need a tiny sized transmitter to remotely control Arduino Nano

Projects General Guidance
1

Hi, I have a need to remotely control an Arduino Nano. By "remote" I mean 2 or 3 ft, but it has to be wireless. Ideally the transmitter should be as compact as possible, it just need to have a button that allow one to toggle different mode on an Arduino program.

I did some study on this:
RF 315/433 MHz Transmitter-receiver Module

I wonder if there are even smaller options? The above transmitter will get pretty big if you hook it up to a Nano and with an antenna. Especially the antenna, I don't want 20 cm of wire dangling. Do I even need an antenna for such a close distance?

Thanks

2

e.g.: Hope RF-69

3

Pushbutton remote control

4
5

Short range - possibly simple 555 + IR

6

Hi,
Don't forget you are going to need to include a battery in your very little Tx.

Tom.. :slight_smile:

7

Thanks.

Do you know if the RF receiver would still receive signal if you place it along with its antenna inside a plastic enclosure?

8

Hi,
What is the application that needs this clandestine approach to design?

Tom... :slight_smile:

9

Infrared...

10

Ditch the nano and use two Wemos D1 minis. Or, a Zigbee (or Xbee) with trace antenna may do what you need without any uC. Also, plastic enclosure=no problem for any of these.

11

paulwece:
The above transmitter will get pretty big if you hook it up to a Nano and with an antenna. Especially the antenna, I don't want 20 cm of wire dangling. Do I even need an antenna for such a close distance?

So fit the Nano, transmitter and battery in the smallest box you can find and the loosly coil an insulated wire antenna inside the box. I would be amazed if it did not cover 3ft when built like that.

12

I’m guessing simple modulated IR transmitter is too complex?
Four components and a battery - in a bottle cap?