Hello, I have built a wireless pedal board. I can now control my amp and my effects from switch panels taped on my guitars. Effects are located in a box and connected to my amp by short patch cables (mono 1/4 jack). So I tried to add a new function, kind of programmable volume control by using a micro servo. I have chosen this el-mechanical solution because I didn't want to modify my amplifier. I was afraid that two sided tape wouldn't be strong enough to hold servo in position and worried about hundred other things. See video clip: http://youtu.be/yxiDniBHDig Both mechanical transmition and arduino sketch turned out to work perfectly but micro servo caused another problem: Audio noise, a lot of audio noise, booming, buzzing and popping noise. Not only from my amp but it affected PA and few other amps in the room. (You can't hear the noise because I don't have a speaker cabinet at home so amp was off while I was recording video)
I wonder is there any way to prevent this noise... Maybe micro servo and audio equipment just don't work together.