Mad Bean Pedals VFE Focus Quick Start Manual Download

Page: 6 / 9

Build Notes

As recommended on pg.4, jumper the two spots for the 100R resistors like so:

Voltages

Version 1.1 of the Focus (the board that ships with this project) requires a 1M resistor soldered across

the two outside pins of the right-side DPDT. This was added to prevent a small switch pop. Ver. 1.3

(the one shown on the Trace layout on pg.2) has this resistor on the PCB.

PS: Insofar as I can tell, there is not real difference in v1.1, 1.2, or 1.3 of the PCB other than this 1M

resistor. He may have done small tweaks on the trace routing or values but the values listed in the

BOM are for the last version, which is 1.3.

All voltages on the ICs should read about 0v DC except pins 8 and 4.

Pin8 (all): +7.86v

Pin4 (all): -6.8v

This is with the two 100Rs jumpered and using a One Spot with 9.42 nominal.

Current Draw: About 57mA

Summary of Contents for VFE Focus

Page 2: ...Note Use the values listed on the image above not the values indicated on the silk screen of the PCB Some values changed over time in the VFE product cycles Build Guide Dimensions 2 17 W x 2 025 H ...

Page 3: ...Trace Routing Knob Layout ...

Page 7: ...Wiring This project does require a charge pump on the Switching Board ...

Page 8: ...Schematic ...

Page 9: ...en before adding the 1M jumper across the DPDT right under the Focus v1 1 text Also the 100R resistors are on the PCB because I elected to short them on the bottom rather than remove them to lessen the chance of damaging it ...