2 layers149.3 × 104.5 mm
Sequencer
michd/modular-synth
Building a hardware modular synthesizer, this is where I'll collect module schematics and hardware designs.
132 parts20
2 layers75.2 × 47.2 mm
Adsr envelope generator
michd/modular-synth20Building a hardware modular synthesizer, this is where I'll collect module schematics and hardware designs.
- Size
- 75.2 × 47.2 mm
- Copper layers
- 2
- Thickness
- 1.6 mm
- Parts
- 89
- Nets
- 66
- Pads
- 263
- Tracks, vias
- 971, 86
- Pours
- 2
- Routed
- Yes
- KiCad
- KiCad 4
- Created
- 18 Jul 2015
- Updated
- 22 Nov 2020
Overview
Adsr envelope generator is an open-source printed circuit board by michd, from the michd/modular-synth repository on GitHub. It is a 2-layer board of 75.2 × 47.2 mm with 89 parts on 66 nets, routed with 971 tracks and 86 vias.
It is built around the MMBT3904. Its parts include 34 resistors, 22 capacitors, 12 diodes, 6 connectors and 5 ICs. It belongs with the audio and music boards of this library.
Main components
1README
README.mdModular Synthesizer
My fiancee and I plan to build a modular synthesizer, for fun. Here's a repository to hold all kinds of stuff to do with that. I imagine it'll hold the following
- Schematic designs
- PCB designs derived from those schematic design
- Some 3D modeling for related hardware
- Any microcontroller code
Parts
89| Qty | Value | Footprint | References |
|---|---|---|---|
| 13 | 10K | Resistors_SMD:R_0805 | R2, R3, R9, R10, R15, R16, R18, R21, R25, R27, R28, R29, R30 |
| 12 | 1N4148 | Diodes_SMD:SOD-323 | D1, D2, D3, D4, D5, D6, D7, D8, D9, D10, D11, D12 |
| 7 | 100n | Capacitors_SMD:C_0805 | C1, C2, C3, C14, C19, C20, C22 |
| 5 | MMBT3904 | TO_SOT_Packages_SMD:SOT-23 | Q1, Q2, Q3, Q4, Q5 |
| 4 | 100K | Bourns PTL:Bourns-PTL30-X | RV1, RV2, RV3, RV4 |
| 4 | 100K | Resistors_SMD:R_0805 | R17, R19, R23, R26 |
| 4 | 10u | SMD_Packages:SMD-1206_Pol | C15, C16, C17, C18 |
| 4 | 1M | Resistors_SMD:R_0805 | R12, R13, R20, R24 |
| 4 | 220R | Resistors_SMD:R_0805 | R31, R32, R33, R34 |
| 3 | 10n | Capacitors_SMD:C_0805 | C7, C8, C21 |
| 3 | 22K | Resistors_SMD:R_0805 | R6, R7, R11 |
| 3 | CONN_01X02 | Pin_Headers:Pin_Header_Straight_1x02_Pitch2.54mm | P1, P2, P6 |
| 3 | CONN_01X03 | Pin_Headers:Pin_Header_Straight_1x03_Pitch2.54mm | P3, P4, P5 |
| 2 | 100R | Resistors_SMD:R_0805 | R1, R14 |
| 2 | 100p | Capacitors_SMD:C_0805 | C4, C5 |
| 2 | 1K | Resistors_SMD:R_0805 | R5, R8 |
| 2 | 33K | Resistors_SMD:R_0805 | R4, R22 |
| 2 | 470u | Capacitors_ThroughHole:CP_Radial_D8.0mm_P3.50mm | C12, C13 |
| 2 | TL974 | SMD_Packages:SOIC-14_N | U2, U5 |
| 1 | 100u | Capacitors_ThroughHole:CP_Radial_D5.0mm_P2.00mm | C9 |
| 1 | 10K | Potentiometers:Potentiometer_Triwood_RM-065 | RV5 |
| 1 | 1n | Capacitors_SMD:C_0805 | C11 |
| 1 | 3.3u | Capacitors_ThroughHole:CP_Radial_D4.0mm_P1.50mm | C6 |
| 1 | 4001 | SMD_Packages:SOIC-14_N | U4 |
| 1 | 40106 | SMD_Packages:SOIC-14_N | U3 |
| 1 | 4066 | SMD_Packages:SOIC-14_N | U1 |
| 1 | 47u | Capacitors_ThroughHole:CP_Radial_D5.0mm_P2.00mm | C10 |
Questions
How big is the Adsr envelope generator PCB?
It measures 75.2 × 47.2 mm and has 2 copper layers, 1.6 mm thick.
What parts does the Adsr envelope generator use?
89 parts, built around the MMBT3904. 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 Adsr envelope generator KiCad files?
From the michd/modular-synth repository on GitHub, at the commit this page was made from: the board is modules/adsr-envelope-generator/kicad/adsr-envelope-generator.kicad_pcb. PCBKit opens the board in the browser, with nothing to install.
Can I use the Adsr envelope generator design in my own project?
Its repository states no licence, so its author keeps all rights: ask michd before reusing the design.
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