ER-BEZIER-CV

Features

• From HAGIWO Bezier Random CV Generator
• Built from existing Land Boards cards
  • ER-PROTO-02 Front panel
  • ER-PROTO-02 Controls cards
  • Partly populated ER-MOZZI-DB card
• Arduino Nano

NANO Pinout

HAGIWO Schematic

HAGIWO Front Panel

Front Panel Pots/Jacks

• 4 pots, 3 jacks

RV1 - Freq

• Arduino Analog 0

RV2 - Curve

• Arduino Analog 1

RV3 - Sigma

• Arduino Analog 2

RV4 - Level

• Arduino Analog 3

J3 - GATE Out

• A5 used as digital output

J4 - Freq CV In

• Arduino Analog 7

J5 - Curve CV In

• Arduino Analog 6

J6 - PWM Output

• Arduino Digital D10

Card/Card Connectors

J7 - Jacks Connector

J8 - Pots Connector

Other Connectors

Eurorack Connector

• 2x5, uses +12V only

Software

• Pot/CV Check - Read Analog inputs, write to monitor
• ERBEZIERCV_R1 - Original has timer overflows causing hangs
• ERBEZIERCV_R2 - Fixed timer overflows which were causing hangs, adds GATE output on J3
• RANDOM_CV_R1 - Random CV generator
  • RV1 = Gate on time
  • RV2 = Gate off time
  • RV3 = Minimum output voltage
  • RV4 = Maximum output voltage
• RANDOM_CV_R2 - Random CV generator
  • RV1 = Gate on time (20 notes/sec to 4 sec/note)
  • RV2 = Gate on percentage (-100%)
  • RV3 = Minimum output voltage
  • RV4 = Maximum output voltage

Parts List

ER-PROTO-CTLS

• Install jumpers RV1-RV4 PWR/GND (J10, J11, J13, J14, J16, J17, J19, J20)
  • Solder blobs or tiny jumpers
• R1-R4 = 1K
• R7, R9, R15, R17 = 0
• RV1-RV4 = B100K
• J3-J6 = PJ398SM
• J2, J6 reversed on schematics (on ER-MOZZI-DB card)
  • Add jumper J7-4 (signal: J2-T) to J7-8 (signal: J6-T)

ER-MOZZI-DB

Find	Qty	Ref Des	Part Number		Find	Qty	Ref Des	Part Number
1	2	R5, R12	10K		8	7	C2, C3, C5, C6, C11, C13, C14	0.1uF
2	2	R6, R13	100K		9	1	C7	10uF
3	1	R9	470		10	1	C8	47uF
4	1	R14	0		11	1	C15	4.7uF (mind polarity GND up)
5	1	R15	10		12	1	J7	HEADER, 2x8
6	7	D5-D8, D9-D11	BAT41		13	1	J8	HEADER, 2x10
7	1	1K	R7		14	1	J9	CONN, IDC, 2X5
					15	1	A1	Arduino_Nano_v3.x