vpme.de ZeroScope Manual

ZeroScope by vpme.de / av500 https://www.muffwiggler.com/forum/viewtopic.php?t=157649 – BOM and build guide, v1.3
Qty
Value
Device
Package
Parts
Description
1
330R
R0805
R0805
R12
RESISTOR (1)
1
1.5k
R0805
R0805
R13
RESISTOR
2
10k
R0805
R0805
R8, R14
RESISTOR (1)
2
33k
R0805
R0805
R2, R4
RESISTOR, 1%
5
100k
R0805
R0805
R5, R6, R7, R15, R16
RESISTOR, 1%
2
200k
R0805
R0805
R1, R3
RESISTOR, 1%
1
1M
R0805
R0805
R9
RESISTOR
2
22p
C0805
C0805
C2, C4
CAPACITOR, ceramic C0G
5
100n
C0805
C0805
C1, C6, C9, C26, C27, C31
CAPACITOR, ceramic (1)(6)
1
1u
C0805
C0805
C3
CAPACITOR, ceramic
3
10u
C0805
C0805
C10, C25, C28
CAPACITOR, ceramic
2
1N5817
DIODE-DO214AC
DO214AC
D1, D2, (D3 only needed to power from debug header)
30V Schottky diode (2)
1
MMBT3904
MMBT3904
SOT23
T1
NPN Transistor, alternatively 2N2222
3
PG331
BLM21PG331
L0805
L1, L2, L3
EMI Suppression Filter BLM21 by Murata
1
AMS1117-3.3
AMS1117-3V3
SOT223
IC1
1A 3.3V Low Dropout (LDO) Regulator
1
LM4040-2.5
LM4040AIM3-2.5
SOT23
IC5
2.5V SHUNT VOLTAGE REFERENCE
1
MCP602-I/SN
MCP602-I/SN
SO08
IC2
OP AMP, low voltage, rail to rail, dual (3)
1
STM32F031F6
STM32F031F6
TSSOP20
IC7
48MHz Cortex M0 CPU (1)
1
OLED
OLED128x64
1X07
OLED
0.96“ OLED 128x64, 7-pin SPI version (5)
1
2x3
PINHD-2X3SMT
2X03_SMT
DEBUG
PIN HEADER MALE, SMT (4)
1
2x8
PINHD-2X8SMT
2X08_SMT
POWER
PIN HEADER MALE, SMT (4)
1
2x5
PINHD-2X5SMT
2X05_SMT
JP1
PIN HEADER MALE, SMT (4)
0
(LP2985-3.3)
LP2985
SOT23-5L
IC4 (do not install)
LP2985AIM5-3.3/NOPB
0
(10n)
C0805
C0805
C5 (do not install)
CAPACITOR
0
(10u)
C0805
C0805
C8 (do not install)
CAPACITOR
ZeroScope Jacks PCB:
1
2x5
PINHD-2X5
2X05
JP1
PIN HEADER Female 7mm (4)
2
EC12E_SW
EC12E_SW
EC12E_SW
E1, E2
ALPS Encoder EC12E series with switch or Bourns
PEC11R-4220F-S0024, 20mm shaft length
6
WQP-PJ301M
THONKICONN
WQP-PJ301
M
IN1, IN2, INT, OUT1, OUT2, OUTT
THONKICON jack
(1) R12, R14, C31 and IC7 STM32F031F6 already populated on PCB
(2) alternatives: 1N5817, LL5817 MELF, SM5817, SS12, also higher rated parts like *5818, *5819, SS13, SS14
(3) you can also use MCP6002, note that fake MCP6002 from China have been encountered by me and other diy builders
(4) SMT headers delivered with PCB set
(5) v1.2/v1.3 PCB has also pads for a 6-pin SPI OLED, but there are two different versions available!
the supported pinout is: VCC, GND, CLK, MOSI, /CS, D/C - THIS IS UNTESTED, TRY AT YOUR OWN RISK
(6) in very rare cases the ZeroScope might not boot up correctly depending on the power supply used, then increase C6 from 100nF to 1uF.

ZeroScope by vpme.de / av500 https://www.muffwiggler.com/forum/viewtopic.php?t=157649 – BOM and build guide, v1.3

ZeroScope by vpme.de / av500 https://www.muffwiggler.com/forum/viewtopic.php?t=157649 – BOM and build guide, v1.3

ZeroScope by vpme.de / av500 https://www.muffwiggler.com/forum/viewtopic.php?t=157649 – BOM and build guide, v1.3
after soldering the PCB, here are all the parts needed for assembly:

ZeroScope by vpme.de / av500 https://www.muffwiggler.com/forum/viewtopic.php?t=157649 – BOM and build guide, v1.3
solder the SMT headers, make sure the 10pin header JP1 is centered exactly on the pads, otherwise the jack PCB will not align
with the front panel PCB - if in doubt solder 2 opposite pins only and check alignment, then solder the rest later

ZeroScope by vpme.de / av500 https://www.muffwiggler.com/forum/viewtopic.php?t=157649 – BOM and build guide, v1.3
insert encoders and jacks into the PCB, add nylon washers

ZeroScope by vpme.de / av500 https://www.muffwiggler.com/forum/viewtopic.php?t=157649 – BOM and build guide, v1.3
slide front panel PCB onto the jacks and encoders and clamp PCBs together with e.g. a rubber band.
check alignment and solder the 10 pin header and the jacks, DO NOT solder the encoders now

ZeroScope by vpme.de / av500 https://www.muffwiggler.com/forum/viewtopic.php?t=157649 – BOM and build guide, v1.3
install nuts on 3.5mm jacks. pull the encoders forward so that they sit flush behind the front panel and install the nuts.
then solder the encoder pins on the back - note they will just clear the PCB holes

ZeroScope by vpme.de / av500 https://www.muffwiggler.com/forum/viewtopic.php?t=157649 – BOM and build guide, v1.3
solder the OLED at the middle pin only and check that it is square and centered, then solder the remaining pins. to install the
acrylic cover please remove the protective film, then stack them as pictured and use the provided screws.
SWITCHING ENCODER ROTATION
Depending on what rotary encoder you have used, the rotation direction might be swapped. “Normally” turning the upper
encoder clockwise should decrease time/div and turning the lower encoder clockwise should decrease V/div.  Press and hold the
upper OR the lower button when powering up the module to change the encoder rotation direction between “NORMAL” and
“SWAPPED”, this selection will be saved permanently.