Reverselandfill Noise Technical manual

Noise Oscillator Build Document. V.5d - 9v - English
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.
Then the si nal is routed throu h a pseudo rin mod.
Start with the Resistors:
The one 10R resistor has the color code: 'brown-black-black'.
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 R , R3 and R4
Solder and cut the le s.
R5 to R8 are four 1M resistors.
R9 can be skipped, It is a volta e divider with R3, to reduce the volume of OUT2
Starve a modification option.
Look at the end of this document for more info!
Connect the two holes 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!!
Diodes:
There are four zener diodes. These make sure that the CV input volta e cannot be hi her than 9.1 volt.

Doides have a important orientation, marked with a black stripe. This stripe is white on the PCB.
Place the four diodes in D1, D , D3 and D4.
IC sockets
Take the tube or foam with the three IC sockets and the IC's. There is one with 16 pins and two 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 half moon-shaped ap?
On the PCB you can see this markin as well. Place the 16-pin IC socket in IC .
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 to the PCB and reheat the two solderd le s. It should click to the PCB.
Place the 14 pin IC sockets in IC1 and IC3 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, stabilise the power and outputs.
We start with the four small li ht yellow capacitors.
C1, C , C5 en C6 are 100nF (.1K63)
C3 = 680pF (you can also use a 100pF)
C4 = 220nF / 100nF (.22J63)
Now for the bi er capacitors:
These parts have a polarity. The lon le is the PLUS, The short le is MINUS.
There is also a MINUS symbol printed on the side.
The value of these components is printed on the side as well.
Start with the one 47uF.
(take care to et the ri ht one, there are also four 4.7uF capacitors!)
Place the one 47uF capacitors in C11. Lon le oes into the PLUS!!
Now we do the three 4.7uF. These o in C7, C8, C9 and C10.
Transistoren
Place the four transistors in Q1, Q , Q3 and Q4.
These parts are heat sensitive, so make sure that you don't overheat them.

Solder one le at a time and let it cool off, then solder the rest.
The Potentiometers.
These parts are variable resistors. With these you can adjust the frequencies.
You have four of these. One of these has a different value, so pay attention!
The value is printed on top.
P1 = B100K
P = B50K
P3 = A100K
P4 = B100K
Solder one le , check if the potmeter is strai ht in, then solder the rest.
IC's
Take the small piece of foam with the three IC's.
CD4070 (XOR), CD4040 (clock divider) en CD4093 (quad NAND)
The IC's are the heart of the noise synthesizer.
The CD4093 makes the four oscillators, the CD4040 divides the pitch of the oscillators
The CD4070 is a pseudo rin modulator and ives OUTPUT2 a metalic character.
CD4040 has 16 le s, CD4070 and CD4093 have 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 half-moon ap corresponds with the markin on the PCB. (and the sockets)
Fit the IC's carefully in the IC holders. The CD4070 oes in IC1, the CD4040 in IC and CD4093 in IC3
Push them in firmly.
Power
Place the 10 pin eurorack connector. The open side oes up, with "10" markin on the PCB .
Now the OUTPUTS!
Take the 7 jack sockets.

Connect OUT1 to the TIP of the jack socket, connect the GND to the GROUND of the socket.
Do the same for the OUT2 and OUT3 sockets. You can interconnect the GROUNDS.
The CV inputs are located on the left side of the PCB. Connect them in the same way as the outputs.
Connect the GROUNDS of the CV jacks to the GROUNDS of the output jacks.
Outputs:
The pcb has 3 outputs.
What you will need for OUT2 and OUT3:
Solder a 12pin header on the X1_noisebay and 5pin headers on the Y1 and the Y2 patchbays.
Patch a few pincables from the X1_noisebay to the Y2_patchbay. Now you will have noise comin out of OUT2
The Y2 patchbay oes to the CD4070 'pseudo rin mod' IC. The noise has a different character.
Patch some wires to Y1 as well. Y1 oes to OUT3. Listen to OUTPUT3!
The Y1 patchbay oes directly to the OUT3. by patchin to this output, you can make noise pitch chan es and
also route it as a random modulation output (use the lar e divisions)
The X1_noisebay has 12 outputs.
Output scale / divided by 4096, 048, 10 4, 51 , 56, 1 8, 64, 3 , 16, 8, 4,
The Y1_patchbay is connected internally, so it does not matter where you patch the pincables.
Note: The potentiometers are LEFT orientated. (noise a ainst hate!)

Troubleshooting:
Check all solderconnections, reflow if neccesary.
Check the orientation of the capacitors and IC's.
The red battery cable must be connected to the +9v!
Did you connect the S1? (else the module ets no volta e!!)
Modifications:
S1 = Starve connection.
Connect the two holes with 2 le s of a 10k potentiometer.
(use the left and middle pins of the potentiometer)
Connect the ri ht pin to GND
Now you can adjust the amount of volta e.
This has an interestin effect on the audio!
Z1 = bypassed output.
This extra output comes directly from the 4 oscillators, bypassin the rest
You can connect this output to the Y1_Patchbay, but only if nothin else is plu ed in.
Use OUTPUT3 to hear the results
(else no audio will come throu h)
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
X1_patchbay outputs to the Y1 and Y2_patchbay inputs.
Have fun with your Noise! Synthesizer!!! :)
Martijn Verhallen
reverse.landfill@ mail.com
www.reverselandfill.or