Step #2: The IR Remote Circuit Design
- Almost any infrared remote can be used to activate the receiver module. You can just use any old remote that you have lying around your house. Or you can make it a little more fun and you can use specialty TV remotes that are made in the shape of magic wands, sonic screwdrivers, or phasers. But as fun as that would be, I decided to make my own remote from scratch.
- To make a really basic infrared remote, all you need to do is hook up an infrared LED to the square wave signal generator. So I built a simple circuit using a 555 timer IC.
- Pin 4 and 8 on the chip connect to the positive output wire of a battery pack. Pin 1 is connected to the negative output wire of a battery pack. Pins 2 and 6 are connected together. Then a 0.02 microfarad capacitor is connected between pin 2 and pin 1 (ground). A 1 kOhm resistor is connected between pin 2 and pin 3. Lastly an infrared LED and a 22 ohm resistor are wired in series between pin 3 and pin 1 (ground). Be sure to use a 22 ohm resistor that is rated for at least 1/4 watt, or it might overheat.
- When turned on, the LED will begin to blink at a frequency of about 36 kHz.
Step #10: Use Your Remote to Activate Other Random Effects
There are any number of other effects that you can control with this system. You can use a relay circuit to turn appliances on and off. You can hook up an air pump to blow out all the candles in the room. You can even activate full scale animatronics. Use your imagination. If you think of some other fun special effects that you could control with a hidden remote, leave a comment and share.