.
Title: Re: Chinese RF
Post by: kourt on June 23, 2009, 19:11:53 PM
Yes including shipping costs.I made the deal to e-bay but i can't find now excactly  the details of the deal.
Of course i don't use the rf alone for a secutiry system.It is combinated with something else.  ;)
Title: Re: Chinese RF
Post by: kam on June 23, 2009, 20:07:41 PM
Yes including shipping costs.I made the deal to e-bay but i can't find now excactly  the details of the deal.
Of course i don't use the rf alone for a secutiry system.It is combinated with something else.  ;)

what is this "else" thing?
Title: Re: Chinese RF
Post by: kourt on June 23, 2009, 20:09:09 PM
push button
Title: Re: Chinese RF
Post by: kam on June 23, 2009, 20:23:44 PM
and what makes you believe that is safe?
Title: Re: Chinese RF
Post by: kourt on June 23, 2009, 20:32:36 PM
Ok it is not the most safety system in the world but it is unexeptionably ( what the f english i speak  ; :D)
For unlock the system i must push this push button together with the rf.
Title: Re: Chinese RF
Post by: kam on June 23, 2009, 20:50:59 PM
loooolol i have no words to say!

Title: Re: Chinese RF
Post by: spic0m on June 23, 2009, 22:39:39 PM
I ask cause i've heard of some wirelles systems jammed with a simple walkie talkie in the past, and not home made systems, brand ones.
Title: Re: Chinese RF
Post by: sysKo on June 25, 2009, 22:17:51 PM
the robbers has "rf copy" machins. you press the button and they copy the code. and then they make the same code and open the door.
Title: Re: Chinese RF
Post by: kourt on June 25, 2009, 22:37:32 PM
Ok but it is supposed that you must know that the operation of this system is to push together one button and one 'rf'.
So if someone do this ,he is very 'around' to us.
Title: Re: Chinese RF
Post by: kam on June 25, 2009, 22:58:57 PM
 ::) ::) ::) ::) ::) ::) ::) ::) ::) ::) ::) ::) ::) ::) ::) ::) ::) ::) ::) ::) ::) ::)
Title: Re: Chinese RF
Post by: kam on June 25, 2009, 22:59:21 PM
it could be also that someone is watching you ....  ::) ::) ::) ::) ::) ::) ::) ::) ::) ::) ::) ::)
Title: Re: Chinese RF
Post by: kourt on June 28, 2009, 16:06:00 PM
If someone is watching me i can also watching him. 8)
Title: Re: Chinese RF
Post by: PCBpartner on January 15, 2010, 10:18:41 AM
loooolol i have no words to say!