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Type

QTY

Desc.

Rating 

Used With

1k

1

Metal Film

1/2W

ALL

1k

1

Metal Film

1//8W

ALL

8k2

1

Metal Film

1//8W

Choral Reef only

10k

1

Metal Film

1//8W

Choral Reef only

100k

2

Metal Film

1//8W

ALL

10M

1

Metal or Carbon Film

1//8W

ALL

100n

1

MLCC

25v min

ALL

4u7

1

MLCC

16v min

ALL

47uF

2

Low ESR Electrolytic

16v min Split Rail, Choral Reef

150uF

1

Electrolytic

25v min

ALL

BS170

1

ALL

J175

1

ALL

Inductor

1

Axial, 1mH

ALL

1N5817

1

ALL

Zener

1

*see chart

ALL

Relay

1

TQ2-L-4.5v/5v

ALL

LP2950

1

5v Regulator

ALL

TC7662B

1

Voltage Inverter

Split Rail only

Audio Jacks

2

NMJ6HCD2-SM

ALL

DC Jack

1

Kobiconn PC Mount

ALL

20k

1

Bourns 3362P trimmer

ALL

Switch

1

Momentary SPST

ALL

B.O.M.

 

 
 
 

18v

16v

13v

Blueprint, Bumblebee, Choral 

Reef, Dark Horse, Fiery Red

Horse, Focus, Mobius Strip, Old 

School, Pale Horse, 

Springboard, The Triplet, 

Triumvirate, White Horse

Merman

Alpha Dog, Blues King, 

Distortion3, The Scream

Zener Chart

 

 
 
 

Split Rail Projects

Blueprint, Bumblebee, Dark Horse, Focus, 
Mobius Strip, Pale Horse, Springboard, The 
Triplet, Triumvirate, White Horse

 

 
 

Additional notes from Peter: 
- The outer two legs of the J175 can be jumped for standard true bypass operation (instead of TrueSoft) 
- R6 can be 1/8W if using a power supply is 11V or less, or 1/4W if power supply is 15V or less. The 1/2W 
rating was put there in case an 18V power supply was used. 

Summary of Contents for VFE Switching Board

Page 1: ...VFE Switching Board 2017 madbeanpedals Some images 2017 VFE Pedals used with permission 8 7 update see pg 7 2 16 W x 1 33 H...

Page 2: ...e individual audio boards in each project since the common portions to all audio effects are handled by the Switching Board The Switching Board is held in place with board mounted audio jacks The mome...

Page 3: ...or powers the micro controller which in turn activates the coil on the relay It is decoupled with a 4u7 MLCC Do You Like My Parts For audio effects that use a split rail design a 7662 is used as an in...

Page 4: ...brightness 2 Q2 is used as a variable resistor In effect mode pin7 grounds the gate of Q2 and the resistance between the drain and source is on the order of 120 Ohm This acts as a small series resista...

Page 5: ...witch pressed To activate momentary mode do not press the switch for 5 seconds Then tap it twice quickly Now press and hold for a few seconds until the LED starts to blink You are not in momentary mod...

Page 6: ...is no chassis grounding point with the Switching Board or the hardware attached to it same goes for the audio boards Therefore we need to create a ground path to the chassis Peter demonstrates his me...

Page 7: ...ey are momentary but provide a click when pressed Regular soft touch momentary are less expensive and will work fine http smallbear electronics mybigcommerce com momentary spst no soft touch If you wa...

Page 8: ...NMJ6HCD2 SM ALL DC Jack 1 Kobiconn PC Mount ALL 20k 1 Bourns 3362P trimmer ALL Switch 1 Momentary SPST ALL B O M 18v 16v 13v Blueprint Bumblebee Choral Reef Dark Horse Fiery Red Horse Focus Mobius St...

Page 9: ...9 Switching Board Schematic...

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