# Need help on Radio remote control circuit(transmmiter&reciever)

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#### awaismqsd

##### New Member
Hello All.
I have to build a Radio remmote control circuit ...which should be capable of switching four(minimum) devices at a time.
just like walkie talkies and R/c toy cars...etc
I need help....coz i am not so expert.
kindly post a circuit diagram or related links.
thanx.

#### awaismqsd

##### New Member
Note:
i also tried to copy chines circuits from toys(qunxing) but these have unknown ic's and transistors.

#### philba

##### New Member
what are you using this for?

#### awaismqsd

##### New Member
i just want the circuit diagram to copy...
i m not using anything
actually i am in gaining process u know.....

#### HiTech

##### Well-Known Member
remote detonation of IEDs?

Your profile states that you are an engineer, you have access to the Internet, you browsed long enough to discover this electronics advice forum, but you can't locate schematic diagrams on one of a hundred hobby circuit web sites?

Moderators, please forward his IP addy. to the U.S. Department of Homeland Security or better yet, send info to:

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#### awaismqsd

##### New Member
rehilba

i just want the circuit diagram to copy...or any other source that could be helpfull to design.
i m not using anything
actually i am in gaining process u know.....

#### awaismqsd

##### New Member
no buddy i dont want this for detonation

#### HiTech

##### Well-Known Member
Here are a couple of "engineers" near you that you could take your request to!

#### zachtheterrible

##### Active Member
Do you have to build this or could you just buy the unit pre-built?

If you can get it pre-built, try allelectronics.com and digikey.com, I recall seeing some remote control systems that are pre-built.

#### audioguru

##### Well-Known Member
Hi Zach,
He is in Pakistan where the basic necessities of life are difficult to buy, so pre-built radio transmitters and receivers would not be available.

#### philba

##### New Member
it's kind of sad that a terrorist is indistinguishable from a hobbiest or student cheating on his home work.

I woulnd't be surprised if the black agencies are monitoring search requests from certain countries for certain keywords.

#### AllVol

##### New Member
philba said:
I wouldn't be surprised if the agencies are monitoring search requests from certain countries for certain keywords.
For one, I hope so, and would welcome such activity. I've often wondered how many of these "student queries" are genuine. If one has nothing to hide, one has nothing to fear.

AllVol

#### mramos1

My guess is homework, otherwise, go to walmart and get a cheap toy foam plane (300-500ft high kind) at $9.95, rip out the receiver (it is glue and styrofoam) and poof you have what you need. I used one as a water leakage detector to send a signal to the house, close a relay on the parallel port, and a PC program to SMS my phone. I can not believe how far they can transmit. Opps. Forgot, not in the states.. But what I would do.. If that does not help, then this is homework. AllVol: Go Gators.. Your avitar, is he standing barefoot in water puddle on the concrete floor? Kidding... #### philba ##### New Member shhhh..... #### mramos1 ##### Active Member awaismqsd said: Hello All. I have to build a Radio remmote control circuit ...which should be capable of switching four(minimum) devices at a time. just like walkie talkies and R/c toy cars...etc I need help....coz i am not so expert.. thanx. OK lets take a hard look at this. Where is he (assume HE) from. Sorry philBA.. But we need to do this, otherwise this could be a bad thing here in the US. Four things not blowing up at a time (maybe he has a lot of fireworks left over).. hehe. After this. shhh.. He needs to do four at a time (I think he is bad at asking homework questions). But he knows walkie-talkies and r/c toy cars and says "coz". I think he has a walmart close by (but I could be wrong). But the guy at the counter can not explain the circuit inside. So he came here. He is not "so expert".. "I need help....coz i am not so expert..". And slip of a long sentence "which should be capable of switching four(minimum) devices at a time" I think we are safe for the night.. Shhhhhh... #### awaismqsd ##### New Member HiTech said: remote detonation of IEDs? Your profile states that you are an engineer, you have access to the Internet, you browsed long enough to discover this electronics advice forum, but you can't locate schematic diagrams on one of a hundred hobby circuit web sites? Moderators, please forward his IP addy. to the U.S. Department of Homeland Security or better yet, send info to: How funny... Mr. one thing i must clear that i am not doing any thing wrong whatever u r thinking... do what ever u can.. i have no fear.. coz i have nothing to do wrong.. if u cant help me then plz do not comment,, thanx #### awaismqsd ##### New Member audioguru said: Hi Zach, He is in Pakistan where the basic necessities of life are difficult to buy, so pre-built radio transmitters and receivers would not be available. Hahahhaha what do u think Pakistan is..?? Mr. change ur concept about Pakistan... ur reply just depict ur mind .. i cant say about ur country coz i know how to respect.. Well sorry to say all this but i really shocked to read ur comment #### awaismqsd ##### New Member HiTech said: Here are a couple of "engineers" near you that you could take your request to! why u people make ur concept by seeing few bad peoples..??? i have seen so much odd in Euorpe but i cant say that all euorpe is like that. #### awaismqsd ##### New Member mramos1 said: My guess is homework, otherwise, go to walmart and get a cheap toy foam plane (300-500ft high kind) at$9.95, rip out the receiver (it is glue and styrofoam) and poof you have what you need.

I used one as a water leakage detector to send a signal to the house, close a relay on the parallel port, and a PC program to SMS my phone. I can not believe how far they can transmit.

Opps. Forgot, not in the states.. But what I would do..

If that does not help, then this is homework.

AllVol: Go Gators.. Your avitar, is he standing barefoot in water puddle on the concrete floor? Kidding...

Thanx Brother
and dont worry that i am not in states ..
one thing i tell u that..every allmost all the things are available here in Pakistan..
hope that i will find that.

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