miniosc's Introduction

MiniOSC

by Benjie Jiao

Resistors are 1/4W, 7.62mm pitch.

1uF and 100uF Capactiors are 5mm radial 2.5mm pitch. The rest of the capacitors are 5mm pitch box-types.

There are two options provided for power connectors. You only have to install one:

6-pin JST Connector - This is what I use for all my personal synth systems and is easier to find where I am.
16-pin (2x8) IDC Connector - Standard Eurorack power connector

The pots I've tested are RV09-types.

Reference	Value	Type	Amount
C1	2.2nF	Capacitor	1
C2,C3	1uF	Capacitor	2
C4,C5	100uF	Capacitor	2
C6-C8	100nF	Capacitor	3
D1,D2	1N4148	Diode	2
D3	5mm LED	LED	1
FM_AMOUNT1	B1M	Potentiometer, RV09	1
J1	1x16 2.54mm Female Pin Header	Pin Header	1
J2	1x16 2.54 Male Pin Header	Pin Header	1
J3-J6	3.5mm Audio Jack	Jack	4
J7	JST Header	Header	1
J8	IDC Header	Header	1
PULSE_WIDTH1, TUNING_COARSE1, TUNING_FINE1	B100K	Potentiometer, RV09	3
Q1	BC558	Transistor	1
Q2	BC548	Transistor	1
R1,R3,R4,R8-10,R12,R14	1OOK	Resistor	8
R2,R6	1M	Resistor	2
R5	1K5	Resistor	1
R7	200K	Resistor	1
R13	33K	Resistor	1
R11,R15	20K	Resistor	1
R16-R18	10K	Resistor	3
SCALE1	B1K	Potentiometer, RV09	1
TH1-TH4	10K NTC	NTC Thermistor	4
U1	TL074	OpAmp	1
U2	CD40106	Hex Inverter Schmitt Trigger	1

Document	Link
Schematics	MiniOSC-ref1.0.pdf
BOM	MiniOSC - BOM.csv

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It's on F.Mask rather than B.SilkS

JLCPCB requires 5mm wide mousebites. It'll give you a warning if you use anything shorter.

Mounting holes should be 7.5mm from the left edge. Current version should still work for setups without fixed mounting holes on the rails.

This is rev 1.1, please close if this has already been addressed.

R14 has the 100K label on the incorrect layer (on the back of the board)
D3's silkscreen is ambiguous, no indication of cathode/anode orientation. The square pad is the only indication
The TL074 silkscreen is very hard to read being placed on top of the U1 label