Your probably thinking "This is great but how can i control my coffee maker with my phone?" Well here's the solution, You will need a relay. It allo...
Step 5: Connect the transistor
Now you will need to connect your transistor to your Arduino and to your device. Look at the picture below for how to wire it up. I have annotated it if you need help. That little black thing is your device. If you know the polarity of the wires you can connect the positive to the left terminal of the transmitter and the ground to the right terminal
If you want to control more buttons connect additional transistor's the same way but instead of using pin 12 use 8, 9 or 11
Bio:I live in Toronto, Canada and I build almost anything computer related, Anything from robots to computer interaction devices. My favorite programming language is C+ and micro controller is avr with t...read more »