Crimson Drive SprintLayout 6.0 PCB

Manfred · Post by **Manfred** » 29 Sep 2024, 09:41

I built an EQD Crimson Drive version 2 clone three years ago
using a PCB I developed myself.
I used a BFW12 JFET, the pedal worked well.

Using BFW12:

Ready-to-Print PDF-files:

Crimson Drive PCB BFW12 Componets Side.pdf: (11.2 KiB) Downloaded 20 times

Crimson Drive PCB BFW12 Solder Side.pdf: (3.53 KiB) Downloaded 16 times

Gerber & Drill files:

EQD_CrimsonDriveVersion2 BFW12 Gerber & Drill files.zip: (9.53 KiB) Downloaded 16 times

Using J201:
Voltages were read in the original pedal.

Ready-to-Print PDF-files:

Crimson Drive PCB J201 Componets Side.pdf: (10.07 KiB) Downloaded 17 times

Crimson Drive PCB J201 Solder Side.pdf: (3.54 KiB) Downloaded 16 times

Gerber & Drill files:

EQD_CrimsonDriveVersion2 J201 Gerber & Drill files.zip: (8.79 KiB) Downloaded 16 times

SprintLayout6.0 File contains both Versions:

EQD_CrimsonDriveVersion2 Layout.zip: (51.17 KiB) Downloaded 19 times

Manfred · Post by **Manfred** » 30 Sep 2024, 15:00

I forgot to mention that the source resistance must be found new each time due to the large variations in the JFET parameters.
Select the value of the source resistance so that approximately half the operating voltage can be measured at the source pin.