VCO
VCO is an open source PCB design by nickajeglin: a 2-layer, 37 × 113.9 mm board with 104 components (50 distinct parts). It is built around the OP275, TL072, SSM2212, TL074 and more. Filed under audio.
A collection of easy to solder DIY eurorack PCB's
VCO: ready to build, digikey bom provided, minor rework needed for V1.0, V2.0 ok.
Mult: Super easy first DIY project no surface mount parts. Ready to build, see interactive BOM for parts list, there's only like 3.
Mixer: Update 2019-04-28: prototypes built. I reversed the supply rails on the TL072 in the kicad schematic lol. That means I need to flip the power header, and change some silk around. Let me know if you want V1.0 and I'll email it to you
Built around
Parts list
104 components, 50 distinct parts — part numbers from the project's BOM.
| Qty | Part | Footprint | Refs |
|---|---|---|---|
| 1 | OP275 | SOIC-8_3.9x4.9mm_P1.27mm | U1 |
| 2 | TL072 | SOIC-8_3.9x4.9mm_P1.27mm | U2, U6 |
| 1 | SSM2212 | SOIC-8_3.9x4.9mm_P1.27mm | U3 |
| 1 | TL074 | SOIC-14_3.9x8.7mm_P1.27mm | U4 |
| 1 | LM13700 | SOIC-16_3.9x9.9mm_P1.27mm | U5 |
| 1 | TL071 | SOIC-8_3.9x4.9mm_P1.27mm | U7 |
| 1 | PN4391 | TO-92 | Q1 |
| 1 | SYNC | 3.5mm_tip_switch_thonkiconn | J1 |
| 1 | PWM | 3.5mm_tip_switch_thonkiconn | J2 |
| 1 | LIN | 3.5mm_tip_switch_thonkiconn | J3 |
| 1 | CV1 | 3.5mm_tip_switch_thonkiconn | J4 |
| 1 | CV2 | 3.5mm_tip_switch_thonkiconn | J5 |
| 1 | CV3 | 3.5mm_tip_switch_thonkiconn | J6 |
| 1 | SIN | 3.5mm_tip_switch_thonkiconn | J7 |
| 1 | TRI | 3.5mm_tip_switch_thonkiconn | J8 |
| 1 | RMP | 3.5mm_tip_switch_thonkiconn | J9 |
| 1 | SQR | 3.5mm_tip_switch_thonkiconn | J10 |
| 1 | Conn_02x05_Odd_Even | IDC-Header_2x05_P2.54mm_Vertical | PWR1 |
| 3 | 100k lin | Potentiometer_Thonk_Alpha_9mm_Vertical | RV2, RV3, RV39 |
| 2 | 10K | Potentiometer_Bourns_3296W_Vertical | RV5, RV7 |
Show 30 more
| Qty | Part | Footprint | Refs |
|---|---|---|---|
| 3 | 100K | Potentiometer_Bourns_3296W_Vertical | RV11, RV60, RV64 |
| 1 | 100 | Potentiometer_Bourns_3296W_Vertical | RV16 |
| 1 | 1M | Potentiometer_Bourns_3296W_Vertical | RV59 |
| 8 | 1N914 | D_1206_3216Metric_Pad1.42x1.75mm_HandSolder | D1, D2, D3, D4, D5, D6, D7, D8 |
| 3 | 0.1uF | C_1206_3216Metric_Pad1.42x1.75mm_HandSolder | C1, C2, C8 |
| 3 | 100pF | C_1206_3216Metric_Pad1.42x1.75mm_HandSolder | C3, C17, C19 |
| 1 | 10pF | C_1206_3216Metric_Pad1.42x1.75mm_HandSolder | C4 |
| 1 | 0.001uF | C_1206_3216Metric_Pad1.42x1.75mm_HandSolder | C5 |
| 1 | 0.005uF mica, polycarb, or polysty | C_1206_3216Metric_Pad1.42x1.75mm_HandSolder | C6 |
| 2 | 10uF 25V electro | CP_Elec_5x4.5 | C7, C10 |
| 2 | 1uF 25V tant | C_1206_3216Metric_Pad1.42x1.75mm_HandSolder | C12, C13 |
| 1 | 0.002uF | C_1206_3216Metric_Pad1.42x1.75mm_HandSolder | C14 |
| 2 | .1uF | C_1206_3216Metric_Pad1.42x1.75mm_HandSolder | C15, C16 |
| 1 | 4.7pF | C_1206_3216Metric_Pad1.42x1.75mm_HandSolder | C18 |
| 11 | 10K | R_1206_3216Metric_Pad1.42x1.75mm_HandSolder | R1, R12, R13, R17, R25, R32, R35, R40 +3 |
| 11 | 100k | R_1206_3216Metric_Pad1.42x1.75mm_HandSolder | R6, R10, R15, R18, R23, R29, R31, R44 +3 |
| 5 | 1M | R_1206_3216Metric_Pad1.42x1.75mm_HandSolder | R8, R28, R30, R45, R69 |
| 3 | 4.7K | R_1206_3216Metric_Pad1.42x1.75mm_HandSolder | R9, R36, R52 |
| 3 | 20K | R_1206_3216Metric_Pad1.42x1.75mm_HandSolder | R14, R21, R48 |
| 1 | 475 | R_1206_3216Metric_Pad1.42x1.75mm_HandSolder | R19 |
| 2 | 47K | R_1206_3216Metric_Pad1.42x1.75mm_HandSolder | R20, R65 |
| 5 | 1K | R_1206_3216Metric_Pad1.42x1.75mm_HandSolder | R22, R26, R34, R49, R51 |
| 1 | 2K | R_Axial_DIN0207_L6.3mm_D2.5mm_P10.16mm_Horizontal | R24 |
| 1 | 3K | R_1206_3216Metric_Pad1.42x1.75mm_HandSolder | R41 |
| 1 | 2K | R_1206_3216Metric_Pad1.42x1.75mm_HandSolder | R46 |
| 1 | 130K | R_1206_3216Metric_Pad1.42x1.75mm_HandSolder | R53 |
| 2 | 200k | R_1206_3216Metric_Pad1.42x1.75mm_HandSolder | R56, R57 |
| 1 | 470K | R_1206_3216Metric_Pad1.42x1.75mm_HandSolder | R61 |
| 1 | 10M | R_1206_3216Metric_Pad1.42x1.75mm_HandSolder | R68 |
| 1 | 18K | R_1206_3216Metric_Pad1.42x1.75mm_HandSolder | R70 |
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