The Buffer-Splitter project allows you to split your signal from one input to two outputs. This is helpful if you want to go from a Mono output of one effect into a stereo input of another effect, or could be used as a splitter for sending a buffered signal to your signal chain and a separate buffered signal to a tuner, giving you no impedance issues while splitting your signal.

The Headphone Amplifier project gives you a way to easily practice your guitar when you wouldn’t be able to otherwise. This is helpful if you have napping children, or live in an apartment and want to play late at night, or if you’re on the road and want something small and battery powered to take with you to practice.

The JFet Matcher project is a specialized device that allows you to match JFets when building effects that require closely matched JFets. This is helpful when building Phase 90 or Phase 45 type projects in particular.

The Test Oscillator project creates a sine wave tone that is in the same frequency range as your guitar. This is helpful if you are testing DIY projects and would like to be able to put your guitar down while your tweak your project or trouble shoot.

The Blender project allows you to add a clean blend to a pedal of your choice, or to build a clean blend pedal you can use with any other pedal of your choice.