
IPoS
peterheinrich/InternetOverSpaghetti
Transmitting IP packages over a pair of spaghetti thus demonstrating how media independent IP really is.

8 HP voltage controlled envelope generator
Adsr-3310 is an open-source printed circuit board by backtail, from the backtail/vcadsr-3310 repository on GitHub. It is a 2-layer board of 128.5 × 84.8 mm with 79 parts on 43 nets, routed with 257 tracks and 19 vias.
It is built around the LM358. Its parts include 18 resistors, 9 capacitors, 8 connectors, 3 ICs and 2 switches. It belongs with the audio and music boards of this library.
8HP Eurorack module
Voltage Contralled Envelope Generator

Rregular ADSR behaviour
up = fast, down = slowup = inv env between -5V and 0V, down = inv env between 0V and 5VUse provided submodule folder to link footprints locally in the project
| Qty | Value | Footprint | References |
|---|---|---|---|
| 10 | component-library:alien_small | , , , , , , , , , | |
| 6 | 100nF | Capacitor_SMD:C_1206_3216Metric | C1, C2, C3, C4, C5, C6 |
| 5 | 100k | Resistor_SMD:R_1206_3216Metric | R1, R4, R13, R14, R18 |
| 3 | 10k log | Potentiometer_THT:Potentiometer_Alps_RK09K_Single_Vertical | RV1, RV2, RV5 |
| 3 | 470k | Resistor_SMD:R_1206_3216Metric | R3, R6, R20 |
| 3 | 4k7 | Resistor_SMD:R_1206_3216Metric | R2, R5, R19 |
| 3 | [0V,-240mV] | TestPoint:TestPoint_Pad_1.0x1.0mm | Attack, Decay, Release |
| 2 | SW_SPDT | component-library:STMS-102-Micro_Toggle_Switch_SPDT | SW2, SW3 |
| 1 | 100k | Potentiometer_SMD:Potentiometer_Bourns_TC33X_Vertical | RV4 |
| 1 | 100k lin | Potentiometer_THT:Potentiometer_Alps_RK09K_Single_Vertical | RV3 |
| 1 | 10k | Resistor_SMD:R_1206_3216Metric | R9 |
| 1 | 140k | Resistor_SMD:R_1206_3216Metric | R12 |
| 1 | 2.5V | TestPoint:TestPoint_Pad_1.0x1.0mm | 2.5V |
| 1 | 20k | Resistor_SMD:R_1206_3216Metric | R7 |
| 1 | 2k7 | Resistor_SMD:R_1206_3216Metric | R16 |
| 1 | 30k | Resistor_SMD:R_1206_3216Metric | R8 |
| 1 | 39nF | Capacitor_SMD:C_1206_3216Metric | C9 |
| 1 | 3nF | Capacitor_SMD:C_1206_3216Metric | C7 |
| 1 | 470 | Resistor_SMD:R_1206_3216Metric | R17 |
| 1 | 56k | Resistor_SMD:R_1206_3216Metric | R15 |
| 1 | 68nF | Capacitor_SMD:C_1206_3216Metric | C8 |
| 1 | ADSR | TestPoint:TestPoint_Pad_1.0x1.0mm | ADSR |
| 1 | AS3310 | Package_DIP:DIP-16_W7.62mm_Socket | U3 |
| 1 | Blue | LED_THT:LED_D3.0mm | D1 |
| 1 | CV Attack | component-library:PJ-392 | J1 |
| 1 | CV Decay | component-library:PJ-392 | J3 |
| 1 | CV Gate | component-library:PJ-392 | J4 |
| 1 | CV Release | component-library:PJ-392 | J8 |
| 1 | CV Sustain | component-library:PJ-392 | J7 |
| 1 | Envelope | component-library:PJ-392 | J5 |
| 1 | Inverse Env | component-library:PJ-392 | J6 |
| 1 | LM358 | Package_SO:SOIC-8_3.9x4.9mm_P1.27mm | U1 |
| 1 | LOGO | frontpanel:adsr-3310 | G*** |
| 1 | Power | Connector_IDC:IDC-Header_2x05_P2.54mm_Vertical | J2 |
| 1 | TL074 | Package_SO:SOIC-14_3.9x8.7mm_P1.27mm | U2 |
| 1 | [0V,5V] | TestPoint:TestPoint_Pad_1.0x1.0mm | Sustain |
| 1 | inv. ADSR | TestPoint:TestPoint_Pad_1.0x1.0mm | ADSR |
The 64 most common of 79 parts.

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starlightk7/OpenSFC
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It measures 128.5 × 84.8 mm and has 2 copper layers, 1.6 mm thick.
79 parts, built around the LM358. 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.
From the backtail/vcadsr-3310 repository on GitHub, at the commit this page was made from: the board is KiCad_Project/adsr-3310.kicad_pcb and its schematic KiCad_Project/adsr-3310.kicad_sch. PCBKit opens the board in the browser, with nothing to install.
Its repository states no licence, so its author keeps all rights: ask backtail before reusing the design.