2 layers162.6 × 100.3 mm
2 layers90 × 100 mm
Poly envelope
EchelonForce/poly_envelope_pcb5A polyphonic envelope eurorack module design, in KiCAD.
- Size
- 90 × 100 mm
- Copper layers
- 2
- Thickness
- 1.6 mm
- Parts
- 207
- Nets
- 143
- Pads
- 552
- Tracks, vias
- 913, 71
- Pours
- 2
- Routed
- Yes
- KiCad
- KiCad 6 (file 20211014)
- Created
- 10 Jul 2022
- Updated
- 10 Jul 2022
Overview
Poly envelope is an open-source printed circuit board by EchelonForce, from the EchelonForce/poly_envelope_pcb repository on GitHub. It is a 2-layer board of 90 × 100 mm with 207 parts on 143 nets, routed with 913 tracks and 71 vias.
It is built around the LM358 and TL072. Its parts include 100 resistors, 38 capacitors, 19 diodes, 13 connectors and 11 ICs. It belongs with the audio and music boards of this library.
Main components
2README
README.mdpoly_envelope_pcb
This is a PCB design of a Polyphonic Envelope for Eurorack.
Write-up: https://www.robotdialogs.com/2022/07/eurorack-polyphonic-envelope-generator.html
Parts
207| Qty | Value | Footprint | References |
|---|---|---|---|
| 30 | 100k | Resistor_SMD:R_1206_3216Metric_Pad1.30x1.75mm_HandSolder | R10, R11, R18, R19, R20, R21, R25, R26, R27, R43, R44, R45, R47, R53, R55, R57 +14 |
| 28 | 10nF | Capacitor_THT:C_Disc_D5.1mm_W3.2mm_P5.00mm | C3, C10, C11, C12, C13, C14, C15, C16, C17, C18, C20, C21, C23, C25, C26, C28 +12 |
| 20 | 10k | Resistor_SMD:R_1206_3216Metric_Pad1.30x1.75mm_HandSolder | R5, R7, R15, R17, R22, R23, R24, R31, R32, R33, R46, R49, R70, R71, R72, R73 +4 |
| 14 | D | Diode_THT:D_A-405_P7.62mm_Horizontal | D2, D3, D4, D5, D6, D7, D8, D9, D10, D11, D12, D13, D14, D15 |
| 13 | 1k | Resistor_SMD:R_1206_3216Metric_Pad1.30x1.75mm_HandSolder | R1, R2, R3, R12, R13, R28, R29, R30, R48, R62, R63, R68, R69 |
| 10 | 39k | Resistor_SMD:R_1206_3216Metric_Pad1.30x1.75mm_HandSolder | R34, R35, R36, R40, R41, R42, R50, R52, R54, R56 |
| 7 | 470 | Resistor_SMD:R_1206_3216Metric_Pad1.30x1.75mm_HandSolder | R74, R75, R76, R78, R81, R84, R87 |
| 5 | 1k | Potentiometer_THT:Potentiometer_Bourns_3296W_Vertical | RV1, RV2, RV3, RV4, RV5 |
| 5 | LM358 | Package_DIP:DIP-8_W7.62mm | U1, U2, U3, U4, U5 |
| 4 | 100k | Potentiometer_THT:Potentiometer_Bourns_3296W_Vertical | RV6, RV7, RV8, RV9 |
| 4 | 100k | My Stuff:Potentiometer_Alpha_RD901F-40-00D_Single_Vertical_w_3d | R_Attack1, R_Decay1, R_Release1, R_Sustain1 |
| 4 | 200k | Resistor_SMD:R_1206_3216Metric_Pad1.30x1.75mm_HandSolder | R37, R38, R39, R51 |
| 4 | 22k | Resistor_SMD:R_1206_3216Metric_Pad1.30x1.75mm_HandSolder | R91, R92, R97, R98 |
| 4 | 2N3906 | Package_TO_SOT_THT:TO-92_Inline | Q1, Q2, Q3, Q4 |
| 4 | 3.3k | Resistor_SMD:R_1206_3216Metric_Pad1.30x1.75mm_HandSolder | R93, R94, R99, R100 |
| 4 | 30k | Resistor_SMD:R_1206_3216Metric_Pad1.30x1.75mm_HandSolder | R79, R82, R85, R88 |
| 4 | 39nF | Capacitor_THT:C_Disc_D5.1mm_W3.2mm_P5.00mm | C22, C27, C32, C37 |
| 4 | 3nF | Capacitor_THT:C_Disc_D5.1mm_W3.2mm_P5.00mm | C19, C24, C29, C34 |
| 4 | 4.7k | Resistor_SMD:R_1206_3216Metric_Pad1.30x1.75mm_HandSolder | R4, R6, R14, R16 |
| 4 | AS3310 | Package_DIP:DIP-16_W7.62mm | U8, U9, U10, U11 |
| 2 | 100uF | Capacitor_THT:CP_Radial_D5.0mm_P2.50mm | C1, C2 |
| 2 | Ferrite_Bead_Small | Inductor_THT:L_Axial_L5.3mm_D2.2mm_P7.62mm_Horizontal_Vishay_IM-1 | FB1, FB2 |
| 2 | TL072 | Package_DIP:DIP-8_W7.62mm | U6, U7 |
| 2 | logo1 | My Stuff:Logo1 | LOGO1, LOGO2 |
| 1 | +12V | TestPoint:TestPoint_THTPad_D2.5mm_Drill1.2mm | TP3 |
| 1 | -12V | TestPoint:TestPoint_THTPad_D2.5mm_Drill1.2mm | TP1 |
| 1 | Attack_IN | My Stuff:Jack_2.5mm_MJ-355W_Vertical | J6 |
| 1 | Conn_02x05_Odd_Even | Connector_IDC:IDC-Header_2x05_P2.54mm_Vertical | J1 |
| 1 | Decay_IN | My Stuff:Jack_2.5mm_MJ-355W_Vertical | J7 |
| 1 | ENV_A | My Stuff:Jack_2.5mm_MJ-355W_Vertical | J11 |
| 1 | ENV_B | My Stuff:Jack_2.5mm_MJ-355W_Vertical | J10 |
| 1 | ENV_C | My Stuff:Jack_2.5mm_MJ-355W_Vertical | J12 |
| 1 | ENV_D | My Stuff:Jack_2.5mm_MJ-355W_Vertical | J13 |
| 1 | GND | TestPoint:TestPoint_THTPad_D2.5mm_Drill1.2mm | TP2 |
| 1 | Gate_A | My Stuff:Jack_2.5mm_MJ-355W_Vertical | J4 |
| 1 | Gate_B | My Stuff:Jack_2.5mm_MJ-355W_Vertical | J5 |
| 1 | Gate_C | My Stuff:Jack_2.5mm_MJ-355W_Vertical | J2 |
| 1 | Gate_D | My Stuff:Jack_2.5mm_MJ-355W_Vertical | J3 |
| 1 | Gate_SW | Button_Switch_THT:SW_PUSH_6mm_H13mm | SW1 |
| 1 | Gate_SW_2 | My Stuff:SW_PS1024ALRED | SW2 |
| 1 | LED 1 | LED_THT:LED_D3.0mm | D1 |
| 1 | LED_A | My Stuff:LED_D3.0mm | D17 |
| 1 | LED_B | My Stuff:LED_D3.0mm | D16 |
| 1 | LED_C | My Stuff:LED_D3.0mm | D18 |
| 1 | LED_D | My Stuff:LED_D3.0mm | D19 |
| 1 | Release_IN | My Stuff:Jack_2.5mm_MJ-355W_Vertical | J8 |
| 1 | Sustain_IN | My Stuff:Jack_2.5mm_MJ-355W_Vertical | J9 |
Questions
How big is the Poly envelope PCB?
It measures 90 × 100 mm and has 2 copper layers, 1.6 mm thick.
What parts does the Poly envelope use?
207 parts, built around the LM358 and TL072. 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 Poly envelope KiCad files?
From the EchelonForce/poly_envelope_pcb repository on GitHub, at the commit this page was made from: the board is poly_envelope/poly_envelope.kicad_pcb and its schematic poly_envelope/AC3310_B.kicad_sch. PCBKit opens the board in the browser, with nothing to install.
Can I use the Poly envelope design in my own project?
Its repository states no licence, so its author keeps all rights: ask EchelonForce before reusing the design.
Similar boards
- 2 layers76 × 100 mm
Vclfo10
EchelonForce/vclfo10
A Eurorack LFO design based on the Electric Druid VCLFO10 chip.
139 parts7 - 2 layers38 × 100 mm
Vca as3360-circuit
fledsbo/Modules
Eurorack module designs using KiCad — VCO, VCF, VCA, ADSR, and Daisy Seed
74 parts3 - 2 layers76 × 100 mm
Vcf as3320 lpf v1 panelized
EchelonForce/vcf_as3320_lp
This is a design for a eurorack low pass VCF using the AS3320 VCF chip.
174 parts2 - 4 layers140 × 136 mm
Vinyl adc rev d
MadsRudolph/vinyl-adc
Discrete 3rd-order delta-sigma stereo audio ADC, built from op-amps and logic gates: a four-layer Raspberry Pi HAT made by PCBWay, with KiCad files, SPICE simulations and measurements
184 parts1 - 2 layers180 × 133.3 mm
- 2 layers100 × 83.5 mm
Dual Delay
soggybag/Dual-Delay
Two PT2399 delay lines with a TWIST knob blending self and cross feedback (Super-Freq)
121 parts - 2 layers100 × 83.5 mm
Loop Echo
soggybag/Loop-Echo
A single-PT2399 delay with an effects loop in the feedback path: - only the repeats circulate through the loop; - the first echo is clean, and each later echo goes through the external effect again: fuzz degrades, a…
90 parts