Electronic – What do I need for a basic RF circuit

remote controlRF

I'm looking for any resource that can help me build a very very basic RC circuit. I'm talking as simple as using RF to turn on/off an LED. The purpose of this circuit is for research and education. If anyone knows where I can get parts for simple RF circuits or even a tutorial or schematic that would be really appreciated.

From what I've gathered, (and I'm an absolute noob to this) I will need a transmitter and a receiver… is that correct?

Honestly guys, I know you are all probably annoyed with this question and trust me, I wouldn't bother you all if I could find my own way into RF for beginners but really I'm having the toughest time finding good resources for RF circuit building. All I'm looking for is something to get me started in the right direction and then I can go from there.

I've googled about a thousand things to try and find info on this but all I end up getting are a bunch of RC planes/boats sites. Nothing for just regular basic do-it-yourself circuit building.

Please no infrared. I'm only interested in radio control. Thanks!

Best Answer

If you want complete DIY, which is probably not you best starting point, then something like this is about as simple as you can get. Receiver at left. Transmitter at right.

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That is from this wonderful page of RF ideas Homebrew RF Circuit Design Ideas These tend to be circuits only with no notes so a bit of a leap for a beginner.

with the actual circuit diagram here

A wireless doorbell may do what you want.

"ASK" RF data modules abound - finding them amongst the 1000 at a time Alibaba adverisers is the trick.

Here is one at $US6 with free shipping Uses nRF24L01 transceiver IC from Nordic.

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From Sparkfun - uses same IC - $20.

  • Description: The nRF24L01 module is the latest in RF modules from SparkFun. This module uses the 2.4GHz transceiver from Nordic Semiconductor, the nRF24L01+. This transceiver IC operates in the 2.4GHz band and has many new features! Take all the coolness of the nRF2401A and add some extra pipelines, buffers, and an auto-retransmit feature - very nice!

You can DIY it with the IC, burt here's what's on board (+ a power supply) enter image description here

There are many low power short range low cost wireless data modules available.

A large number of idea starters here look for small unhoused modules.

A bit fancy but would do what you want - but also somewhat complex to use and at GBP13.50 a bit expensive Pololu Wixel


433 MHz ISM band transceivers. $15US/1.here

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Transmitter $3 free shipping. Receivers will be ~ similar here

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panStamp here

Open source

  • panStamps are small wireless modules programmable from the Arduino IDE. Each module contains an Atmega328p MCU and a Texas Instruments CC1101 RF interface, providing the necessary connectivity and processing power to create autonomous low-power wireless motes. Everything contained into a compact DIP-24 module.

Store $18.55 basic unit.

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Units like this rare widely available at modest cost. This site only sells them in volume (probably).

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