
Theremin
harrydshill/LittleTheremin
A small fully-analogue theremin, with pitch and volume control

Eurorack filter module based on Mutable Instruments Ripples
Sil is an open-source printed circuit board by algesten, from the algesten/sil repository on GitHub. It is a 2-layer board of 68 × 128.5 mm with 140 parts on 98 nets, routed with 762 tracks and 216 vias.
It is built around the OPA1679ID, LM13700M and MMBT3906. Its parts include 62 resistors, 44 capacitors, 9 ICs, 9 connectors and 6 diodes.
| Qty | Value | Footprint | References |
|---|---|---|---|
| 24 | 33.2k | Resistor_SMD:R_0402_1005Metric | R1, R2, R13, R15, R20, R25, R26, R34, R35, R37, R39, R42, R44, R45, R46, R48 +8 |
| 16 | 100n | Capacitor_SMD:C_0402_1005Metric | C2, C7, C11, C12, C15, C18, C19, C20, C23, C24, C28, C29, C41, C42, C43, C44 |
| 12 | 560pF | Capacitor_SMD:C_0402_1005Metric | C1, C3, C4, C5, C21, C22, C25, C30, C36, C37, C38, C39 |
| 8 | 220pF | Resistor_SMD:R_0603_1608Metric | C8, C9, C13, C14, C32, C33, C34, C35 |
| 8 | 510 | Resistor_SMD:R_0402_1005Metric | R3, R4, R6, R11, R52, R53, R54, R55 |
| 6 | 100k | Resistor_SMD:R_0402_1005Metric | R17, R24, R30, R36, R40, R64 |
| 4 | 1.50k | Resistor_SMD:R_0402_1005Metric | R22, R27, R56, R59 |
| 4 | 1N4148 | Diode_SMD:D_SOD-523 | D3, D4, D5, D6 |
| 4 | 51k | Resistor_SMD:R_0402_1005Metric | R10, R14, R32, R33 |
| 3 | 22pF | Capacitor_SMD:C_0402_1005Metric | C26, C27, C31 |
| 3 | OPA1679 | Package_SO:TSSOP-14_4.4x5mm_P0.65mm | IC2, IC7, IC9 |
| 2 | 16.2k | Resistor_SMD:R_0402_1005Metric | R18, R38 |
| 2 | 1N5819 | Diode_SMD:D_SOD-123 | D1, D2 |
| 2 | 22k | Resistor_SMD:R_0402_1005Metric | R9, R31 |
| 2 | 22uF | Capacitor_SMD:CP_Elec_5x5.4 | C6, C10 |
| 2 | 4.7uF | Capacitor_SMD:C_1206_3216Metric | C16, C40 |
| 2 | 5k | Eurocad:bourns trimpot | R23, R41 |
| 2 | 820 | Resistor_SMD:R_0402_1005Metric | R19, R21 |
| 2 | FerriteBead | Resistor_SMD:R_0402_1005Metric | L1, L2 |
| 2 | LM4040B10 | Package_TO_SOT_SMD:SOT-23 | IC3, IC4 |
| 2 | M3 | Eurocad:M3 Screw | Screw1, Screw2 |
| 2 | MMBT3906 | Package_TO_SOT_SMD:SOT-523 | Q1, Q2 |
| 2 | V2164SZ | Package_SO:SOIC-16_4.55x10.3mm_P1.27mm | IC1, IC8 |
| 1 | 1.0k | Resistor_SMD:R_0603_1608Metric | R67 |
| 1 | 100k | Eurocad:bourns trimpot | R43 |
| 1 | 30k | Resistor_SMD:R_0402_1005Metric | R60 |
| 1 | 4.7uF | Resistor_SMD:R_1206_3216Metric | C17 |
| 1 | 68k | Resistor_SMD:R_0402_1005Metric | R47 |
| 1 | AUDIO IN | Eurocad:PJ301M-12 | J4 |
| 1 | AUDIO OUT | Eurocad:PJ301M-12 | J9 |
| 1 | CV IN HP | Eurocad:PJ301M-12 | J7 |
| 1 | CV IN LP | Eurocad:PJ301M-12 | J5 |
| 1 | Conn_01x03_Male | Connector_PinHeader_2.54mm:PinHeader_1x03_P2.54mm_Vertical | J8 |
| 1 | Conn_01x08_Female | Connector_PinSocket_2.54mm:PinSocket_1x11_P2.54mm_Vertical | J2 |
| 1 | Conn_01x11_Male | Connector_PinHeader_2.54mm:PinHeader_1x11_P2.54mm_Vertical | J1 |
| 1 | FREQ HP 10kB | Eurocad:Alpha9mmPot | R28 |
| 1 | FREQ LP 10kB | Eurocad:Alpha9mmPot | R16 |
| 1 | LM13700 | Package_SO:SOIC-16_3.9x9.9mm_P1.27mm | IC5 |
| 1 | LOGO | LOGO | G*** |
| 1 | M05X2SHD | Eurocad:Power_small | JP1 |
| 1 | RESO HP 10kB | Eurocad:Alpha9mmPot | R12 |
| 1 | RESO IN HP | Eurocad:PJ301M-12 | J6 |
| 1 | RESO IN LP | Eurocad:PJ301M-12 | J3 |
| 1 | RESO LP 10kB | Eurocad:Alpha9mmPot | R29 |
| 1 | TL074 | Package_SO:TSSOP-14_4.4x5mm_P0.65mm | IC6 |
| 1 | mbot | Eurocad:Mounting hole | Mount2 |
| 1 | mtop | Eurocad:Mounting hole | Mount1 |
It measures 68 × 128.5 mm and has 2 copper layers, 1.6 mm thick.
140 parts, built around the OPA1679ID, LM13700M and MMBT3906. 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 algesten/sil repository on GitHub, at the commit this page was made from: the board is sil.kicad_pcb and its schematic sil.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 algesten before reusing the design.

harrydshill/LittleTheremin
A small fully-analogue theremin, with pitch and volume control

mzuelch/CATs-Eurosynth
Analog Synth Eurorack Modules




Thorinair/Avalon-Harmonics
A collection of Avalon Harmonics branded synthesizer modules.

