Reverselandfill Noise Technical manual

Noise Oscillator Build Document. V6 Standalone 9v
The Noise! Synthesizer is a CMOS IC based instrument.
The synth has 4 squarewave oscillators that modulate each other and o throu ht a clock divider.
After that, the separate divider outputs are mixed and shaped to ether.
Start with the Resistors:
The one 10R resistor has the color code: 'brown-black-black- old-brown'.
It is used at the power input as a fuse.
Bend the le s of the resistor 90 de rees and place the 10R resistor at the R1 location on the PCB.
Solder the resistor and cut off the le s with a sidecutter.
The three 1K resistors have the color code: 'brown-black-red'.
These parts act as output protectors.
Place the resistors at R2, R and R4
Solder and cut the le s.
R5 to R8 can be skipped, they are for CV input (eurorack)
Starve is a modification option.
Look at the end of this document for more info!
Connect the middle and ri ht hole of Starve to ether to bypass this option.
Use a snipped-off le of a resistor. Bend the le in a U shape and solder.
If you skip this step, the module will receive no power!!
IC sockets:
Take the tube or foam with the two IC sockets and the IC's. There is one with 16 pins and one with 14 pins!
These IC-sockets are to make the placement (and possible removal) of the IC's easier.
Take out the two IC-sockets. Attention! These sockets have a direction. See the semi-circle ap?
On the PCB you can see this markin as well. Place the 16-pin IC socket in IC2.
Flip over the PCB and solder two le s, on in the upper row, one in the lower row, dia onally from each other.
Flip the PCB back to the other side to check if the IC-socket is flat to the PCB.

If not, push the socket li htly to the PCB and reheat the two solderd le s. It should click to the PCB.
Place the 14 pin IC socket in IC1 and use the same method as before to solder it in.
Solder all remainin le s.
Capacitors!
There are a lot of capacitors in the kit.
They determine the frequency ran e of the oscillators and stabilise the power and outputs.
We start with the three oran e disk-shaped capacitors.
C1, C2, C4 are 100nF (104)
The 100pF oes in C . This is a sli htly smaller oran e disk with the code "101".
C5 = 1uF . This part is a blue blob with lon le s.
Now for the bigger capacitors:
These parts have a polarity. The lon le is the PLUS, The short le is MINUS.
The value of these components is printed on the side as well.
Start with the one lar er 47uF.
(take care to et the ri ht one, there are also four 4.7uF capacitors!)
Place the one 47uF capacitors in C7. Lon le oes into the PLUS!!
Now we do the four 4.7uF. These o in C6, C8, C9 and C10.
The Potentiometers:
These parts are variable resistors. With these you can adjust the frequency of the oscillators.
You have four of these.
P1 = B100K
P2 = B100K
P = B100K
P4 = B100K
Solder one le , check if the potmeters are strai ht in.Reheat to ali ned them correctly, then solder the rest.
IC's:
Take the small piece of foam with the two IC's.
CD4040 (clock divider) en CD409 (quad NAND)
The IC's are the heart of the noise synthesizer.
IC2: CD4040 divides the pitch of the oscillators
IC3: CD409 makes the four oscillators
CD4040 has 16 le s, CD409 has 14 le s.
Bend the le s so that they are 90 de rees downward. (use your fin ers or a flat surface to bend them all at once)
Take care that the semi-circle ap corresponds with the markin on the PCB. (and the sockets)
Fit the IC's carefully in the IC holders.
Push them in carefully but firmly.

Power:
Solder the 9v battery cable to the +9v and GND hole.
The RED wire oes into the +9v, the BLACK wire into the GND hole.
Note: all GND connections on the PCB have the GND markin as shown above.
ront panel:
Attach the PCB to the frontpanel with the potmeters. Use the rin s + nuts. Fasten the nuts.
Also attach the jack socket.
Now the OUTPUTS:
Cut 2 wires of about 15 cm and strip the ends.
Connect OUT1 to the TIP of the jack socket, connect the GND to the GROUND of the socket.
Note: GND is the slanted side of the jack socket.
Knobs:
Turn the four potmeters all the way to the left (CCW) and fit the knobs on.
Push them firmly in, while supportin the back of the potmeter.
Now you can test if it works!
First test OUTPUT1. Do you hear Noise? Great!!
Troubleshooting:
If the synth does not work, DON'T PANIC!
Check all solder connections, reflow if neccesary. Check the orientation of the capacitors and IC's.
Did you brid e the Starve holes? (else the module ets no power!!)

Modifications:
Extra outputs:
The noise PCB has a total of 3 outputs. Connect jacks to OUT2 & OUT3 for extra variations in the sound
OUT2 bypasses the clock divider and has a more bleepy sound. OUT3 is a patchable output. See in the pictures
below on how to patch this up. You can solder wires directly, make a pinheader patchbay or even a separate
panel with patchpoints on it.
Patchbay Panel:
To make the patchbay accessable , you can make a 'patchbay panel'.
Use the pincables or any other cool way (such as banana plu s, touch points, switches) to connect the 12
" reen" outputs to the 3 "yellow" inputs.
The 12 outputs come from the clock divider, they divide the audio by 2, 4, 8, 16 and so on.
S1 = Starve connection.
Connect the three holes with a 10k potentiometer.
Now you can adjust the amount of volta e flowin in the circuit.
This has an interestin effect on the audio!
Capacitor values = noise ranges.
Experiment with other capacitor values for C3,C4, C5 and C6 for other noise ran es / timbres.
For C3, try 10pf to 1nF, for C4 & C5, try 100nf to 1uF. For C6, try 1uF to 10 uF.
CV inputs:
To add CV inputs (to control the 4 pitches of the oscillators with external volta es),
solder in four 1m resistors, four 2n3904 transistors and four zener 9.1v diodes.
Use the 4x CV inputs to connect 4x jacks. Don't for et to connect the GND as well.
Have fun with your Noise! Synthesizer!!! :)
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