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Pangea

FX type: Univibe-Tremolo

© Kastle 2015

Dimensions: 10 * 10 cm

PCB, schematic, and build document are for DIY use only

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Schematic from freestomboxes.org

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Schematic from freestomboxes.org

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Schematic from diy.thcustom.com

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BOM

Resistors R1 68k R2 8k2 R3 330k R4 100k R5 18k R6 330k R7 330k R8 39k R9 12k R10 12k R11 82k R12 68k R13 39k R14 150k R15 330k R16 39k R17 39k R18 39k R19 470k R20 1M2 R21 150R R22 150R R23 150R R24 150R R25 68R R26 150R R27 150R R28 2M2 R29 100k R30 150k R31 4k7 R32 180k R33 4k7 R34 100k R35 100k R36 100k R37 220k R38 22k R39 330k R40 12k R41 1M R42 180k R43 150k R44 100k R45 4k7

R46 4k7 R47 100k R48 180k R49 150k R50 4k7 R51 4k7 R52 100k R53 180k R54 4k7 R55 4k7 R56 100k R57 100k R58 68k R59 1M R60 1M R61 220k R62 150k R63 4k7 R64 220R R65 47k R66 680k R67 4k7 R68 1M R69 820k R70 10k R71 2M2 R72 150k R73 4k7 R74 1k R75 1k R76 150R R77 330k R78 330k R79 39k

Capacitors C1 100n C2 2u2 tantalum

C3 0.68u tantalum

C4 0.33uF tantalum C5 1000uF C6 1000uF C7 1000uF C8 100n C9 2u2 C10 15n*

C11 100n C12 100n C13 2u2 C14 2u2 C15 2u2 C16 2u2 C17 100n* C18 2u2 C19 2u2 C20 47n* C21 2u2 C22 2u2 C23 4n7* C24 2u2 C25 100n C26 100n C27 22uF C28 22uF C29 2u2 C30 100n C31 100n C33 100n C34 47uF

Diodes D1 1n4148 D2 LED3MM D3 LED5MM yellow diffused D6 1n4007 D11 1n5817 V1 5mm yellow diffused V2 5mm yellow diffused V3 5mm yellow diffused V4 5mm yellow diffused

LDRs V1 Gl5549

V2 Gl5549

V3Gl5549

V4 Gl5516

ICs IC1 LM324 IC2 LM324 IC3 ICL8038 REG1 7805 U1 PIC10F202P

Transistors Q1 2N5088 Q2 2N3904 Q3 2N5088 Q4 2N5088 Q5 2N5088 Q6 2N5088 Q7 2N5088 Q8 2N5088 Q9 2N5088 Q10 2N5088 Q11 2N5088 Q12 2N5088 Q13 2N5087 Q14 2N5088 Q15 2N5088 Q16 2N5088

Potentiometers VOL B100k BIAS B100k

INTENSITY B100k

SPEED(FINE) B100k SYMMETRY B50k

TRIM 4k7

TRIM2 4k7

Switches EFFECT

Rotary switch 4P3T

SPEED_Range Rotary Switch 2P6T K1 FTR-B4C relay

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Shopping list

Resistors 68R - 1 150R - 7 220R - 1 1k - 2

4k7 - 11 8k2 - 1 10k - 1 12k - 3 18k - 1 22k - 1 39k -6 47k - 1 68k - 3 82k - 1

100k - 10 150k – 6 180k - 4 220k - 2 330k - 7 470k - 1 680k - 1 820k - 1 1M – 4 1M2 - 1 2M2 - 2

Capacitors

4n7 – 1pc *

15n - 1 pc*

47n – 1 pc*

100n – 10*

0.33uF tantalum - 1

0.68u tantalum - 1

2u2 tantalum – 1

2u2 - 11

22uF – 2

47uF – 1

1000uF – 3

Diodes

LED5mm yellow diffused – 5 1n4148 – 1

LED5mm - 1 1n4007 - 1 1n5817 - 1

LDRs Gl5549 -3

Gl5516 – 1

ICs

LM324 - 2 ICL8038 – 1

Voltage regulator 7805 – 1 U1 PIC10F202P -1

Transistors

2N5088 – 14 2N3904 – 1 2N5087 – 1

Potentiometers

B100k – 4 B50k – 1

TRIM 4k7 – 2

Use 5k trimms if you can't find 4k7

Switches

Rotary switch 4P3T – 1 Rotary Switch 2P6T - 1

FTR-B4C relay – 1

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Drilling guide for 1590XX/1790NS

Dimensions are 10cm by 10cm

Please measure carefully, if you want to build it with cap mods and external speed control, you will have to use

smaller jacks like Lumberg jacks or similar to them.

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Relay wirinig guide with external speed control

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Relay wirinig guide without external speed control

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Wiring witout relay and with external speed control

If you are building this pcb without relay switching option, OMIT R74, R75, C34, C33, D2, D11, K1, U1,

Q16 and REG1

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Wiring witout relay and without external speed control

If you are building this pcb without relay switching option, OMIT R74, R75, C34, C33, D2, D11, K1, U1,

Q16 and REG1

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Overview

Pangea is based on the R.M. Voodoo Vibe and designed to fit into 1590XX/1790NS enclosure. Difference

between voodoo vibe and classic univibe circuit is in the audio side which has also incorporated tremolo, beside

vibe and chorus options, also LFO is based on ICL8038 chip and LEDs instead lamp and transistors. Good

thing with Pangea is that you don't need 18v power supply or charge pump for operating pedal properly.

On the pcb is also included relay switching (http://diy.thcustom.com/shop/miniature-relay-true-bypass-kit/)

designed by Thomas from THCustom Effects (http://diy.thcustom.com/product-list/) which brings this pedal to

another level when it comes to reliability of switching.

Controls

FUNCTION: The unit can be set to operate in Chorus, Vibrato or Tremolo modes .

SPEED RANGE: The Pangea enables a selection of three speed ranges of either Classic or Pulse waveform. These two different types of sweep waveform when used in conjunction with the Symmetry control will allow completely different types of sweep effects to be produced. The maximum speed has been greatly increased to provide a blurred effect with sub-harmonic undertones being produced as the frequency reaches maximum. The maximum speed capacity should be investigated in any of the three operational modes together with the various intensity and symmetry parameters.

SPEED: This control allows the fine setting of the speed range as selected by the Speed Range switch.

SYMMETRY: This controls the linearity of the Classic and ON/OFF ratio of the Pulse waves, which are used to sweep the filter sections or modulate the tremolo section. When the ratio of the rise and fall time of the Classic wave is varied from the usual symmetrical 50% to other values it has the audible effect of altering the way the filter sweeps as the symmetry is adjust ed away from the norm. It is now possible to have a fast rise and a slow decay or the reverse by manipulation of this control. The ON/OFF ration of the pulse wave can be varied in a similar manner to provide variable switching waveforms for the modulation filters or tremolo section. The intensity ,bias and symmetry controls work together providing a wide range of effects. Wild pulse tremolo sounds are easily created as well as outrageous modulation effects.

BIAS: This control enables the unit to be tuned to produce different sweep effects in the chorus and vibrato modes and will change the centre sweep frequency. In the tremolo mode the bias sets the depth of effect as well as the offset. This control is one of the most important sweep parameters to get ri ght and it pays to only make small changes and carefully evaluate them.

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INTENSITY: The level of depth of effect can be set by this control and is used in conjunction with the other controls to set up the effect required.

OUTPUT: This controls sets the Output Level required.

Trimmers

Trimmers are used for adjusting speed knob corner values, so there is nothing special about them, just set them where you like.. Just keep in mind that you need to consider slow and fast values.

Mods

There are few mods on this layout, output volume is set after output buffer, instead BC549C and BC559C transistors are used 2n5088 and 2n5087 or similar one like 2n3904 and 3906 (if you want to use BC549 and BC559C transistors just rotate them for 180*)

From original schematic C5,C6 and C7 should be 1000uF, but you can use lower values..

*Please note that in the BOM are shown original values in phase capacitor positions, I have found that best sounding combination is C10 47n, C17 3n3, C20 2n2 and C23 1n.

I have gathered a lot of combination that are written in the original topic on the freestompboxes.org and here they are shown in the table below.

Phase capacitor table Combination C10 C17 C20 C23

brejna 47n 3n3 2n2 1n Voodoo vibe 15n 100n 47n 4n7

Modded Voodoo 15n 100n 470p 2n7 Bajaman 15n 100n 470p 27n Univibe 15n 220n 470p 4n7 RT-18 4n7 3n3 2n2 1n

Jax Vibra 15n 100n 500p 47n Multiplier 5.97 100n 17n 2n8 470p Multiplier 6.66 100n 15n 2n2 330p Multiplier 7.77 220n 28n 3n3 407p Multiplier 8.15 220n 27n 3n7 470p

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Since there is interest about doing phase capacitor mod, here is single side board that should fit

in the 1790NS enclosure.

Dimension of each is 43.49cm * 31.41cm

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Important thing about phase cap board is that you follow capacitor values so you don't mix up them.

Keep in mind that on the additional board you can make 3 combinations:

- First one is C1-C4-C7-C10

- Second on is C2-C5-C8-C11

- And third one is C3-C6-C9-C12

Example, if you want brejna, Voodoovibe, Bajaman combination..

Combination Phase capacitor value

brejna C1 C4 C7 C10 47n 3n3 2n2 1n

Voodoovibe C2 C5 C8 C11 15n 100n 47n 4n7

Bajaman C3 C6 C9 C12 15n 100n 470p 27n

Also here is double side pcb with the link for OSH park

https://oshpark.com/shared_projects/Kb81hAwg

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Wiring phase cap board to the main board

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Few tips for that could also help you..

First populate sockets..

Then resistors and diodes...

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Then you can populate trimmers..

Thanks to kgull who shared his universal trimpot

After trims you can populate transistors.. Since there is only one PNP transistor populute Q13

and then you can go to the others..

After that comes all caps, voltage regulator, LEDs, LDRs and relay..

You should populate voltage regulator before C7

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Also populate C6 before C5

If you don't want to use external speed control, solder these two pads as it is shown

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Now you can solder rotary switches and potentiometers..

Since rotary swiches are higher then pots, you can put something under potentiometers so they

are in same level.

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If you are using phase capacitor mod like I did, be carefull with position of input and output

jacks..

And there it is, I hope you will enjoy it..