Help Needed : In amplifying receiver RRFQ1 board

[piggypie]

I need help in designing a DC circuit using an operational amplify for receiver RRFQ1 board that can amplify the receiver

Anyone know how can i use an operational amplify a receiver RRFQ1 board?

 

[Nigel Goodwin]

Why do you want to amplify it?, it's a logic level data output?.

 

[piggypie]

hi

i would like to amplify it due to the weak signal strength, is there a way to re-design a circuit board to amplify it? thanks so much

 

[piggypie]

hi

i was told to amplify it to 5 volt ~

 

[Nigel Goodwin]

It's not a weak output, like I said it's logic level - check my PIC tutorial for how to use it.

 

[piggypie]

thanks

i am sorry but which part of the tutorial are you refering to? i can't find the logic section

 

[Nigel Goodwin]

Look on the hardware pages!.

 

[piggypie]

thanks so much

thanks so much

 

[piggypie]

just some queries

based on your tutorial, i manage to work out the circuit just that the frequency was unstable ~

if i send a frequency of 433Mhz into the transmitter, will it be able to receive the same amount of frequency or an amount near to 433Mhz frequency over at the receiver side?

 

[Nigel Goodwin]

Sorry, you're making no sense?.

The RF frequency is done entirely in the modules, nothing to do with you - they accept low speed data signals, and the receiver outputs a 'similar' (not the same) data stream - which is why you need Manchester coding or similar.

 

[piggypie]

ohh !

ohh ~! i guess i know what you means now.

thanks so much brother ~ i really appreciate your help -
you saved my life ~ thanks

 

[piggypie]

help needed

hi nigel,

i have a little problem with the circuit
i followed the hardware page and patch up the circuit,
however the circuit is unable to reflect any wave form..
no signal have been receive at the receiver end..

what might be the problem? is there any simplified version??

thanks so much for your help nigel,
best wishes

 

[Nigel Goodwin]

Post a picture of how you have built it, so we can see if we can spot any errors.

 

[piggypie]

hi nigel

hihi nigel,

i had upload the board print screen
i had added 74LS14 ic in both board, but both can't work..

"i followed the hardware page and patch up the circuit,
however the circuit is unable to reflect any wave form..
no signal have been receive at the receiver end..

what might be the problem? is there any simplified version??"

i wonder, what did i did wrong ~
thanks so much for your help bro..

best wishes,
piggypie

 

[piggypie]

help

http://www.geocities.com/demo080319/diagram.JPG

http://www.geocities.com/demo080319/diagram2.JPG

this is the 2 printscreen ~

 

[Nigel Goodwin]

Have you checked the data going in the transmitter, and out of the receiver, using a scope?

 

[piggypie]

yesh nigel i did, there was not signal ~
i've already tried it on the breadboard, it wOrked But it did Not Worked on the milled circuit board

i had uploaded a schematic diagrams..
http://www.geocities.com/demo080319/schematic1.jpg
http://www.geocities.com/demo080319/schematic2.jpg

 

[Nigel Goodwin]

If it worked on the breadboard, but not on the PCB, then it's pretty likely you've made a mistake on the PCB?.

 

[piggypie]

hi nigel -

initially it works on the breadboard but on 2nd try it failed..
i am pretty sure it's the receiver problem..
however i am not sure, what went wrong..
i tried upteens time but it just don't work..

http://www.geocities.com/demo080319/schematic1.jpg
http://www.geocities.com/demo080319/schematic2.jpg
http://www.geocities.com/demo080319/schematic3.jpg

base my schematic what do you went wrong ?
you are very experience in this area ~ can you advise me ~

thanks so much,
your help is greatly appreciated

piggy

 

[Nigel Goodwin]

The modules are really pretty foolproof, you connect them up as the datasheet says, and they work - it's as easy as that. I built my tutorial boards on stripboard, carefuly removing any unused tracks or portions of tracks, and they work perfectly.

What signal are you feeding to the transmitter module?, I presume you are aware that the modules are AC coupled?.