2 layers215 × 100 mm
2 layers215 × 100 mm
Core
shmoergh/hog124Fully analog two-voice monophonic synth for live performances
- Size
- 215 × 100 mm
- Copper layers
- 2
- Thickness
- 1.6 mm
- Parts
- 370
- Nets
- 217
- Pads
- 995
- Tracks, vias
- 2,839, 677
- Pours
- 2
- Routed
- Yes
- KiCad
- KiCad 8.0 (file 20240108)
- Created
- 27 Oct 2024
- Updated
- 13 Jul 2025
Overview
Core is an open-source printed circuit board by shmoergh, from the shmoergh/hog repository on GitHub. It is a 2-layer board of 215 × 100 mm with 370 parts on 217 nets, routed with 2,839 tracks and 677 vias.
It is built around the TL072, LM311 and BC548C, with the BC847BS, MMBT5551 and J111 among its other parts. Its parts include 138 resistors, 85 capacitors, 23 ICs, 15 diodes and 15 transistors. It belongs with the audio and music boards of this library.
Main components
7
TL072
SOP-8-18V~18V 0℃~+70℃ 1.4mA 1.5nA 10V/us 10mV 2 2.5nA 3MHz 85dB SOP-8 Operational Amplifier ROHSGcoreOperational AmplifierLM311
SOP-80℃~+70℃ 1 1.7nA 2.4mA 200ns 2mV 36V 45nA 5V~30V TTL、CMOS ±15V SOP-8 Comparators ROHSGcoreComparators
BC548C
TO-92-55℃~+150℃ 100mA 15nA 300MHz 30V 420 600mV NPN TO-92 Bipolar (BJT) ROHSDIOTECBipolar (BJT)
BC847BS
SOT-363Bipolar (BJT)hongjiacheng
MMBT5551
SOT-23-55℃~+150℃ 1 NPN 160V 200 200mV 300MHz 300mW 50nA 600mA 6V NPN SOT-23 Bipolar (BJT) ROHSJiangsu Changjing Electronics Technology (CJ)Bipolar (BJT)
J111
TO-92-3LTO-92-3L JFETs ROHSonsemiJFETsMMBFJ111
SOT-23-55℃~+150℃ 1 N-channel 20mA 30Ω 350mW 35V 3V N-Channel SOT-23 JFETs ROHSonsemiJFETs
README
README.mdHog
Fully analog two-voice monophonic synth for live performances.
Details and user guide: shmoergh.com
Latest revision: rev #3.
Build
The HOG is a very fun but equally advanced electronics project. It's fully open source and we've put together a build guide for the brave ones who decide to build one. Let us know if you have questions and definitely share some pics of your builds (follow Shmøergh on Instagram).
BOMs
The HOG consists of 5 separate boards which you can find in the boards folder. Each board has it's own gerber files for JLCPCB PCB and Mouser BOMs in the board's production folders. The Core and Filter boards have SMD components too for which you can find JLCPCB assembly files (BOM and position) in the production/jlcpcb folder.
Cloning
The MIDI2CV module uses pico-lib submodule. Make sure you clone
the repo like with its submodules:
git clone --recurse-submodules git@github.com:shmoergh/hog.gitLicense
Shmoergh Hog © 2024
Hardware is licensed under CC BY-NC 4.0
Software is licensed under MIT.
Font used on PCBs: https://departuremono.com
Simulations made in CircuitJS
Disclaimer
All electronic projects and designs presented on this web site, or associated web sites should be considered dangerous if not lethal if not used safely. When working on projects based on the designs on this site, use extreme care to ensure that you do not come into contact with mains AC voltages or high voltage DC. If you are not confident about working with mains voltages, or high voltages, or you are not legally allowed to work with mains voltages, or high voltages, you are advised not to attempt work on them. The author, host, and all people associated with these web pages disclaim any liability for damages should anyone be killed or injured while working on these projects, or projects based on these designs, or any other project or design presented on these web pages and any associated web pages. The author, host, and all people associated with these web pages also disclaim any liability for projects, or projects based on these designs, or any other project or design presented on these web pages and any associated web pages when used in such a way as to infringe relevant government regulations and by-laws.
All circuits, schematics, printed circuit board, panel design and associated data published on this site can be used for private use only.
We are not responsible for any errors in the PCB design or the parts list. All responsibility for ordering PCBs, components, and assembly services rests solely with you.
Parts
370| Qty | Value | Footprint | References |
|---|---|---|---|
| 51 | 100k | Resistor_SMD:R_0603_1608Metric | R201, R213, R216, R228, R232, R235, R237, R242, R243, R244, R246, R247, R250, R252, R253, R254 +35 |
| 48 | 100n | Capacitor_SMD:C_0603_1608Metric | C201, C202, C203, C204, C205, C206, C211, C212, C213, C214, C215, C216, C221, C222, C223, C224 +32 |
| 20 | TL072 | Package_SO:SOIC-8_3.9x4.9mm_P1.27mm | U201, U202, U204, U205, U207, U208, U209, U210, U211, U214, U217, U218, U219, U220, U221, U222 +4 |
| 13 | 47k | Resistor_SMD:R_0603_1608Metric | R257, R267, R290, R291, R292, R293, R311, R321, R330, R331, R332, R333, R334 |
| 11 | 1N4148 | Diode_SMD:D_SOD-123 | D203, D204, D207, D208, D209, D210, D211, D212, D213, D216, D217 |
| 8 | 10k | Resistor_SMD:R_0603_1608Metric | R236, R238, R239, R266, R288, R289, R324, R325 |
| 8 | See t.comp. table | Shmoergh_Custom_Footprints:R_Axial_DIN0207_L6.3mm_D2.5mm_P7.62mm_Horizontal | R203, R204, R206, R218, R219, R221, R275, R276 |
| 6 | 1M | Resistor_SMD:R_0603_1608Metric | R205, R208, R220, R223, R322, R323 |
| 6 | 47p | Capacitor_SMD:C_0603_1608Metric | C273, C274, C282, C283, C284, C285 |
| 5 | 100k Log | Potentiometer_THT:Potentiometer_ACP_CA6-H2,5_Horizontal | RV201, RV202, RV203, RV204, RV205 |
| 5 | 1k | Resistor_SMD:R_0603_1608Metric | R269, R272, R277, R294, R295 |
| 5 | 2.2k | Resistor_SMD:R_0603_1608Metric | R215, R230, R258, R297, R312 |
| 5 | 220k | Resistor_SMD:R_0603_1608Metric | R256, R259, R310, R313, R320 |
| 4 | 1.5k | Resistor_SMD:R_0603_1608Metric | R207, R209, R222, R224 |
| 4 | 150k | Resistor_SMD:R_0603_1608Metric | R202, R212, R217, R227 |
| 4 | 15k | Resistor_SMD:R_0603_1608Metric | R248, R249, R302, R303 |
| 4 | 22uF | Capacitor_SMD:CP_Elec_6.3x5.4 | C225, C226, C227, C275 |
| 4 | 47u | Capacitor_SMD:CP_Elec_6.3x5.4 | C252, C256, C280, C281 |
| 4 | 5.1V | Diode_THT:D_DO-34_SOD68_P2.54mm_Vertical_AnodeUp | D205, D206, D214, D215 |
| 4 | Conn_02x08_Counter_Clockwise | Connector_PinHeader_2.54mm:PinHeader_2x08_P2.54mm_Vertical | J201, J202, J203, J204 |
| 4 | MountingHole | MountingHole:MountingHole_3mm_Pad | H201, H202, H203, H204 |
| 4 | See t.comp. table | Potentiometer_THT:Potentiometer_Bourns_3006P_Horizontal | R_WIDTH201, R_WIDTH202, R_WIDTH203, R_WIDTH204 |
| 3 | 100k | Potentiometer_THT:Potentiometer_Bourns_3006P_Horizontal | RV_ADSR_MAX_VOLTAGE201, RV_TRI_BIAS201, RV_TRI_BIAS202 |
| 3 | 100p | Capacitor_SMD:C_0603_1608Metric | C208, C218, C276 |
| 3 | 470k | Resistor_SMD:R_0603_1608Metric | R240, R241, R296 |
| 3 | BC548C | Package_TO_SOT_THT:TO-92L_Inline_Wide | Q208, Q209, Q210 |
| 3 | BC847BS | Package_TO_SOT_SMD:SOT-363_SC-70-6 | Q202, Q205, Q207 |
| 3 | LOGO | Shmoergh_Custom_Footprints:Gyeszno | G***, G***, G*** |
| 3 | MMBT5551 | Package_TO_SOT_SMD:SOT-23 | Q212, Q213, Q214 |
| 2 | -18mV/V | TestPoint:TestPoint_THTPad_2.0x2.0mm_Drill1.0mm | TP201, TP205 |
| 2 | 100 | Resistor_SMD:R_0603_1608Metric | R273, R274 |
| 2 | 100k (prec) | Potentiometer_THT:Potentiometer_Bourns_3006P_Horizontal | R_BIAS201, R_BIAS203 |
| 2 | 100p-1n | Capacitor_THT:C_Disc_D3.0mm_W1.6mm_P2.50mm | C207, C217 |
| 2 | 100u | Capacitor_SMD:CP_Elec_6.3x7.7 | C260, C261 |
| 2 | 10k | Potentiometer_THT:Potentiometer_Bourns_3006P_Horizontal | RV_SAW_BIAS201, RV_SAW_BIAS202 |
| 2 | 10p-100p | Capacitor_THT:C_Rect_L7.0mm_W2.5mm_P5.00mm | C228, C264 |
| 2 | 2.2M | Resistor_SMD:R_0603_1608Metric | R260, R314 |
| 2 | 2.2nF (foil) | Capacitor_THT:C_Rect_L7.2mm_W2.5mm_P5.00mm_FKS2_FKP2_MKS2_MKP2 | C209, C219 |
| 2 | 22k | Resistor_SMD:R_0603_1608Metric | R211, R226 |
| 2 | 22n-47n (foil) | Capacitor_THT:C_Rect_L7.0mm_W2.5mm_P5.00mm | C251, C255 |
| 2 | 22p | Capacitor_SMD:C_0603_1608Metric | C210, C220 |
| 2 | 22p | Capacitor_THT:C_Disc_D3.0mm_W2.0mm_P2.50mm | C235, C271 |
| 2 | 240k | Resistor_SMD:R_0603_1608Metric | R261, R315 |
| 2 | 27k | Resistor_SMD:R_0603_1608Metric | R251, R305 |
| 2 | 2N3906 | Package_TO_SOT_THT:TO-92L_Inline_Wide | Q201, Q204 |
| 2 | 2k (prec) | Potentiometer_THT:Potentiometer_Bourns_3006P_Horizontal | R_HIFREQ201, R_HIFREQ202 |
| 2 | 330k | Resistor_SMD:R_0603_1608Metric | R214, R229 |
| 2 | 33k | Resistor_SMD:R_0603_1608Metric | R234, R245 |
| 2 | 33p | Capacitor_SMD:C_0603_1608Metric | C236, C272 |
| 2 | 510 | Resistor_SMD:R_0603_1608Metric | R210, R225 |
| 2 | Conn_01x03 | Connector_PinHeader_2.54mm:PinHeader_1x03_P2.54mm_Vertical | J205, J206 |
| 2 | HiFreq | TestPoint:TestPoint_THTPad_2.0x2.0mm_Drill1.0mm | TP202, TP206 |
| 2 | J111 | Package_TO_SOT_THT:TO-92_Inline_Wide | Q211, Q215 |
| 2 | LM311 | Package_SO:SOIC-8_3.9x4.9mm_P1.27mm | U203, U206 |
| 2 | MMBFJ111 | Package_TO_SOT_SMD:SOT-23_Handsoldering | Q203, Q206 |
| 2 | PTS120602B100RP100 | Resistor_SMD:R_1206_3216Metric_Pad1.30x1.75mm_HandSolder | TH201, TH202 |
| 2 | PW | TestPoint:TestPoint_THTPad_2.0x2.0mm_Drill1.0mm | TP215, TP216 |
| 2 | RAW_SAW | TestPoint:TestPoint_THTPad_2.0x2.0mm_Drill1.0mm | TP233, TP234 |
| 2 | Red LED | LED_THT:LED_D5.0mm | D_NEGATIVE_LIMITER201, D_POSITIVE_LIMITER201 |
| 2 | Reset OUT | TestPoint:TestPoint_THTPad_2.0x2.0mm_Drill1.0mm | TP204, TP208 |
| 2 | SAW | TestPoint:TestPoint_THTPad_2.0x2.0mm_Drill1.0mm | TP211, TP212 |
| 2 | SAWInv | TestPoint:TestPoint_THTPad_2.0x2.0mm_Drill1.0mm | TP209, TP210 |
| 2 | SQR | TestPoint:TestPoint_THTPad_2.0x2.0mm_Drill1.0mm | TP217, TP218 |
| 2 | See t.comp. table | Package_TO_SOT_THT:TO-92-2 | TH203, TH204 |
| 2 | TRI | TestPoint:TestPoint_THTPad_2.0x2.0mm_Drill1.0mm | TP213, TP214 |
| 2 | VCOVREF | TestPoint:TestPoint_THTPad_2.0x2.0mm_Drill1.0mm | TP203, TP207 |
| 1 | 100k | Potentiometer_THT:Potentiometer_ACP_CA6-H2,5_Horizontal | RV_HEADPHONE_LIM201 |
| 1 | 100k | Resistor_SMD:R_0603_1608Metric_Pad0.98x0.95mm_HandSolder | R270 |
| 1 | 10k | Potentiometer_THT:Potentiometer_ACP_CA6-H2,5_Horizontal | RV_LINE_OUT_LVL201 |
| 1 | 10k (prec) | Potentiometer_THT:Potentiometer_Bourns_3006P_Horizontal | R_5V201 |
| 1 | 10n | Capacitor_SMD:C_0603_1608Metric | C240 |
| 1 | 10u | Capacitor_THT:CP_Radial_D6.3mm_P2.50mm | C241 |
| 1 | 150 | Resistor_SMD:R_0603_1608Metric | R271 |
| 1 | 1u | Capacitor_SMD:C_0603_1608Metric_Pad1.08x0.95mm_HandSolder | C277 |
| 1 | 1u (foil or electrolite) | Capacitor_THT:C_Rect_L7.2mm_W5.5mm_P5.00mm_FKS2_FKP2_MKS2_MKP2 | C248 |
| 1 | 2.2k | Resistor_SMD:R_0603_1608Metric_Pad0.98x0.95mm_HandSolder | R299 |
| 1 | 220 | Resistor_SMD:R_0603_1608Metric | R233 |
| 1 | 3.3M | Resistor_SMD:R_0603_1608Metric | R298 |
| 1 | 4.7k | Resistor_SMD:R_0603_1608Metric | R231 |
| 1 | 4002 | Package_DIP:DIP-14_W7.62mm | U212 |
The 336 most common of 370 parts.
Questions
How big is the Core PCB?
It measures 215 × 100 mm and has 2 copper layers, 1.6 mm thick.
What parts does the Core use?
370 parts, built around the TL072, LM311, BC548C and BC847BS. The full list of its parts is on this page, with links to each part's symbol and footprint where PCBKit's library has them.
Where can I download the Core KiCad files?
From the shmoergh/hog repository on GitHub, at the commit this page was made from: the board is boards/core/experimental/core.kicad_pcb and its schematic boards/core/experimental/core.kicad_sch. PCBKit opens the board in the browser, with nothing to install.
Can I use the Core design in my own project?
Its repository states no licence, so its author keeps all rights: ask shmoergh before reusing the design.
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