i am a complete newbie to RC field. this is my first post! 

i was planning on building a RC boat. the prices of the 2.4ghz rx/tx combos drove me away. so i am looking at the 27mhz tx/rx.
can anyone tell me if i can connect this circuit to ESC, LiPo etc?

also, where can i get such a rx.tx?

i have no worries about interference as there arent any other RC enthusiasts in my area.

PS: i have a RC car which runs on 27mhz, but i guess i cant use that circuit cuz it only makes the motors on/off.

Hi Sukrut! You can surely use a brushed ESC as well as a LiPo with the 27 MHz Tx/Rx. However, you cannot have proportional throttle, only 'ON/OFF'. I have done this before and can give you the details. For proportional control you'll need microcontrollers which in the end turns out to be as costly as a cheap 2.4GHz radio.

You can also use the circuits from your 27MHz car easily if you are familiar with basic electronics.

If you don't want any hassle with circuits, you can check out the Radios on 'RcBazaar.com' . They are fairly priced.
Here's the link:
http://www.rcbazaar.com/category/64-transmitters-receivers-24ghz.aspx

The cheapest one will cost you  1970.
Good Luck!

hey sukrut welcome to RC india..

Quote from: sukrut on June 26, 2011, 06:28:57 PM

i have no worries about interference as there arent any other RC enthusiasts in my area.

and hey what do you mean by this ... i stay hardly 2km from your house( anyways i have a 72 Mhz radio). and i got u here.

i guess swapnil is right in this case. the only thing you will face on 27Mhz is that all remote controlled toys are on the same freq. so there will be chances of interference more. as long as your on the ground u wont face any prob.. but dont try gettin this in air..!!

the RC bazzar transmitter is pretty good and value for money. so u can go for it.. or ask for some second hand here.!

Quote from: sukrut on June 26, 2011, 06:28:57 PM
i was planning on building a RC boat.
...
PS: i have a RC car which runs on 27mhz, but i guess i cant use that circuit cuz it only makes the motors on/off.

Look, if all you want to build is a simple boat (and don't plan getting into aircraft) then for a small budget the circuits from your 27MHz car can be economical and easy to work with. Also interference problems can be avoided using encoder-decoder ICs.

Hi, Sukrut,

You can do an speed controller that can increase speed/decrease reverse speed by forward and decrease speed/increase reverse speed by reversing the control.

It will make the control motor rotating forward/reverse and hence a comperator pot to make forward/reverse drive voltage upto extreem right/left. Just search the forum, you wll get your desired thing.

But if you dont know electronics, go for a readymade one.

@swapnil: yes. thanks! looks like i'll have to invest anyway!

@KALYANPRODHAN : i dint quite get what you're saying. i stumbled upon another idea though (don know whether you were saying the same thing! ). what can be done is, i use another circuit wherein i can control the throttle. send this signal to the tx. basically the other circuit will send signal pulses at very fast rates to the rx via my tx. but i need someone to help design a circuit which will do this! also, will the rx be able to handle such fluctuations??

No Sukrut, that won't work unless you use a microcontroller. The tx/ rx you are reffering to is 27 MHz right? Like I said, I've done that, but it's complex. What Kalyan sir is suggesting, I think, is to use a motor-controlled pot to control the voltage and hence speed of the motor.