Synbal
About the Synbal PCB
Synbal is an open source PCB design by Bad-Dog-Designs, published on GitHub under the GPL-2.0 license. It is a 2-layer board measuring 71 × 108 mm, with 105 components from 52 distinct parts.
Other key parts include the LM324, 40106, 4070, LM741 and LM13700. By type, the board carries 50 resistors, 22 capacitors, 11 connectors, 6 ICs, 3 diodes and 2 switches.
It belongs with the audio designs in this gallery.
From the project
KiCad project files for the Ospray-8 Percussion synth
Main components on the Synbal
Synbal bill of materials (BOM)
105 components, 52 distinct parts — part numbers from the project's BOM.
| Qty | Part | Footprint | Refs |
|---|---|---|---|
| 1 | LM324 | SOIC-14_3.9x8.7mm_P1.27mm | U1 |
| 1 | 40106 | SO-14_3.9x8.65mm_P1.27mm | U2 |
| 1 | 4070 | SO-14_3.9x8.65mm_P1.27mm | U3 |
| 1 | LM741 | SOIC-8_3.9x4.9mm_P1.27mm | U4 |
| 2 | LM13700 | SOIC-16_3.9x9.9mm_P1.27mm | U5, U6 |
| 1 | 2SC828 | TO-92_Inline | Q2 |
| 4 | SMT pads | Bus Connector | J1, J9, J10, J11 |
| 1 | Trigger | Jack_3.5mm_QingPu_WQP-PJ398SM_Vertical_CircularHoles | J2 |
| 1 | Mono Out | Jack_3.5mm_QingPu_WQP-PJ398SM_Vertical_CircularHoles | J3 |
| 1 | Power In | PinHeader_1x03_P2.54mm_Horizontal | J4 |
| 1 | Power Out | PinHeader_1x03_P2.54mm_Horizontal | J5 |
| 1 | Audio In | PinHeader_1x03_P2.54mm_Horizontal | J6 |
| 1 | Audio Out | PinHeader_1x03_P2.54mm_Horizontal | J7 |
| 1 | Remote Trig | PinHeader_1x02_P2.54mm_Vertical | J8 |
| 1 | TestPoint | TestPoint_Keystone_5010-5014_Multipurpose | +6v |
| 1 | Tune 10k | Potentiometer_Alps_RK09K_Single_Vertical | RV1 |
| 1 | Sensitivity 47k | Potentiometer_Piher_PT-6-V_Vertical | RV2 |
| 1 | Mix 100k | Potentiometer_Alps_RK09K_Single_Vertical | RV3 |
| 1 | Decay 1M | Potentiometer_Alps_RK09K_Single_Vertical | RV4 |
| 1 | Resonance 470k | Potentiometer_Alps_RK09K_Single_Vertical | RV5 |
Show 32 more
| Qty | Part | Footprint | Refs |
|---|---|---|---|
| 1 | Sweep 10k | Potentiometer_Alps_RK09K_Single_Vertical | RV6 |
| 1 | Frequency 10k | Potentiometer_Alps_RK09K_Single_Vertical | RV7 |
| 1 | Volume 47k | Potentiometer_Alps_RK09K_Single_Vertical | RV8 |
| 1 | Pan 100k | Potentiometer_Alps_RK09K_Single_Vertical | RV9 |
| 1 | Manual | SW_PUSH_6mm_H5mm | SW1 |
| 1 | Filter | 1P3WSW | SW2 |
| 2 | 1N4148 | D_MiniMELF | D1, D3 |
| 1 | LED | LED_D3.0mm | D2 |
| 1 | 220UF 220uf | CP_Radial_D8.0mm_P3.50mm | C1 |
| 2 | 4U7 4u7 | CP_Radial_D4.0mm_P1.50mm | C2, C9 |
| 7 | 10N 10n | C_Disc_D7.0mm_W2.5mm_P5.00mm | C3, C4, C5, C6, C7, C8, C14 |
| 1 | 22NF 22nF | C_Disc_D7.0mm_W2.5mm_P5.00mm | C10 |
| 2 | 100N 100n | C_Disc_D7.0mm_W2.5mm_P5.00mm | C11, C12 |
| 1 | 2U2 2u2 | CP_Radial_D4.0mm_P1.50mm | C13 |
| 2 | 1UF 1uF | CP_Radial_D4.0mm_P1.50mm | C15, C18 |
| 2 | 1n | C_Disc_D7.0mm_W2.5mm_P5.00mm | C16, C17 |
| 4 | 100NF 100nF | C_0805_2012Metric | C21, C22, C23, C24 |
| 5 | 47K 47k | R_1206_3216Metric | R1, R2, R14, R15, R21 |
| 8 | 100K 100k | R_1206_3216Metric | R3, R10, R11, R13, R31, R34, R35, R50 |
| 2 | 220K 220k | R_1206_3216Metric | R4, R38 |
| 1 | 330K 330k | R_1206_3216Metric | R5 |
| 1 | 390K 390k | R_1206_3216Metric | R6 |
| 1 | 470K 470k | R_1206_3216Metric | R7 |
| 1 | 560K 560k | R_1206_3216Metric | R8 |
| 7 | 10K 10k | R_1206_3216Metric | R9, R18, R19, R20, R22, R25, R29 |
| 4 | 4K7 4k7 | R_1206_3216Metric | R12, R23, R39, R44 |
| 1 | 150K 150k | R_1206_3216Metric | R16 |
| 2 | 2M2 | R_1206_3216Metric | R17, R27 |
| 1 | 680R | R_1206_3216Metric | R24 |
| 5 | 22K 22k | R_1206_3216Metric | R26, R32, R33, R37, R41 |
| 7 | 1k | R_1206_3216Metric | R28, R30, R36, R40, R42, R43, R47 |
| 4 | 68K 68k | R_1206_3216Metric | R45, R46, R48, R49 |
Synbal design files
The KiCad project lives in the Bad-Dog-Designs/Ospray-8 repository on GitHub; these links point at the commit this page was built from.
- LayoutSynbal/Synbal.kicad_pcb
- SchematicSynbal/Synbal.kicad_sch
- BOMSynbal/production/bom.csv
Synbal: common questions
How big is the Synbal PCB?
The Synbal measures 71 × 108 mm, has 2 copper layers and is 1.6 mm thick.
How many components are on the Synbal?
105 components, from 52 distinct parts, with part numbers taken from the project's own BOM. The full bill of materials is listed on this page.
Where can I download the Synbal design files?
From the Bad-Dog-Designs/Ospray-8 repository on GitHub, which has the KiCad layout, the schematic and the BOM; the links under Design files point to each one.
Can I use the Synbal design in my own project?
Yes, under the terms of its GPL-2.0 license, which Bad-Dog-Designs chose for the repository.
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