To keep it simple, you will need to seed the device with the basic key generation logic or at least directly store them there along with the destination address. Connect it with some form of input, like a button and wifi. Whenever you push the button, say for 3 seconds, you would sign a transaction to send an amount of cryptos to your fixed target address. You can later make it customize the amount.
That sounds like interesting idea but I won't be able to make that myself without following some instructions or tutorial.
I heard from my friend about Duino coin where you can mining it using Arduino
Thanks, I saw that but I am not interested in mining any altcoins and I only have one Arduino Nano device.