EnvelopeFollower
About the EnvelopeFollower PCB
EnvelopeFollower is an open source PCB design by eddcad, published on GitHub under the GPL-3.0 license. It is a 2-layer board measuring 138 × 114 mm, with 66 components from 37 distinct parts.
Other key parts include the TL074 and LM1458. By type, the board carries 23 resistors, 20 capacitors, 7 diodes, 4 switches, 2 ICs and 2 LEDs.
It belongs with the audio designs in this gallery.
From the project
Clone of Lovetone's Meatball modified to fit in a Hammond 1590XX enclosure.
Main components on the EnvelopeFollower
EnvelopeFollower bill of materials (BOM)
66 components, 37 distinct parts.
| Qty | Part | Footprint | Refs |
|---|---|---|---|
| 1 | TL074 | DIP-14_W7.62mm | U1 |
| 1 | LM1458 | DIP-8_W7.62mm | U2 |
| 1 | COLOUR B100k | Potentiometer_Omeg_PC16BU_Vertical | RV1 |
| 1 | SENSITIVITY B10k | Potentiometer_Omeg_PC16BU_Vertical | RV2 |
| 1 | BLEND B10k | Potentiometer_Omeg_PC16BU_Vertical | RV3 |
| 1 | ATTACK B5K | Potentiometer_Omeg_PC16BU_Vertical | RV4 |
| 1 | DECAY A100K | Potentiometer_Omeg_PC16BU_Vertical | RV5 |
| 1 | INTENSITY B1K | Potentiometer_Omeg_PC16BU_Vertical | RV6 |
| 1 | RANGE | 3p4tRotary | S1 |
| 1 | UP/DOWN | 3p4tRotary | S2 |
| 1 | BANDWIDTH | LORINCK1049 | SW2 |
| 1 | MODE | LORINCK1049 | SW3 |
| 2 | D_LDR | R_LDR_5.2x5.2mm_P3.5mm_Horizontal | V1R1, V2R1 |
| 2 | D_Photo | LED_D5.0mm | V1D1, V2D1 |
| 1 | 1N4001 | D_DO-41_SOD81_P10.16mm_Horizontal | D1 |
| 4 | 1N4148 | D_DO-35_SOD27_P7.62mm_Horizontal | D2, D3, D4, D5 |
| 2 | LED | LED_D5.0mm | D6, D7 |
| 4 | 10u | CP_Radial_D5.0mm_P2.00mm | C1, C14, C17, C20 |
| 1 | 47u | CP_Radial_D5.0mm_PWideForPower | C2 |
| 2 | 22n | C_Rect_L7.0mm_W2.5mm_P5.00mm | C3, C18 |
Show 17 more
| Qty | Part | Footprint | Refs |
|---|---|---|---|
| 3 | 470n | C_Rect_L7.0mm_W3.5mm_P5.00mm | C4, C15, C19 |
| 1 | 47u | CP_Radial_D5.0mm_P2.00mm | C5 |
| 2 | 15n | C_Rect_L7.0mm_W2.5mm_P5.00mm | C6, C10 |
| 2 | 6n8 | C_Rect_L7.0mm_W2.5mm_P5.00mm | C7, C11 |
| 2 | 3n3 | C_Rect_L7.0mm_W2.5mm_P5.00mm | C8, C12 |
| 3 | 2n2 | C_Rect_L7.0mm_W2.5mm_P5.00mm | C9, C13, C16 |
| 3 | 1k5 | R_Axial_DIN0207_L6.3mm_D2.5mm_P7.62mm_Horizontal | R1, R11, R18 |
| 3 | 10k | R_Axial_DIN0207_L6.3mm_D2.5mm_P7.62mm_Horizontal | R2, R3, R8 |
| 2 | 100k | R_Axial_DIN0207_L6.3mm_D2.5mm_P7.62mm_Horizontal | R4, R13 |
| 3 | 22k | R_Axial_DIN0207_L6.3mm_D2.5mm_P7.62mm_Horizontal | R5, R6, R15 |
| 1 | 220k | R_Axial_DIN0207_L6.3mm_D2.5mm_P7.62mm_Horizontal | R7 |
| 1 | 120k | R_Axial_DIN0207_L6.3mm_D2.5mm_P7.62mm_Horizontal | R9 |
| 2 | 1M8 | R_Axial_DIN0207_L6.3mm_D2.5mm_P7.62mm_Horizontal | R10, R16 |
| 1 | 4k7 | R_Axial_DIN0207_L6.3mm_D2.5mm_P7.62mm_Horizontal | R12 |
| 3 | 330r | R_Axial_DIN0207_L6.3mm_D2.5mm_P7.62mm_Horizontal | R14, R21, R22 |
| 3 | 100r | R_Axial_DIN0207_L6.3mm_D2.5mm_P7.62mm_Horizontal | R17, R19, R20 |
| 1 | 2k2 | R_Axial_DIN0207_L6.3mm_D2.5mm_P7.62mm_Horizontal | R23 |
EnvelopeFollower design files
The KiCad project lives in the eddcad/EnvelopeFollower repository on GitHub; these links point at the commit this page was built from.
EnvelopeFollower: common questions
How big is the EnvelopeFollower PCB?
The EnvelopeFollower measures 138 × 114 mm, has 2 copper layers and is 1.6 mm thick.
How many components are on the EnvelopeFollower?
66 components, from 37 distinct parts. The full bill of materials is listed on this page.
Where can I download the EnvelopeFollower design files?
From the eddcad/EnvelopeFollower repository on GitHub, which has the KiCad layout; the links under Design files point to each one.
Can I use the EnvelopeFollower design in my own project?
Yes, under the terms of its GPL-3.0 license, which eddcad chose for the repository.
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