2 layers70 × 70 mm
4 layers36.2 × 104.6 mm
Chor cho
myaipen24/PACHO_ChorusA bit of a rip off of the "Little Angel" Chorus Pedal by Rick Holt but designed as an PCB using mostly SMD components.
- Size
- 36.2 × 104.6 mm
- Copper layers
- 4
- Thickness
- 1.6 mm
- Parts
- 70
- Nets
- 52
- Pads
- 180
- Tracks, vias
- 212, 75
- Pours
- 11
- Routed
- Yes
- KiCad
- KiCad 9.0 (file 20241229)
- Created
- 23 Sep 2026
- Updated
- 3 Oct 2026
Overview
Chor cho is an open-source printed circuit board by myaipen24, from the myaipen24/PACHO_Chorus repository on GitHub. It is a 4-layer board of 36.2 × 104.6 mm with 70 parts on 52 nets, routed with 212 tracks and 75 vias.
It is built around the TL072CDR-CN, 78L05 and BD90C0AFP-CE2, with the NMJ6HCD2, 1N4148WT and PJ-202BH among its other parts. Its parts include 25 resistors, 22 capacitors, 5 ICs, 3 diodes and 3 connectors.
Main components
6
TL072CDR-CN
SOP-8SOP-8 FET Input Amplifiers ROHSChipNoboFET Input Amplifiers
78L05
SOT-89-3-20℃~+120℃@(Tj) 1 1.7V 100mA 2mA 30V 40uV 49dB@(120Hz) 5V Fixed Over Temperature Protection、Short Circuit Protection Positive SOT-89-3 Voltage Regulators - Linear, Low Drop Out (LDO) Regulators ROHSUMWVoltage Regulators - Linear, Low Drop Out (LDO) Regulators
BD90C0AFP-CE2
TO-252TO-252 Voltage Regulators - Linear, Low Drop Out (LDO) Regulators ROHSROHM SemiconductorVoltage Regulators - Linear, Low Drop Out (LDO) Regulators
NMJ6HCD2
插件插件 Audio Connectors ROHSNeutrikAudio Connectors (Headphones)
1N4148WT
SOD-523-55℃~+150℃ 1.25V@150mA 100V 150mA 150mW 1uA@75V 2A 4ns Independent SOD-523 Switching Diodes ROHShongjiachengSwitching Diodes
PJ-202BH
插件-25℃~+85℃ 2.5mm 24V 5A 6.5mm 插件 DC Power Connectors ROHSCUIDC Power Connectors
README
README.mdPACHO_Chorus
A bit of a rip off of the "Little Angel" Chorus Pedal by Rick Holt but designed as an PCB using mostly SMD components.
Parts
70| Qty | Value | Footprint | References |
|---|---|---|---|
| 9 | 0.1u | Capacitor_SMD:C_0603_1608Metric | C5, C6, C10, C11, C12, C13, C14, C15, C22 |
| 8 | 10k | Resistor_SMD:R_0603_1608Metric | R1, R2, R3, R10, R11, R15, R16, R17 |
| 6 | 10u | Capacitor_SMD:C_0805_2012Metric | C8, C9, C17, C18, C19, C20 |
| 4 | 501k | Resistor_SMD:R_0603_1608Metric | R18, R19, R20, R21 |
| 4 | MountingHole | MountingHole:MountingHole_3.2mm_M3 | H1, H2, H3, H4 |
| 3 | 0.01u | Capacitor_SMD:C_0603_1608Metric | C1, C2, C7 |
| 3 | LOGO | LOGO | G***, G***, G*** |
| 2 | 0.001u | Capacitor_SMD:C_0603_1608Metric | C3, C4 |
| 2 | 100k | Resistor_SMD:R_0603_1608Metric | R5, R23 |
| 2 | 220k | Resistor_SMD:R_0603_1608Metric | R7, R8 |
| 2 | NMJ6HCD2 | Connector_Audio:Jack_6.35mm_Neutrik_NMJ6HCD2_Horizontal | J1, J2 |
| 2 | TL072CDR | Chor_Cho_Footprints:TL072 | U4, U5 |
| 1 | 0 | Resistor_SMD:R_0603_1608Metric | R25 |
| 1 | 0.1u | Capacitor_SMD:C_0805_2012Metric | C21 |
| 1 | 100 | Resistor_SMD:R_0603_1608Metric | R22 |
| 1 | 100k | Connector_PinHeader_2.54mm:PinHeader_1x03_P2.54mm_Vertical | Speed |
| 1 | 120 | Resistor_SMD:R_0603_1608Metric | R24 |
| 1 | 1M | Resistor_SMD:R_0603_1608Metric | R13 |
| 1 | 1M | Connector_PinHeader_2.54mm:PinHeader_1x03_P2.54mm_Vertical | Vol. |
| 1 | 1N4148WT | Diode_SMD:D_SOD-523 | D1 |
| 1 | 1u | Capacitor_SMD:C_0603_1608Metric | C16 |
| 1 | 2N3904 | Package_TO_SOT_THT:TO-92_Inline | Q1 |
| 1 | 330k | Resistor_SMD:R_0603_1608Metric | R14 |
| 1 | 33k | Resistor_SMD:R_0603_1608Metric | R4 |
| 1 | 4.7k | Resistor_SMD:R_0603_1608Metric | R9 |
| 1 | 470k | Connector_PinHeader_2.54mm:PinHeader_1x03_P2.54mm_Vertical | Depth |
| 1 | 470k | Resistor_SMD:R_0603_1608Metric | R12 |
| 1 | 47k | Resistor_SMD:R_0603_1608Metric | R6 |
| 1 | 78L05 | Chor_Cho_Footprints:78L05 | U2 |
| 1 | BD90C0AFP-CE2 | Chor_Cho_Footprints:BD90C0AFP-CE2 | U3 |
| 1 | D_Schottky | Diode_SMD:D_SOD-323 | D2 |
| 1 | LED_BGKR | LED_SMD:LED_Cree-PLCC4_3.2x2.8mm_CCW | D3 |
| 1 | PJ-202BH | Chor_Cho_Footprints:PJ-202BH | J3 |
| 1 | PT2399-Detailed | Package_DIP:DIP-16_W7.62mm | U1 |
| 1 | ~ | Connector_PinHeader_2.54mm:PinHeader_1x09_P2.54mm_Vertical | SW2 |
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Questions
How big is the Chor cho PCB?
It measures 36.2 × 104.6 mm and has 4 copper layers, 1.6 mm thick.
What parts does the Chor cho use?
70 parts, built around the TL072CDR-CN, 78L05, BD90C0AFP-CE2 and NMJ6HCD2. 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 Chor cho KiCad files?
From the myaipen24/PACHO_Chorus repository on GitHub, at the commit this page was made from: the board is Board Design/Chor-cho.kicad_pcb and its schematic Board Design/Chor-cho.kicad_sch. PCBKit opens the board in the browser, with nothing to install.
Can I use the Chor cho design in my own project?
Its repository states no licence, so its author keeps all rights: ask myaipen24 before reusing the design.