{"id":266,"date":"2018-06-17T15:43:41","date_gmt":"2018-06-17T20:43:41","guid":{"rendered":"https:\/\/jacobncalvert.com\/?p=266"},"modified":"2020-09-14T15:46:57","modified_gmt":"2020-09-14T20:46:57","slug":"build-your-own-clean-boost-guitar-pedal-part-2","status":"publish","type":"post","link":"https:\/\/jacobncalvert.com\/blog-archive\/2018\/06\/17\/build-your-own-clean-boost-guitar-pedal-part-2\/","title":{"rendered":"Build Your Own: Clean Boost Guitar Pedal Part 2"},"content":{"rendered":"

The parts have arrived! It’s time for assembly.<\/p>\n

\"\"<\/p>\n

PCB and Parts are here!<\/h1>\n

The printed boards from OSHPARK arrived recently and so did the components. Below is a list of the components I selected for this board.<\/p>\n\n\n\n\n\n\n\n\n\n\n\n\n
Item<\/td>\nMfg<\/td>\nQty<\/td>\nDescription<\/td>\n<\/tr>\n
Enclosure<\/td>\nHammond<\/td>\n1<\/td>\nAluminum enclosure for stompbox<\/td>\n<\/tr>\n
Resistors<\/td>\nElegoo<\/td>\n1<\/td>\n525 pack of assorted resistors from 0-1M<\/td>\n<\/tr>\n
Diodes<\/td>\nMclgclM<\/td>\n1<\/td>\n100 pack of assorted diodes<\/td>\n<\/tr>\n
DC Barrel Jack<\/td>\nThreeBulls<\/td>\n1<\/td>\n12 pack of 5.5mm x 2.1mm<\/td>\n<\/tr>\n
Op-amp<\/td>\nFairchild<\/td>\n10<\/td>\nDual op-amp (LM358N)<\/td>\n<\/tr>\n
Capacitors<\/td>\nFoxnovo<\/td>\n1<\/td>\n125 pack of assorted capacitors<\/td>\n<\/tr>\n
Transistors<\/td>\nFUNMANY<\/td>\n1<\/td>\n450 pack of assorted transistors<\/td>\n<\/tr>\n
Footswitch<\/td>\nEtopars<\/td>\n1<\/td>\n6 pack of DPDT latching foot switches<\/td>\n<\/tr>\n
PCB<\/td>\nOSHPARK<\/td>\n3<\/td>\nPrototype PCBs from OSHPARK<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

Prototype PCB from OSHPARK<\/h1>\n

Check out the images of the PCB OSHPARK made for me.<\/p>\n

\"Prototype

Prototype PCB<\/p><\/div>\n

Some Corrections<\/h1>\n

I started to build the pedal circuit and realized I did not need 100mF caps everywhere. I re-simulated the circuit with 100uF caps, and it works just fine. I started with a huge cap value just as a placeholder and never updated the schematic.<\/p>\n

Prototype One<\/h1>\n

For the first build, I soldered the components on and just left fly wires hanging off. I did this so I could pump signals into it and test the circuit response. See the prototype one below.<\/p>\n

\"Prototype

Prototype One<\/p><\/div>\n

I didn’t save my oscilloscope captures.. I will remember next time! The good news is that from 20Hz to 8kHz there was a good solid amplification with minimal change of the input signal. Driving the input harder resulted in soft-clipping, but it was very minimal and still showed a solid gain performance. As predicted in the previous post<\/a>, there was an amplification of around 2-3x the input signal, resulting in a noticeable volume increase.<\/p>\n

Prototype Two<\/h1>\n

The second prototype is the “final product.” I stuck the circuits + inputs\/outputs in the enclosure I purchased. It made for a nice looking product at the end of the day.<\/p>\n