BYOC Parametric Overdrive User manual

Build Your Own Clone
Parametric Overdrive
Kit Instructions
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Warranty:
BYOC, Inc. guarantees that your kit will be complete and that all parts and components
will arrive as described, functioning and free of defect. Soldering, clipping, cutting,
stripping, or using any of the components in any way voids this guarantee. BYOC, INC
guarantees that the instructions for your kit will be free of any majors errors that would
cause you to permanently damage any components in your kit, but does not guarantee
that the instructions will be free of typos or minor errors. BYOC, INC does not
warranty the completed pedal as a whole functioning unit, nor do we warranty any of the
individual parts once they have been used. If you have a component that is used, but feel
it was defective prior to you using it, we reserve the right to determine whether or not the
component was faulty upon arrival. Please direct all warranty issues to:
[email protected] This would include any missing parts issues.
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Return:
BYOC, Inc. accepts returns and exchanges on all products for any reason, as long as they
are unused. We do not accept partial kit returns. Returns and exchanges are for the full
purchase price less the cost of shipping and/or any promotional pricing. Return shipping
is the customer’s responsibility. This responsibility not only includes the cost of
shipping, but accountability of deliver as well. Please contact
[email protected] to receive a return authorization before mailing.

Tech Support:
BYOC, Inc. makes no promises or guarantees that you will successfully complete your
kit in a satisfactory manor. Nor does BYOC, Inc. promise or guarantee that you will
receive any technical support. Purchasing a product from BYOC, Inc. does not entitle
you to any amount of technical support. BYOC, Inc. does not promise or guarantee that
any technical support you may receive will be able to resolve any or all issues you may
be experiencing.
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That being said, we will do our best to help you as much as we can. Our philosophy at
BYOC is that we will help you only as much as you are willing to help yourself. We
have a wonderful and friendly DIY discussion forum with an entire section devoted to the
technical support and modifications of BYOC kits.
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www.byocelectronics.com/board
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When posting a tech support thread on the BYOC forum, please post it in the correct
lounge, and please title your thread appropriately. If everyone titles their threads
“HELP!” then it makes it impossible for the people who are helping you to keep track of
your progress. A very brief description of your specific problem will do. It will also
make it easier to see if someone else is having or has had the same problem as you. The
question you are about to ask may already be answered. Here is a list of things that you
should include in the body of your tech support thread:
1. A detailed explanation of what the problem is. (more than, “It doesn’t work, help”)
2. Pic of the topside of your PCB.
3. Pic of the underside of your PCB.
4. Pic that clearly shows your footswitch/jack wiring and the wires going to the PCB
5. A pic that clearly shows your wiring going from the PCB to the pots and any other
switches(only if your kit has non-PC mounted pots and switches)
6. Is bypass working?
7. Does the LED come on?
8. If you answered yes to 6 and 7, what does the pedal do when it is in the "on" position?
9. Battery or adapter (if battery, is it good? If adapter, what type?)
Also, please only post photos that are in focus.
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Copyrights:
All material in this document is copyrighted 2014 by BYOC, Inc.

Parametric Overdrive Kit Instruction Index
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Parts Checklist……………………….................…....page 6
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Populating the Circuit Board…….................…...…..page 8
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Main PCB Assembly..................................................page 18
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Wiring……………………………….........................page 22
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Installing the IC/Finishing up………………….......page 28
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Operation Overview...................................................page 29
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Modifications………………………………………..page 30
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Schematic....................................................................page 32

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This is \\'bat your kit should look like when it's complete. Your kit may come with
different color capacitors, switches ect. Don't be alarmed by this. They all still do
the exact same thin2-
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Res i sto r s:
Parts Checklist for Parametric Overdrive Kit
1 – 100 ohm (101) (Brown/Black/Black/Black/Brown)
1 – 470 ohm (471) (Yellow/Purple/Black/Black/Brown)
4 - 1k (102) (Brown/Black/Black/Brown/Brown)
2 – 2k2 (222) (Red/Red/Black/Brown/Brown)
2 – 3k3 (332) (Orange/Orange/Black/Brown/Brown)
1 – 4k7 (Yellow/Purple/Black/Brown/Brown)
7 - 10k (103) (Brown/Black/Black/Red/Brown)
7 – 22k (223) (Red/Red/Black/Red/Brown)
1 - 270k (274) (Red/Purple/Black/Orange/Brown)
1 – 680k (684) (Blue/Gray/Black/Orange/Brown)
3 – 1M (105) (Brown/Black/Black/Yellow/Brown)
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Visit www.byocelectronics.com/resistorcodes.pdf for more information on how to
differentiate resistors.
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Capa ci to r s:
1 – 470p Ceramic Disc
3 – 100n film cap (may say “104” on the body)
2 – 2n2 film cap (may say “222” on the body)
1 – 6n8 film cap (may say “682” on the body)
1 – 10n film cap (may say “103” on the body)
3 – 33n film cap (may say “333” on the body)
1 – 220n film cap (may say “224” or “u22” on the body)
3 - 1uf film cap (may say “105” or “1u” on the body)
1 – 10uf Aluminum Electrolytic
1 – 47uf Aluminum Electrolytic
2 – 100uf Aluminum E lect rolyt ic
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Visit www.byocelectronics.com/capcodes.pdf for more info on how to differentiate
capacitors.
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Diodes:
1-1N4001 diodes
2 – 1N4148
1 – 1N4733A 5.1v zener diode
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IC's:
2 - DIP 8 socket
2 - 4558
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Transistor:
4 - 2N3904, 2N5088, 2N2222, or similar transistor with EBC pin out

Potentiometers: SNAP OFF THE SMALL TABS ON THE TOP OF THE POTS
OFF WITH A PAIR OF NEEDLE NOSE P L I E RS. IF YOUR POTS HAVE
COVERS, REMOVE THEM BEFORE CONTINUING. YOU MIGHT HAVE TO
CUT A SLIT IN THE COVER WITH A BLADE AND USE A SMALL
SCREWDRIVER TO GET LEVERAGE.
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1 –
B10k
1 – A100k
1 –
B100k
1 – C100k Dual
G a ng
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Ha r dwa re:
1 - predrilled enclosure w/ 4
s c r e ws
1 – Parametric Overdrive circuit
board
1 – DPDT On/Off/On toggle
sw itc h
1 - 3pdt
footsw itc h
4 -
knobs
1 - AC adaptor
jac k
1 - ¼”stereo
jac k
1 - ¼” mono
jac k
1 - battery
snap
1 - red
LED
4 – rubber
bump e rs
2 – lock washers (for in and out
jac ks)
hook-up
w i r e

Populating the Circuit Board
Step 1: Add all the resistors. Resistors are not polarized and can be inserted in eithe r
direction and will be standing on
en d .

Step 2: Add the diodes. Be sure to match the end of the diode with the stripe
to the layout on the PCB. The striped end should go in the square solder pad

Step 3 Add two 8 pin IC sockets. ONLY SOLDER THE SOCKET! NOT
THE ACTUAL IC! This is a socket. The sockets get soldered to the PCB.
The ICs get inserted into the sockets. The actual IC chip itself, never gets
soldered. You will insert the IC into the socket after the entire pedal has
been built.

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Step 4: Add the transistors. Orient the transistor so that the flat side match es up with the
flat side on the PCB layout.
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Step 5: Add the film and ceramic disk capacitors. These are non-polarized so they can go
in either di rection .
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Step 6: Add the aluminum electrol ytic capacitors. These ARE polarized, meaning th ere
is a positive and negative end. The positive side will have a longer lead and goes in th e
square solder pad. The negative side will have a shorter lead and a stripe running along
the body of the cap, and. :oes in the round solder pad.

Step 7: Add the jumper. For this you just use a scrap of left over clipping from one of
the other co mponen ts .
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Step 8: Add the battery snap.

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At this point your board should look like this:
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Step 9: Add wires to the IN, OUT, RING, -, +, (+), and the two Ground êê eyelets. Start
by cutting four 2.5” pieces of wire and 4 pieces of 1.5” wire. Strip 1/4” off each end and
tin the ends. Tinning means to apply some solder to the stripped ends of the wires. This
keeps the strands from fraying and primes the wire for soldering. Solder one end a
2.5” piece of wire to each of the IN, OUT, and Ground eyelets on the PCB. Load the
wires in from the top and solder on the bottom of the PCB. Do the same with the 1.5”
pieces of wire for the RING, -, +, and (+) eyelets.

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Main PCB Assembly
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Step 1: Mount the AC adapter jack to the enclosure. Your kit may come
with either an external thread or internal thread. Don’t get confused by this.
They still function exactly the same. You just thread the external nut on the
outside and the internal nut on the inside. The picture below is of an internal
nut jack.
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Step 2: Flip the PCB over so that the bottom or solder side is up. Insert the
four potentiometers, toggle switch and the LED into the bottom side of the
PCB. If your pots have covers, remove them before continuing. You
might have to cut a slit in the cover with a blade and use a small
screwdriver to get leverage. DO NOT SOLDER ANYTHING YET!!!
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The LED will have one lead that is longer than the other. THIS WILL GO
INTO THE SQUARE SOLDER HOLE.
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There are only two ways you can insert the toggle switch. Either way is
fine.
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Step 3: Hold the PCB in one hand so that the component side of the PCB is
in the palm of your hand and the bottom side with the pots, toggle switch
and LED is facing up. Now use your other hand to guide the predrilled
enclosure onto the PCB assembly so that the pots, toggle switch and LED all
go into their respective holes. Once the PCB assembly is in place, secure it
by screwing on the washers and nuts for the pots. Only tighten them with
your fingers. You do not want them very tight yet. Make sure you’ve
removed the nuts and washers from the pots and that you’ve also snapped
the tabs off the pots as well before installing.
Step 4: Turn the entire pedal over so that the component side of the PCB is
facing up. Lift the PCB up off the pots about 2mm just to make sure that the
back of the PCB does not short out against the pots. Make sure the PCB is
level and symmetrically seated inside the enclosure.
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Step 5: Solder the pots, toggle switch and LED. You will be soldering on
the component side (top) of the PCB. After you have soldered them in
place, be sure to tighten up their nuts. TIP: only solder one lug of each
component at first. This will secure everything in place and still allow you
to wiggle things around if you need to adjust the fit of anything. Once you
have everything perfect, go ahead and solder everything else.