4 layers133.9 × 165.1 mm
Main VCO board
JordanAceto/micro_ox
Monosynth with analog signal path and digital controls. SSI2130 VCOs and SSI2140 VCF.
295 parts8CC-BY-4.0
2 layers84.5 × 108.3 mm
Phasor II
JordanAceto/Phasor_II66-stage optical phase shifter pedal ala the Mu-tron II with extra features
- Size
- 84.5 × 108.3 mm
- Copper layers
- 2
- Thickness
- 1.6 mm
- Parts
- 196
- Nets
- 105
- Pads
- 472
- Tracks, vias
- 1,230, 151
- Pours
- 2
- Routed
- Yes
- KiCad
- KiCad 6 (file 20211014)
- Created
- 30 Jan 2023
- Updated
- 1 Feb 2023
Overview
Phasor II is an open-source printed circuit board by JordanAceto, from the JordanAceto/Phasor_II repository on GitHub, published under the CC-BY-4.0 licence. It is a 2-layer board of 84.5 × 108.3 mm with 196 parts on 105 nets, routed with 1,230 tracks and 151 vias.
It is built around the RC4558D, TL072 and B5819W, with the 1N4148W, BAT48ZFILM and MMBT3906 among its other parts. Its parts include 77 resistors, 55 capacitors, 10 ICs, 9 diodes and 4 connectors. It belongs with the audio and music boards of this library.
Main components
6
RC4558D
SOIC-8-15V~-5V、5V~15V 0℃~+70℃ 1.7V/us 2 2.5mA 200nA 3MHz 500nA 6mV 8nV/√Hz@1kHz 90dB Built-in compensation SOIC-8 Operational Amplifier ROHSTexas InstrumentsOperational Amplifier
TL072
SOP-8-18V~18V 0℃~+70℃ 1.4mA 1.5nA 10V/us 10mV 2 2.5nA 3MHz 85dB SOP-8 Operational Amplifier ROHSGcoreOperational Amplifier
B5819W
SOD-123-55℃~+125℃ 1.5A 1mA@40V 25A 40V 600mV@1A Standalone SOD-123 Schottky Diodes ROHSMDDSchottky Diodes1N4148W
SOD-123150mA 1A 1V@50mA 1uA@75V 400mW 4ns 75V Independent SOD-123 Switching Diodes ROHSSTMicroelectronicsSwitching DiodesBAT48ZFILM
SOD-123-40℃~+150℃ 25uA@40V 350mA 40V 900mV@500mA Independent SOD-123 Schottky Diodes ROHSSTMicroelectronicsSchottky Diodes
MMBT3906
SOT-23-55℃~+150℃ 1 PNP 100 100nA 200mA 200mW 300MHz 300mV 40V 5V PNP SOT-23 Bipolar (BJT) ROHSTWGMCBipolar (BJT)
README
README.mdPhasor II Guitar Pedal
6-stage optical phase shifter pedal ala the Mu-tron II with extra features
- Fits in a Hammond BB style box
- Classic
RATE,DEPTH, andFEEDBACKcontrols - Powered by a standard guitar pedal style center-negative 9VDC power supply
- Expression pedal/CV input jack
- Connect a Moog EP-3 or similar expression pedal with a TRS cable
- Or inject a Control Voltage in the range [0v, +5v] with a TS cable
- An internal jumper selects the destination for the modulation
LFO DEPTHLFO RATEMANUAL SWEEP
SCHEMATIC
Calibration
There are three points of calibration via internal trimpots
-
EXP PEDAL TRIM- Connect a Moog EP-3 or similar expression pedal to the
CV-PEDjack and power the pedal ON - Make sure that any built in attenuators on the expression pedal are turned all the way up
- With a multimeter set to DC volts measure the TIP of the
CV-PEDjack relative to ground (there is a convenient place to clip the black lead of the multimeter on the pcb) - Sweep the expression pedal all the way forwards, and adjust the
EXP PEDAL TRIMtrimpot until you measure +5VDC - Sweep the expression pedal back and forth and observe that the tip of the
CV-PEDjack sweeps from 0v to +5v
- Connect a Moog EP-3 or similar expression pedal to the
-
DEPTH TRIM- This sets the width of the phasor sweep
- Adjust by ear so that the sweep width is pleasant
-
CENTER TRIM- This sets the center of the phasor sweep
- Adjust by ear so that the bottom "turn around" feels good
-
The depth and center trims are somewhat interactive, and should be trimmed together iteratively. Try a variety of rate and depth settings while calibrating.
-
Note that while there is a light shield covering the photocells, ambient light will slightly change the sweep when the back panel is off
- Perform calibration in a dim room. It doesn't need to be pitch black, just avoid shining bright lights right onto the guts
There are no wrong or harmful settings, adjust these to taste. If the expression pedal feels better to you with a different voltage across it, go nuts.
Current consumed from the 9VDC power input
9VDC : 200mA
Status of the project:
| Task | Status |
|---|---|
| Schematic capture | ☑ |
| PCB layout | ☑ |
| Test build | ☑ |
| Safe to order boards | ☑ |
Parts
196| Qty | Value | Footprint | References |
|---|---|---|---|
| 26 | 100n | Capacitor_SMD:C_0603_1608Metric | C2, C203, C701, C702, C811, C812, C813, C814, C815, C816, C817, C818, C819, C820, C821, C822 +10 |
| 20 | 4k7 | Resistor_SMD:R_0603_1608Metric | R201, R205, R207, R208, R209, R301, R303, R304, R306, R307, R309, R310, R312, R313, R315, R316 +4 |
| 11 | 100k | Resistor_SMD:R_0603_1608Metric | R501, R507, R510, R515, R518, R520, R602, R604, R705, R806, R807 |
| 8 | 220k | Resistor_SMD:R_0603_1608Metric | R302, R305, R308, R311, R314, R317, R324, R502 |
| 6 | 1n | Capacitor_SMD:C_0603_1608Metric | C205, C401, C501, C502, C504, C505 |
| 6 | 6n8 | Capacitor_SMD:C_0805_2012Metric | C301, C302, C303, C304, C305, C306 |
| 5 | 10k | Resistor_SMD:R_0603_1608Metric | R102, R323, R513, R701, R702 |
| 5 | B5819W | Diode_SMD:D_SOD-123 | D1, D2, D3, D4, D101 |
| 5 | RC4558 | Package_SO:SOIC-8_3.9x4.9mm_P1.27mm | U1, U2, U3, U4, U5 |
| 4 | 10u | Capacitor_THT:CP_Radial_D6.3mm_P2.50mm | C7, C8, C9, C10 |
| 4 | TL072 | Package_SO:SOIC-8_3.9x4.9mm_P1.27mm | U6, U7, U8, U9 |
| 3 | 100R @ 100MHz | Inductor_SMD:L_0805_2012Metric | FB1, FB2, FB3 |
| 3 | 270 | Resistor_SMD:R_0603_1608Metric | R504, R511, R605 |
| 3 | 4u7 | Capacitor_SMD:C_0805_2012Metric | C1, C5, C6 |
| 2 | 1 | Resistor_SMD:R_0603_1608Metric | R1, R2 |
| 2 | 100k | Potentiometer_THT:Potentiometer_Bourns_3296W_Vertical | RV503, RV701 |
| 2 | 100k | custom_footprints:Potentiometer_Alpha_RD901F-40-00D_Single_Vertical | RV501, RV502 |
| 2 | 120k | Resistor_SMD:R_0603_1608Metric | R512, R514 |
| 2 | 12k | Resistor_SMD:R_0603_1608Metric | R403, R508 |
| 2 | 1N4148W | Diode_SMD:D_SOD-123 | D301, D302 |
| 2 | 1u | Capacitor_SMD:C_0805_2012Metric | C3, C4 |
| 2 | 200k | Resistor_SMD:R_0603_1608Metric | R704, R706 |
| 2 | 22k | Resistor_SMD:R_0603_1608Metric | R503, R603 |
| 2 | 390k | Resistor_SMD:R_0603_1608Metric | R202, R204 |
| 2 | 3k9 | Resistor_SMD:R_0603_1608Metric | R203, R321 |
| 2 | 56k | Resistor_SMD:R_0603_1608Metric | R505, R517 |
| 2 | 68k | Resistor_SMD:R_0603_1608Metric | R319, R322 |
| 2 | BAT48ZFILM | Diode_SMD:D_SOD-123 | D501, D502 |
| 2 | MMBT3906 | Package_TO_SOT_SMD:SOT-23 | Q601, Q602 |
| 1 | +12 | TestPoint:TestPoint_Keystone_5000-5004_Miniature | TP804 |
| 1 | +9 | TestPoint:TestPoint_Keystone_5000-5004_Miniature | TP802 |
| 1 | -12 | TestPoint:TestPoint_Keystone_5000-5004_Miniature | TP803 |
| 1 | 100p | Capacitor_SMD:C_0603_1608Metric | C506 |
| 1 | 10k | custom_footprints:Potentiometer_Alpha_RD901F-40-00D_Single_Vertical | RV201 |
| 1 | 10uH, 1.2A | Inductor_SMD:L_Taiyo-Yuden_NR-50xx | L1 |
| 1 | 110k | Resistor_SMD:R_0603_1608Metric | R506 |
| 1 | 114k | Resistor_SMD:R_0603_1608Metric | R3 |
| 1 | 13k3 | Resistor_SMD:R_0603_1608Metric | R4 |
| 1 | 18k | Resistor_SMD:R_0603_1608Metric | R516 |
| 1 | 1k | Potentiometer_THT:Potentiometer_Bourns_3296W_Vertical | RV302 |
| 1 | 1k | Resistor_SMD:R_0603_1608Metric | R103 |
| 1 | 1k5 | Resistor_SMD:R_0603_1608Metric | R206 |
| 1 | 1k8 | Resistor_SMD:R_0603_1608Metric | R805 |
| 1 | 20k | Resistor_SMD:R_0603_1608Metric | R703 |
| 1 | 220 | Resistor_SMD:R_0603_1608Metric | R325 |
| 1 | 220n | Capacitor_THT:C_Rect_L7.0mm_W2.5mm_P5.00mm | C402 |
| 1 | 22p | Capacitor_SMD:C_0603_1608Metric | C202 |
| 1 | 30k | Resistor_SMD:R_0603_1608Metric | R509 |
| 1 | 33k | Resistor_SMD:R_0603_1608Metric | R601 |
| 1 | 39k | Resistor_SMD:R_0603_1608Metric | R519 |
| 1 | 3n3 | Capacitor_SMD:C_0603_1608Metric | C204 |
| 1 | 470n | Capacitor_THT:C_Rect_L7.0mm_W3.5mm_P5.00mm | C307 |
| 1 | 470p | Capacitor_SMD:C_0603_1608Metric | C403 |
| 1 | 47n | Capacitor_SMD:C_0805_2012Metric | C503 |
| 1 | 47n | Capacitor_THT:C_Rect_L7.0mm_W2.5mm_P5.00mm | C201 |
| 1 | 9VDC_IN | Connector_BarrelJack:BarrelJack_CUI_PJ-063AH_Horizontal | J4 |
| 1 | AUDIO_IN | custom_footprints:Jack_6.35mm_Neutrik_NMJ6HCD2_Horizontal | J1 |
| 1 | AUDIO_OUT | custom_footprints:Jack_6.35mm_Neutrik_NMJ6HCD2_Horizontal | J2 |
| 1 | EXP_PEDAL_CV_IN | custom_footprints:Jack_6.35mm_Neutrik_NMJ6HCD2_Horizontal | J3 |
| 1 | FOOTSWITCH | Connector_PinHeader_2.54mm:PinHeader_1x06_P2.54mm_Vertical | SW101 |
| 1 | G*** | kibuzzard-634AF413 | kibuzzard-634AF413 |
| 1 | G*** | kibuzzard-634AF403 | kibuzzard-634AF403 |
| 1 | G*** | kibuzzard-634AF397 | kibuzzard-634AF397 |
| 1 | G*** | kibuzzard-634B0BDD | kibuzzard-634B0BDD |
| 1 | G*** | kibuzzard-634B0C2B | kibuzzard-634B0C2B |
| 1 | G*** | kibuzzard-634B411E | kibuzzard-634B411E |
| 1 | G*** | kibuzzard-634AF3EB | kibuzzard-634AF3EB |
| 1 | G*** | kibuzzard-634AF4C9 | kibuzzard-634AF4C9 |
| 1 | G*** | kibuzzard-634B3AE3 | kibuzzard-634B3AE3 |
| 1 | G*** | kibuzzard-634AF4C0 | kibuzzard-634AF4C0 |
| 1 | G*** | kibuzzard-634AF45B | kibuzzard-634AF45B |
| 1 | G*** | kibuzzard-634AF436 | kibuzzard-634AF436 |
| 1 | G*** | kibuzzard-634AF49E | kibuzzard-634AF49E |
| 1 | G*** | kibuzzard-634B0B87 | kibuzzard-634B0B87 |
| 1 | G*** | kibuzzard-634AF448 | kibuzzard-634AF448 |
| 1 | G*** | kibuzzard-634AF4D7 | kibuzzard-634AF4D7 |
| 1 | G*** | kibuzzard-634B0BBC | kibuzzard-634B0BBC |
| 1 | G*** | kibuzzard-634AF3B0 | kibuzzard-634AF3B0 |
| 1 | GND | TestPoint:TestPoint_Bridge_Pitch7.62mm_Drill1.3mm | TP801 |
| 1 | LDR_ring | custom_footprints:LDR_ring | U301 |
The 190 most common of 196 parts.
Questions
How big is the Phasor II PCB?
It measures 84.5 × 108.3 mm and has 2 copper layers, 1.6 mm thick.
What parts does the Phasor II use?
196 parts, built around the RC4558D, TL072, B5819W and 1N4148W. 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 Phasor II KiCad files?
From the JordanAceto/Phasor_II repository on GitHub, at the commit this page was made from: the board is main_pcb/kicad_6/phasor_II.kicad_pcb and its schematic jack_panel/kicad_6/phasor_II_jack_panel.kicad_sch. PCBKit opens the board in the browser, with nothing to install.
Can I use the Phasor II design in my own project?
Its repository publishes it under the CC-BY-4.0 licence: you may reuse it on that licence's terms (keep the author's notice, and for a copyleft licence share your changes alike).
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