theVoltist

 The NOTADUMBLE  Schematic I purchased my kit several months ago when the "final sale" was announced, but only recently got around to building it. The kit itself is cleverly designed and is truly the IKEA of guitar pedal kits. I wanted to learn more about what makes these two Dumble circuits unique, so I decided to reverse-engineer the circuit and create a schematic.  Luckily, the board is a simple double-sided design, so it was fairly easy to trace out. I used various online resources to decipher the SMD component codes when the components were marked. For the ceramic capacitors, I employed engineering best practices to estimate the values along with Spice simulation and in-circuit measurements. The resulting schematic is shown below: PDF version Input/Output PCB The kit breaks apart into two circuit boards: the Input/Output PCB (Footswitch PCB) and the Main PCB. The Footswitch PCB is shown in the upper left corner of the schematic, which should be self-explanatory. The ...