Important Links
Eurorack Version:
Assembly Instructions
9V Version:
Assembly Instructions
Bill of Materials
Schematic
Capacitor and Resistor Lookup Guide
9-Volt Dirt Filter 2.0 Assembly Instructions
If your PCB says “2.0” in the corner, use these instructions.
If your PCB says “2.2” in the corner, CLICK HERE.
If you are looking for the Eurorack version of the DIRT filter, CLICK HERE FOR VERSION 2.2
Thank you for purchasing your 9-Volt DIRT filter Kit, please follow the instructions to ensure that you have a fully functioning unit. This kit has some ‘no pop’ parts (meaning the PCB calls out for a part, but you don’t populate it), so please follow the BOM and these instructions and don’t populate from the PCB alone. Let’s get started!
9-Volt DIRT filter Kit 3.5mm jacks
9-Volt DIRT filter 1/4″ jacks
RESISTORS & DIODES
First, start by populating the resistors and the diode, as shown below, then turn over on a firm surface to solder then clip your leads.
DIRT Filter Resistors and Diode
SOCKET AND IC
Place the IC Socket in place by aligning the notch with the notch graphic on the PCB Silk Screen
DIRT Filter Socket
Now, place the IC in place, make sure you do not bend the pins when pressing down.
DIRT Filter Socket and IC
CAPACITORS
Place the capacitors in place and solder and clip leads. Make sure you orient the electrolytic capacitors in correctly. The longer lead needs to be inserted into the hole that has the “+” marking near it.
DIRT Filter Capacitors
TRANSISTORS
Add the two transistors as shown below by aligning the flat side of the transistor with the flat side of the graphic on the PCB silk screen. Turn over, solder and clip leads.
DIRT Filter Transistors
VOTAGE REGULATOR JUMPER
IMPORTANT!
For the 9-VOLT version of the Dirt filter, you will not need the 5V voltage regulator, BUT we still need power to flow to the circuit. Take a spare resistor lead clipping and insert it into pins 1 and 3 of on the “78L05ACZ” silk screen area on the PCB. Pins 1 and 3 are the two outer-most holes. Ignore the center hole.
DIRT Filter 5V Voltage Regulator Jump
POTENTIOMETERS
First trim the alignment nub off the pots.
Don’t forget to cut the nubs on the potentiometers.
Next, cut some wire to your desired length and solder the wires to the pots and PCB as shown below.
DIRT Filter Potentiometers
JACKS
You have two options when purchasing your 9-Volt DIRT filter kit, which are 3.5mm (1/8″) or 1/4″. Follow the diagram that fits your kit.
DIRT Filter 3.5mm Jacks
DIRT filter 1/4″ Jacks
DC JACK or 9V BATTERY SNAP
The 9-Volt DIRT filter can be powered by a 9V battery or a DC jack. Follow the instructions below that suit your needs best. Your kit will come with both options.
The 9V battery option is obvious and easy, just connect the red wire through the “+” hole on the PCB silk screen and the black to the “-“. Now solder in place and clip your leads.
DIRT Filter 9V Battery Snap
When using the DC jack with a 9V CENTER NEGATIVE power adapter (common BOSS or ONE-SPOT style adapter), please follow the instructions below. If using a CENTER POSITIVE, reverse these instructions. You will not have color coded wire in your kit, the colors on here are just to make the instructions easier. Solder two wires as shown below.
DIRT Filter CENTER NEGATIVE DC Jack wiring
With these colors of wire being used, insert and solder the red wire to the “+” hole on the PCB in the “9V battery” area and the green to the “-“
DIRT filter CENTER NEGATIVE DC Jack Wiring #2
CONGRATS! You are now done with your project and can test the unit. If you have any questions or need help debugging, please first refer to our troubleshooting guide BY CLICKING HERE. If this gets you nowhere, please contact us by email for support. Thank you again for purchasing your kit from Synthrotek!
MAKE SOME DIRTY NOISE!