Guitar pedals and music effects are very interesting to experiment with, so I decided to come up with something new and original. Using minimum possible components I made a circuit that simply breaks and rejoins the connection between the guitar and the amp. But thats not the catch,
This pedal can be controlled without coming in contact with the pedal.
The setup uses an ultrasonic sensor (Popularly, used for obstacle avoidance in robots) to calculate the distance from the pedal, and activate the effect accordingly. Also the closer you move towards the pedal, the more shallower the effect gets.
Well, if I've got your attention and your head is bubbling with ideas, here is , how I made it!-
Step 1- Watch the video-
Step 2- Get the parts-
1. An Arduino ( Uno or Nano) ( a clone would also do the trick)
2. A single channel relay (an electro-mechanical switch)
3. (1/4 inch mono sockets) x2
4. Ultrasonic sensor module (HC SR04)
5. A toggle switch
6. A DC socket ( to use external power supplies between 6-12V)
7. Some wires (of-course)
8. An Enclosure( Preferably, not metal, to reduce noise)
Step 3- Wire it up!
I've tried my best to make the diagram as clear as possible, however, if you face any problems, just leave a comment.
Step 4- Upload the code to the Arduino
If this is the first time you're using an Arduino, do some googling and get acquainted with basic Arduino programs.
Simply copy-paste this program onto your Arduino IDE, Here's the code-
And that's it, it should work if you've done everything correctly.
Now that you've got it to work the way I designed it, you can use this as a base for a bigger and better project :). Let your creativity overWrite my code.
You would have realized that the relay is a bit (VERY VERY VERY NOISY) noisy.
For sure, using a relay for this purpose is not the best idea, but is definitely the easiest way to go about it. If you're interested in improving on this you could read about( or if you already know), using a transistor as a switch for this purpose.
This was a fun project, I made 3 years back when I had no knowledge about analog electronics. Now that I'm equipped with some engineering background, I'm remaking this project, with a digital potentiometer and optocoupler IC which should be way more usable and practical. Also please ignore my over-enthusiastic explanation that I wrote as a kid :P