Electronics Technology Lab Report Number 10

Work on my project is winding down. I currently have a fully functioning light-dependent distortion unit and a tremolo unit spliced together to the output of my guitar. I am still having issues with the tremolo. The circuit I am using utilizes an LM555 timer and when it is introduced to my circuit it creates a small click every time it turns on and off. Read through an oscilloscope, this modulation actually occurs through the power source as well, so to eliminate it, I will need to completely isolate the 555's power, which, for my application, is not entirely plausible. I also cannot use the photoresistor to vary the speed of the tremolo as there is no way to reverse the direction in which the resistance fluctuates due to light exposure. One idea I have is to use an oscillator and a JFET. This way, I could use a photoresistor to vary the frequency of the oscillator and feed the output into the base of the JFET so that the wave restricts the current flow through the JFET. When I splice the JFET ends into my circuit, it should sound relatively like a tremolo.
I tried to use a summing amplifier to combine the signals from my different effects, however the quality of op amps that I have, the LM358s do not provide a very clean signal at all. In fact, when I hooked it up, the amplifier provided more distortion than my distortion unit. Simply splicing the outputs together does fine currently so that is what I will stick with.
My biggest development from now till the end is putting my project onto my guitar. I will drill holes in the pickguard to mount my photocells and potentiometers. My eventual plan is to house the entire system within the electronics cavity of the guitar, however, I will need to route out the cavity more to accept more electronics and I also need to create a PCB for the system so that it will be solid instead of just on a breadboard. For now, I will just run the photoresistor leads out from under the pickguard and into a small box that I will mount on the body of the guitar which will house my breadboard. 
Below are video demonstrations of

Distortion:

and Tremolo: