I wrote a magazine called "SugarFoot Electronic Projects for DIY Musicians" - it is available HERE: https://www.lulu.com/shop/ls-steele/sugarfoot-electronic-projects/paperback/product-2m59jey.html?q=sugarfoot&page=1&pageSize=4 I studied electronics and have spent my career as an Audio Repairman at Circuit City and Protronics. I transitioned into electronic assembly and loved building rather than repairing! I've worked with companies that made medical and military equipment. I've built the wiring harnesses for Aircraft Carriers and MRAP (mine-resistant, artillery protected) Vehicles that protect our Troops (USA!). I taught myself to design schematics and layout circuit boards while working for an Ultrasonic Equipment builder call Sonix4. I redesigned their circuits, making them more reliable and designed new circuits for them, however, the company was mismanaged, so I went out on my own and designed a superior Ultrasonic Generator and manufactured my own Ultrasonic Cleaners that sold very well with Vinyl Record Collectors. When the pandemic hit, I couldn't get parts I needed, so I designed and manufactured Footpedals (Stompboxes) used by Guitar Players, since I have a history of playing guitar in many local bands. Unfortunately, everybody and his brother builds stompboxes, so sales are almost non-existent for my line of SUGARFOOT PEDALS. So, now I share my work. Have Fun! Make Stuff!!!