I'm going to give you a ton of information on how to use a sewing machine foot pedalI'd rather give you too much info instead of too little!
Foot Pedal Potentiometer - Sewing Machine Speed Controller (ADA3739) - Adafruit - Core Electronics Forum
Juki sewing machine Foot Pedal for TL-18QVP, TL-15, TL2010Q, TL2000Qi, – Aurora Sewing Center
Brother Model N5V ~ Sewing Machine Foot Pedal Speed Controller for Sale in Irvine, CA - OfferUp
Converse
Identification of filter component in sewing machine foot pedal - Electrical Engineering Stack Exchange
Sew a Non-Slip Sewing Machine Foot Pedal Pad
Electric Sewing Machine Foot Pedal Electronic Foot Pedal With Cord Universal Variable Speed Controller Foot Pedal Home
Foot pedal - Michley Tivax
What you will receive: package comes with 6 roman shade cord locks, enough quantity to meet your daily need, fitting for blinds, roman shades and
6 Pcs Roman Shade Cord Lock Holds up to 3 Cords Austrian Shade Window Blind Lock for Roman and Austrian Shades Home Indoor Use
Hacked sewing machine foot control for rotary tool
How to Replace a Sewing Machine Motor and Foot Pedal — The Mermaid's Den
Learn How to Control Sewing Machine Foot Pedal, Control speed
Foot pedal or stop/start button