RATE: This changes the speed at which the LFO automatically varies the pulse width, from slow to raygun-fast.
LFO TOGGLE: This turns the LFO on and off. The LFO varies the pulse width at a speed and intensity that are set with the knobs directly adjacent to it. NOTE: The two knobs to the left and right of this switch do nothing unless this is turned on.
VOLUME: It does the thing!
DEPTH: This changes the intensity of the LFO. When it is turned down, the LFO softly shifts the pulse width, and when it’s all the way up, the most dramatic effect is heard.
PULSE: This control takes your square-wave guitar signal and changes the width of the “on” square wave. While this can be hard to visualize, it’s easy to see what it’s doing as you twist the knob. You can think of this control as the “flavor” or “character” of the synth. On one end, it sounds nasal and high-pitched, and on the other, it’s deep and fat. Like a “cocked-wah” effect it’s best experienced in any position well after fiddling with the knob and easing into the sound it creates.
The Knight School Synth accepts a center-negative DC power supply capable of supplying 9 volts and at least .5mA of current (over is fine). Plugging in anything other than this (center-positive, AC, higher voltage) will damage the pedal, maybe even beyond repair. Check your supply and make sure it says all the right stuff. Plugging in the wrong supply will void the warranty and possibly summon a puff of ozone-tinged smoke. Trust me, you’d hate it.
DIY KIT INFORMATION
The circuit board has everything labeled as to what part goes where. You'll find the below image very helpful to identify what parts are what. There's also a video below showing you how the process will go.
WATCH IT BEING BUILT
A BIT ABOUT PARTS
Identifying the resistors
Unfortunately there aren’t many but there are some! We only provide you with the components for our build, but feel free to try these mods with other parts you obtain and we are happy to chat with you about how it's going!
Changing the LFO speed:
The 4u7 electrolytic capacitor governs the range of the LFO rate control. It has been selected for my favorite range, but you can change this out for any other electrolytic capacitor. Bigger values shift the range down, and smaller values do the opposite.
Like many guitar effects, the range of the device opens up by enlarging the output capacitor. In this circuit, the 100n capacitor is that device and enlarging it slightly enhances the low end of the circuit.