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Author Topic: Chinese RF  (Read 7514 times)

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kourt

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Chinese RF
« 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 )

kam

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Re: Chinese RF
« Reply #1 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.

kourt

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Re: Chinese RF
« Reply #2 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 )

kam

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Re: Chinese RF
« Reply #3 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...

sysKo

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Re: Chinese RF
« Reply #4 on: June 22, 2009, 08:36:29 AM »
 ;)

spic0m

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Re: Chinese RF
« Reply #5 on: June 22, 2009, 19:16:51 PM »
Except the problem, what's the supposed purpose of that high technology :) piece you have?

kourt

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Re: Chinese RF
« Reply #6 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.

kam

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Re: Chinese RF
« Reply #7 on: June 22, 2009, 22:16:37 PM »
Both receiver and transmitter 7 eu?

kourt

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Re: Chinese RF
« Reply #8 on: June 22, 2009, 22:34:11 PM »
Excactly

kam

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Re: Chinese RF
« Reply #9 on: June 22, 2009, 23:14:44 PM »
Including shipping costs?

If it works, it is a nice deal!

spic0m

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Re: Chinese RF
« Reply #10 on: June 23, 2009, 10:22:57 AM »
RF for security? Encrypted ? Except that seems a nice deal.

kourt

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Re: Chinese RF
« Reply #11 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.  ;)

kam

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Re: Chinese RF
« Reply #12 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?

kourt

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Re: Chinese RF
« Reply #13 on: June 23, 2009, 20:09:09 PM »
push button

kam

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Re: Chinese RF
« Reply #14 on: June 23, 2009, 20:23:44 PM »
and what makes you believe that is safe?