How to use a guitar to control a synth via MIDI

You can control a MIDI compatible synth with your guitar by using a MIDI pickup or a device like the "Sonuus G2M Universal Guitar To MIDI Converter". It's monophonic and under $100. This will allow you to trigger individual MIDI (synth)  notes with your guitar. Additionally you could use this with a combination of  software and a MIDI sending foot controller device to toggle different  effects on and off.