nystrom Crum Drum User manual

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NYSTRÖM - Crum Drum
Build Document
PLEASE DO NOT LINK TO OR REDISTRIBUTE THIS DOCUMENT WITHOUT PERMISSION FROM THONK
For the most recent version of this document please visit –
https://www.thonk.co.uk/shop/crum-drum
!
All Thonk kits are sold under our standard Terms and Conditions -
http://www.thonk.co.uk/faq/!

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DIY INSTRUCTIONS
This document gives detailed instructions that assume you have purchased a complete Turing
Machine kit from www.thonk.co.uk after April 2016, it also assumes no previous knowledge of
electronics.
To learn to solder try https://www.youtube.com/watch?v=IpkkfK937mU and the Adafruit guide to
excellent soldering – http://bit.ly/1l77tF4
Watch and understand that whole YouTube video! If you’re not achieving the results shown in the
video then you need to buy new tools or seek advice. You will not end up with a working unit
otherwise.
TOOLS REQUIRED
Soldering iron, snipe nose pliers, wire strippers, small flat head screwdriver and diagonal cutters AKA
snips AKA side-cutters. A Digital Multimeter is always helpful for checking for bad solder joints and
continuity. Thonk sell a range of inexpensive tools here - http://bit.ly/1jxqF3n
SOLDER JOINTS
Your solder joints should look like those shown as ‘OK’ below, they should have that neat conical shape
on BOTH sides of the PCB. If they don’t look the same on both sides then stop! Work out why from the
soldering guides linked and don’t continue until you are getting those results.
This isn’t about perfectionism, you are very likely to end up with a destroyed, damaged or defective
unit if you’re not hitting that standard.
This photo is from the Adafruit guide to excellent soldering - http://bit.ly/1l77tF4 and is reproduced
under an Attribution-Sharealike creative commons license - http://creativecommons.org/licenses/by-
sa/3.0/

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This document has hi-res images.
ZOOM IN for a closer look
A schematic can be found on the last
page of this document.
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A A
B B
C C
D D
1
1
2
2
3
3
4
4
5
5
TITLE:
CrumDrum REV: 1.0
Date: 2023-02-05
Sheet: 1/1
Drawn By: albnys
Company: Albert Nystr㈦m
TEENSY4.11
VIN VIN
3.3V 3.3V
23 IO23
22 IO22
21 IO21
20 IO20
19 IO19
18 IO18
17 IO17
16 IO16
15 IO15
14 IO14
13 IO13
41 IO41
40 IO40
39 IO39
38 IO38
37 IO37
36 IO36
35 IO35
34 IO34
33 IO33
G
G
0
IO0
1
IO1
2
IO2
3
IO3
4
IO4
5
IO5
6
IO6
7
IO7
8
IO8
9
IO9
10
IO10
11
IO11
12
IO12
3.3V
3.3V
24
IO24
25
IO25
26
IO26
27
IO27
28
IO28
29
IO29
30
IO30
31
IO31
32
IO32
ON/OFF
ON/OFF
PROGRAM
PROGRAM
3.3VDD
3.3VDD
VBAT
VBAT
5V 5V
D- D-
D+ D+
UDA1334A
VIN 1
3V3 2
GND 3
WSEL 4
DIN 5
BCLK 6
LOUT
7AGND
8ROUT
9
SCLK
10
SF1
11
MUTE
12
SF0
13
PLL
14
DEEM
15
4.7
R1
4.7k
R2
4.7k
R3
4.7k
R4
LED1 LED2 LED3 LED4
GND GND GND GND
2
1
3
OFF
INST TYPE
S1
21
3
STEPS
S2
21
3
+3.3V
+3.3V
+3.3V
Filter
U2
filtPot
filtPot
volPot
swingPot
drivePot
delayPot
reverbPot
freqPot
decayPot
tonePot
tempoPot
volPot Vol
U3 swingPot swing
U4
drivePot drive
U5 delayPot delay
U6 reverbPot reverb
U7
random
U8
randomPot
prob
U9
probPot
tempo
U10
tempoPot
tone
U11
tonePot
decay
U12
decayPotfreqPot freq
U13
instrumentPot instrument
U14
instrumentPot
randomPot
probPot
2.2k
R5
2N3904
Q1
+5V
ClockOut
ClockOut
BTN1
4 3
21
+3.3V
+3.3V
BTN2
4 3
21
+3.3V +3.3V +3.3V
+3.3V+3.3V+3.3V
+3.3V +3.3V +3.3V
+3.3V+3.3V
+3.3V
+3.3V
GND
GND GND GND
GNDGNDGND
GND GND GND
GNDGND
GND
GND
620
R7
GND
2.2k
R8
1N4148
D1
clock in
J1
GND
TIP
RING GND
clock out
J2
GND
TIP
RING GND
GND
220
R9
+5V
+3.3V
+3.3V
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