I implemented a guitar stomp box circuit several years ago. It eliminates 50-60Hz hum for single-coil guitar pick-ups. I implemented and simulated this circuit in LTSpice. I then had a design shop convert the Spice circuit to Altium for fabrication and assembly. I recently had a prototype built from the Altium files. It does not work properly. It was not assembled at an assembly house; it was done by hand. The circuit isn't working properly. Is the circuit incorrect or did we botch the hand assembly?
1. Compare the Spice source code with the Altium schematic. Is the translation faithful? There are 20 op-amps and almost 100 caps and resistors. I checked the translation 3 times. I *think* it is clean, but I could be wrong. If there is a translation error(s) please identify it/them.
2. Please review the corrected circuit. Can it be optimized for BOM cost? I used a notch filter. Should I have used an HPF? Can the circuit be improved?
3. Based on (1) and (2), please update the Altium design and generate the fabrication and assembly files for the project.
I designed this circuit when I could see. I am now blind and can't take the project any further.
You will need access to Altium and Spice for this project.
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