RYO Optodist Bedienungsanleitung

Ljunggren Audio

Roll Your Own

Optodist

Version: Optodist/VCA 1.0

and Optodist/VCA 1.1

Bill Of Material

Changes from version 1.0 to 1.1

•The unused R8 resistor footprint is removed.

•The holes for the pototentiometer housing pins is enlarged to accomodate oth

standard 9mm Alpha and custom pots.

•Square instead of round pads on the jack housing pins.

•Different PCB colour.

Please note: Text in red (same type of red as this text)

indicates errors in the photos taken before final

assembly instructions were written. These errors will be

adressed in the next version of the assembly manual.

TYPE PART VALUE PCS NOTE

Resistor R11,R12 10R 2

Resistor R5,R10 1K 2

Resistor R13,R14 10K 2

Resistor R1,R9 68K 2

Resistor R2 100K 1

Resistor R3 100R 1

Resistor R4 4. M 1

Diode D2,D3 SB130 2 or 1N5818. Schottky power polarity protection

Capacitor C3,C4,C5,C6,C10,C11 100nF 6 Ceramic X R 2.5mm

Capacitor C2,C9 100pF 2 Ceramic C0G 2.5mm

IC Socket IC1,IC2 8 pin 2

OpAmp IC1,IC2 TL0 2 2 or TL082

LDR1 x2, LDR2 x2 2 pin 4 One for each side of the optocouplers.

Optocoupler LDR1,LDR2 SR2/SR3 2 Silonex NSL-32SR2 or NSL-32SR3 ”vactrol”

Electrolytic C ,C8 2 2mm pin pitch, 5mm dia, 5mm height

Transistor Q1 BC55 B 1

Transistor Q2 BC54 B 1

Trimmer TRIM1 2K 1 Gain range calibration

Jack J1,J2,J3 3.5mm 3 PJ301BM

Rotary Pot. POT1 100K lin 1 CV Att.

Rotary Pot. POT2 22K lin 1 Or 25K lin. Gain

Rotary Pot. POT3 100K log 1 Signal in Att.

Switch SW1 SPDT 1 On-On

LED D1 Orange 1 3mm

LED D4,D5,D6,D Green 4 3mm, LED limiter, other colours may be used.

Power header POWER 10 pin 1 boxed

Knobs Small fluted skirtless cream 3

Screws Black, Pozi M3x6 2 Mounting screws

PCB 1

Faceplate PCB material (FR4) black 1

Power cable Eurorack power cable 1 10pin ↔ 16pin

If you want your Optodist to close better for VCA duties use 10K on

R9. However, doing this will lessen the distortion effect.

Optocoupler

socket

10µF

Assem ly instructions

Empty PCB bottom Optodist 1.0

Empty PCB top Optodist 1.0

Empty PCB bottom & top Optodist 1.1

Step 1

Solder resistors. Resistors are not sensitive to mounting direction.

R1 68K, R 100K, R9 68K

R8 skip this one, R13 10K, R14 10K

R8 is unnecessa y but p esent in all photos, don't solde it at all.

On ve sion 1.1 this is emoved.

R5 1K, R10 1K

R11 10R, R1 10R

R3 100R

R4 4.7M

Step 2

Solder reverse polarity protection diodes. The stripe on the diodes must e on

the same side as indicated in the silk screen.

D SB130, D3 SB130

Step 3

Solder ceramic capacitors. Ceramic capacitors are not sensitive to mounting

direction.

C3 100nF, C4 100nF, C5 100nF, C6 100nF, C10 100nF, C11 100nF

C 100pF, C9 100pF

Step 4

Solder sockets. Match the IC sockets indent (pin 1) with the silk screens.

IC1, IC sockets. IC's will be mounted late .

LDR1, LDR sockets. Not sensitive to mounting di ection. Optocouple s will be mounted late .

Step 5

Solder Electrolytics. Long leg is + (anode).

C7 10µF, C8 10µF

Step 6

Solder transistors. Match the curved side with the silk screen.

Q1 BC557B

Q BC547B

Step 7

Solder trimmer. Only 3 of the 5 holes are used, the extra 2 holes are for fitting

trimmers with different appearence.

TRIM1 2K

Step 8

Solder jacks.

J1, J , J3

Step 9

Remove the nuts and washers from the potentiometers. Cut off the small

metal ta sticking out indicated y a red circle elow and solder them in place.

Please pay attention that POT1, POT2 and POT3 is not placed in a

linear order. The order from left to right (or ottom to top) is POT1,

POT3, POT2.

POT1 100K linea

POT 22K linea o 25K linea

POT3 100K loga ithmic

The following 2 steps (switch and LED's) can e done at the same time if you

wish.

Step 10

Remove the nuts and washers on the switch. The nuts are very similar looking

to the jack nuts ut they are not the same. The jacks nuts will not fit on the

switch ut the switch nuts will fit on the jacks so e careful not to mix them up

with each other.

Mount the switch without soldering it.

Mount the panel in the places shown in the picture a ove. You don't need to

tighten the nuts very hard, use your hands, no tools needed.

If you have Alpha potentiometers like the one on the

left you place one washer under the panel and one

nut over the panel.

The last kits with theese pots were shipped in May

2014 and is long gone y now.

If you have custom potentiometers like the one on the

right you place two washers and one nut under the

panel and one washer and one nut over the panel.

This is what is included in our kits after May 2014.

Now solder the switch in place and remove the panel afterwards.

SW1

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