Polykit X1 Monosynth
About the Polykit X1 Monosynth PCB
Polykit X1 Monosynth is an open source PCB design by polykit, published on GitHub. It is a 2-layer board measuring 200 × 100 mm, with 147 components from 79 distinct parts.
Other key parts include the MC78M12_TO252, MC79M12_TO252, L78L05_SO8, L79L05_SO8 and TL074. By type, the board carries 54 resistors, 29 connectors, 15 diodes, 14 capacitors, 9 ICs and 7 switches.
It belongs with the audio designs in this gallery.
From the project
The Polykit X1 is a DIY semi-modular, analog, patchable synthesizer
This repository contains schematics, PCB layout files and front panel for an analog, semi modular, patchable synthesizer. It is an interface that works in conjunction with my voice card https://github.com/polykit/polykit-x-voice-card
a VCO with saw, pulse and triangle signal an envelope generator a multimode filter with 8 different filter responses an external input * and a panning stereo output
Main components on the Polykit X1 Monosynth
Polykit X1 Monosynth bill of materials (BOM)
147 components, 79 distinct parts — part numbers from the project's BOM.
| Qty | Part | Footprint | Refs |
|---|---|---|---|
| 1 | MC78M12_TO252 | TO-252-2 | U1 |
| 1 | MC79M12_TO252 | TO-252-2 | U2 |
| 1 | L78L05_SO8 | SOIC-8_3.9x4.9mm_P1.27mm | U3 |
| 1 | L79L05_SO8 | SOIC-8_3.9x4.9mm_P1.27mm | U4 |
| 4 | TL074 | SO-14_3.9x8.65mm_P1.27mm | U5, U6, U7, U8 |
| 1 | TL072 | SO-8_3.9x4.9mm_P1.27mm | U9 |
| 2 | BC847 | SOT-23 | Q1, Q3 |
| 1 | BC857 | SOT-23 | Q2 |
| 1 | AUDIOJACK2_SWITCHT OUT LEFT | Jack_3.5mm_QingPu_WQP-PJ398SM_Vertical_CircularHoles | J1 |
| 1 | AUDIOJACK2_SWITCHT OUT RIGHT | Jack_3.5mm_QingPu_WQP-PJ398SM_Vertical_CircularHoles | J2 |
| 1 | AUDIOJACK2_SWITCHT ADSR_OUT | Jack_3.5mm_QingPu_WQP-PJ398SM_Vertical_CircularHoles | J3 |
| 1 | AUDIOJACK2_SWITCHT GATE | Jack_3.5mm_QingPu_WQP-PJ398SM_Vertical_CircularHoles | J4 |
| 1 | AUDIOJACK2_SWITCHT TRIGGER | Jack_3.5mm_QingPu_WQP-PJ398SM_Vertical_CircularHoles | J5 |
| 1 | CONN_01X36 Conn_01x36 | PinSocket_1x36_P2.54mm_Vertical | J6 |
| 1 | 12V AC | BarrelJack_Horizontal | J7 |
| 1 | AUDIOJACK2_SWITCHT LFO | Jack_3.5mm_QingPu_WQP-PJ398SM_Vertical_CircularHoles | J8 |
| 1 | AUDIOJACK2_SWITCHT PAN_CV | Jack_3.5mm_QingPu_WQP-PJ398SM_Vertical_CircularHoles | J9 |
| 1 | AUDIOJACK2_SWITCHT PWM CV | Jack_3.5mm_QingPu_WQP-PJ398SM_Vertical_CircularHoles | J10 |
| 1 | AUDIOJACK2_SWITCHT RES CV | Jack_3.5mm_QingPu_WQP-PJ398SM_Vertical_CircularHoles | J11 |
| 1 | AUDIOJACK2_SWITCHT FREQ CV | Jack_3.5mm_QingPu_WQP-PJ398SM_Vertical_CircularHoles | J12 |
Show 59 more
| Qty | Part | Footprint | Refs |
|---|---|---|---|
| 1 | AUDIOJACK2_SWITCHT PITCH CV 1V/OCT | Jack_3.5mm_QingPu_WQP-PJ398SM_Vertical_CircularHoles | J13 |
| 1 | AUDIOJACK2_SWITCHT EXT IN | Jack_3.5mm_QingPu_WQP-PJ398SM_Vertical_CircularHoles | J14 |
| 1 | AUDIOJACK2_SWITCHT VCA CV | Jack_3.5mm_QingPu_WQP-PJ398SM_Vertical_CircularHoles | J15 |
| 1 | AUDIOJACK2_SWITCHT HARD SYNC | Jack_3.5mm_QingPu_WQP-PJ398SM_Vertical_CircularHoles | J16 |
| 1 | AUDIOJACK2_SWITCHT SOFT SYNC | Jack_3.5mm_QingPu_WQP-PJ398SM_Vertical_CircularHoles | J17 |
| 1 | AUDIOJACK2_SWITCHT FM | Jack_3.5mm_QingPu_WQP-PJ398SM_Vertical_CircularHoles | J18 |
| 1 | AUDIOJACK2_SWITCHT MULT | Jack_3.5mm_QingPu_WQP-PJ398SM_Vertical_CircularHoles | J19 |
| 1 | AUDIOJACK2_SWITCHT WAVE IN | Jack_3.5mm_QingPu_WQP-PJ398SM_Vertical_CircularHoles | J20 |
| 1 | AUDIOJACK2_SWITCHT ATT IN (+5V) | Jack_3.5mm_QingPu_WQP-PJ398SM_Vertical_CircularHoles | J21 |
| 1 | AUDIOJACK2_SWITCHT MULT1 | Jack_3.5mm_QingPu_WQP-PJ398SM_Vertical_CircularHoles | J22 |
| 1 | AUDIOJACK2_SWITCHT MULT2 | Jack_3.5mm_QingPu_WQP-PJ398SM_Vertical_CircularHoles | J23 |
| 1 | AUDIOJACK2_SWITCHT ATT OUT | Jack_3.5mm_QingPu_WQP-PJ398SM_Vertical_CircularHoles | J24 |
| 1 | MIX IN2 | Pin_D1.0mm_L10.0mm | J25 |
| 1 | AUDIOJACK2_SWITCHT MIX IN1 (-5V) | Jack_3.5mm_QingPu_WQP-PJ398SM_Vertical_CircularHoles | J26 |
| 1 | AUDIOJACK2_SWITCHT MIX IN2 | Jack_3.5mm_QingPu_WQP-PJ398SM_Vertical_CircularHoles | J27 |
| 1 | AUDIOJACK2_SWITCHT WAVE OUT | Jack_3.5mm_QingPu_WQP-PJ398SM_Vertical_CircularHoles | J28 |
| 1 | AUDIOJACK2_SWITCHT MIX OUT | Jack_3.5mm_QingPu_WQP-PJ398SM_Vertical_CircularHoles | J29 |
| 1 | B100k LEVEL1 | Potentiometer_Alpha_RD901F-40-00D_Single_Vertical_CircularHoles | RV1 |
| 1 | B100k LEVEL2 | Potentiometer_Alpha_RD901F-40-00D_Single_Vertical_CircularHoles | RV2 |
| 1 | 10k LFO TRIM | Potentiometer_Bourns_3314J_Vertical | RV3 |
| 1 | B1M LFO RATE | Potentiometer_Alpha_RD901F-40-00D_Single_Vertical_CircularHoles | RV4 |
| 1 | B100k LFO WAVE | Potentiometer_Alpha_RD901F-40-00D_Single_Vertical_CircularHoles | RV5 |
| 1 | B100k PANNING | Potentiometer_Alpha_RD901F-40-00D_Single_Vertical_CircularHoles | RV6 |
| 1 | B100k A | Potentiometer_Alpha_RD901F-40-00D_Single_Vertical_CircularHoles | RV7 |
| 1 | B100k D | Potentiometer_Alpha_RD901F-40-00D_Single_Vertical_CircularHoles | RV8 |
| 1 | B100k S | Potentiometer_Alpha_RD901F-40-00D_Single_Vertical_CircularHoles | RV9 |
| 1 | B100k R | Potentiometer_Alpha_RD901F-40-00D_Single_Vertical_CircularHoles | RV10 |
| 1 | B100k RES | Potentiometer_Alpha_RD901F-40-00D_Single_Vertical_CircularHoles | RV11 |
| 1 | B100k FREQ | Potentiometer_Alpha_RD901F-40-00D_Single_Vertical_CircularHoles | RV12 |
| 1 | B100k PWM | Potentiometer_Alpha_RD901F-40-00D_Single_Vertical_CircularHoles | RV13 |
| 1 | B100k TUNE | Potentiometer_Alpha_RD901F-40-00D_Single_Vertical_CircularHoles | RV14 |
| 1 | B100k ATT | Potentiometer_Alpha_RD901F-40-00D_Single_Vertical_CircularHoles | RV15 |
| 1 | B100k MIX IN1 LEVEL | Potentiometer_Alpha_RD901F-40-00D_Single_Vertical_CircularHoles | RV16 |
| 1 | EXT_ON | switch-spdt | SW1 |
| 1 | FILTER_A | switch-spdt | SW2 |
| 1 | FILTER_B | switch-spdt | SW3 |
| 1 | FILTER_C | switch-spdt | SW4 |
| 1 | RES_MODE | switch-spdt | SW5 |
| 1 | FREQ_MODE | switch-spdt | SW6 |
| 1 | SAW_TRIANGLE | switch-spdt | SW7 |
| 1 | LED | LED_D5.0mm | D1 |
| 2 | US1G | D_SMA | D2, D3 |
| 11 | BAS85 | D_MiniMELF | D4, D6, D7, D8, D9, D10, D11, D12 +3 |
| 1 | Dual LED | LED_D5.0mm | D5 |
| 2 | 1000UF 1000uF | CP_Elec_10x10 | C1, C2 |
| 2 | 100UF 100uF | CP_Elec_6.3x7.7 | C3, C4 |
| 2 | 10UF 10uF | CP_Elec_4x5.8 | C5, C6 |
| 2 | 1UF 1uF | CP_Elec_4x5.4 | C7, C8 |
| 1 | 2u2 NP | C_1206_3216Metric_Pad1.33x1.80mm_HandSolder | C9 |
| 5 | 100N 100n | C_1206_3216Metric_Pad1.33x1.80mm_HandSolder | C10, C11, C12, C13, C14 |
| 5 | 10K 10k | R_1206_3216Metric_Pad1.30x1.75mm_HandSolder | R1, R18, R19, R47, R50 |
| 10 | 1k | R_1206_3216Metric_Pad1.30x1.75mm_HandSolder | R2, R3, R4, R5, R20, R21, R45, R46 +2 |
| 1 | 100 | R_1206_3216Metric_Pad1.30x1.75mm_HandSolder | R10 |
| 31 | 100K 100k | R_1206_3216Metric_Pad1.30x1.75mm_HandSolder | R11, R12, R13, R15, R22, R23, R24, R25 +23 |
| 1 | 220K 220k | R_1206_3216Metric_Pad1.30x1.75mm_HandSolder | R14 |
| 1 | 15K 15k | R_1206_3216Metric_Pad1.30x1.75mm_HandSolder | R16 |
| 3 | 12K 12k | R_1206_3216Metric_Pad1.30x1.75mm_HandSolder | R17, R48, R49 |
| 1 | 47K 47k | R_1206_3216Metric_Pad1.30x1.75mm_HandSolder | R26 |
| 1 | 470K 470k | R_1206_3216Metric_Pad1.30x1.75mm_HandSolder | R42 |
Polykit X1 Monosynth design files
The KiCad project lives in the polykit/polykit-x-monosynth repository on GitHub; these links point at the commit this page was built from.
- Layoutpolykit-x-monosynth.kicad_pcb
- Schematicpolykit-x-monosynth.kicad_sch
- BOMREADME.md
Polykit X1 Monosynth: common questions
How big is the Polykit X1 Monosynth PCB?
The Polykit X1 Monosynth measures 200 × 100 mm, has 2 copper layers and is 1.6 mm thick.
How many components are on the Polykit X1 Monosynth?
147 components, from 79 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 Polykit X1 Monosynth design files?
From the polykit/polykit-x-monosynth 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 Polykit X1 Monosynth design in my own project?
The repository has no license, so all rights stay with polykit. Use it as a reference, and ask the author before reusing the design.
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