2 layers104 × 158 mm
4 layers104 × 158 mm
A quad function generator project
- Size
- 104 × 158 mm
- Copper layers
- 4
- Thickness
- 1.6 mm
- Parts
- 380
- Nets
- 268
- Pads
- 985
- Tracks, vias
- 1,987, 186
- Pours
- 4
- Routed
- Yes
- KiCad
- KiCad 5 (file 20171130)
- Created
- 13 May 2020
- Updated
- 29 Jun 2020
Overview
281D is an open-source printed circuit board by DunningtonAudio, from the DunningtonAudio/281D repository on GitHub, published under the GPL-3.0 licence. It is a 4-layer board of 104 × 158 mm with 380 parts on 268 nets, routed with 1,987 tracks and 186 vias.
It is built around the LM13700M, TL072 and L78L10ACU, with the BAT54WS, BAT54C and MMBT3904 among its other parts. Its parts include 206 resistors, 46 capacitors, 37 diodes, 26 connectors and 16 ICs.
Main components
9
LM13700M
SOIC-16-16V~-4.75V、4.75V~16V 0℃~+70℃ 110dB 2 2.6mA 20mA 400nA 4mV 50V/us 600nA 9.5V~32V SOIC-16 Operational Amplifier ROHSTexas InstrumentsOperational Amplifier
TL072
SOP-8-18V~18V 0℃~+70℃ 1.4mA 1.5nA 10V/us 10mV 2 2.5nA 3MHz 85dB SOP-8 Operational Amplifier ROHSGcoreOperational Amplifier
L78L10ACU
SOT-89-30℃~+125℃@(Tj) 1 1.7V@(40mA) 100mA 10V 23V 45dB@(120Hz) 60uV 6mA Fixed Over Temperature Protection、Short Circuit Protection Positive SOT-89-3 Voltage Regulators - Linear, Low Drop Out (LDO) Regulators ROHSSTMicroelectronicsVoltage Regulators - Linear, Low Drop Out (LDO) Regulators
BAT54WS
SOD-3231 Independent 100mA 1V@100mA 2uA@25V 30V 600mA SOD-323 Schottky Diodes ROHSDiodes IncorporatedSchottky Diodes
BAT54C
SOT-231 Pair Common Cathode 200mA 2uA@25V 30V 600mA 800mV@100mA SOT-23 Schottky Diodes ROHSNexperiaSchottky DiodesMMBT3904
SOT-23-55℃~+150℃ 1 NPN 100 100nA 200mA 200mW 300MHz 300mV 40V 6V NPN SOT-23 Bipolar (BJT) ROHSJiangsu Changjing Electronics Technology (CJ)Bipolar (BJT)
DMMT3906W
SOT-363-65℃~+150℃ 100 2 PNP 200mA 200mW 250MHz 400mV 40V 50nA 5V PNP SOT-363 Bipolar (BJT) ROHSDiodes IncorporatedBipolar (BJT)
MMBFJ201
SOT-23-3L-55℃~+150℃ 1mA 300mV 350mW 40V N-Channel SOT-23-3L JFETs ROHSonsemiJFETsM2.5
-0.45mm 2.5mm 2mm 5mm DIN934 Hex M2.5X0.45 Nickel plated Silver white - Hexagonal nutsShuntianHex Nut
README
README.md281D
A quad function generator project
The 281D Quad Function Generator is designed to replicate the functionality of the Buchla 281 module using modern construction techniques and readily available parts. It is primarily based on the original circuit designed by Don Buchla, with the following additions/alterations:
- Improved input and mode selection circuitry – no requirement to “kick” the generators when selecting self cycle mode.
- All outputs are buffered, protecting the integrator core and passive end pulse generation from the effects of loading when stacked to multiple inputs.
- End pulse outputs are designed to allow stacking of multiple outputs to a single input without affecting cycling of individual generators, allowing the creation of complex/non-repeating/polyrhythmic pulse sequences. Unlike other solutions that simply add a diode in series with the output, the 281D end pulse outputs can drive a floating input low.
There are several build options to adjust the function of the module to a particular users requirements.
The repository contains:
- KiCad project files.
- Schematic and build/calibration notes as PDF files.
- Bill of Materials in ODS format.
- Interactive webpage for matching BOM items to PCB locations.
Parts
380| Qty | Value | Footprint | References |
|---|---|---|---|
| 30 | 47k | Resistor_SMD:R_0805_2012Metric | R104, R108, R109, R113, R114, R121, R125, R149, R204, R208, R209, R213, R214, R221, R225, R304 +14 |
| 26 | 100n | Capacitor_SMD:C_0805_2012Metric | C111, C112, C113, C114, C115, C116, C117, C118, C211, C212, C213, C311, C312, C313, C314, C315 +10 |
| 24 | 4k7 | Resistor_SMD:R_0805_2012Metric | R102, R119, R129, R130, R131, R132, R202, R219, R229, R230, R231, R232, R302, R319, R329, R330 +8 |
| 22 | 100k | Resistor_SMD:R_0805_2012Metric | R101, R111, R112, R138, R141, R150, R201, R211, R212, R238, R241, R301, R311, R312, R338, R341 +6 |
| 20 | 49k9 | Resistor_SMD:R_0805_2012Metric | R105, R107, R115, R117, R135, R205, R207, R215, R217, R235, R305, R307, R315, R317, R335, R405 +4 |
| 18 | 10k | Resistor_SMD:R_0805_2012Metric | R126, R136, R143, R146, R152, R226, R236, R243, R246, R326, R336, R343, R346, R352, R426, R436 +2 |
| 18 | 1k | Resistor_SMD:R_0805_2012Metric | R110, R116, R144, R147, R153, R210, R216, R244, R247, R310, R316, R344, R347, R353, R410, R416 +2 |
| 18 | BAT54WS | Diode_SMD:D_SOD-323 | D103, D104, D108, D109, D199, D203, D204, D208, D299, D303, D304, D308, D309, D399, D403, D404 +2 |
| 13 | 22k | Resistor_SMD:R_0805_2012Metric | R2, R128, R133, R140, R228, R233, R240, R328, R333, R340, R428, R433, R440 |
| 12 | 47n | Capacitor_SMD:C_0805_2012Metric | C102, C103, C199, C202, C203, C299, C302, C303, C399, C402, C403, C499 |
| 12 | 4M7 | Resistor_SMD:R_0805_2012Metric | R118, R120, R199, R218, R220, R299, R318, R320, R399, R418, R420, R499 |
| 12 | 680R | Resistor_SMD:R_0805_2012Metric | R123, R124, R127, R223, R224, R227, R323, R324, R327, R423, R424, R427 |
| 10 | 11k | Resistor_SMD:R_0805_2012Metric | R142, R145, R151, R242, R245, R342, R345, R351, R442, R445 |
| 8 | 108-0903-001 | Buchla_Connectors:Johnson_108-09XX-001 | J102, J103, J202, J203, J302, J303, J402, J403 |
| 8 | 10kB | Alpha_Potentiometers:RV16AF-41-(L)R1-XXX | VR101, VR102, VR201, VR202, VR301, VR302, VR401, VR402 |
| 6 | 108-0910-001 | Buchla_Connectors:Johnson_108-09XX-001 | J105, J106, J205, J305, J306, J405 |
| 6 | 5k6 | Resistor_SMD:R_0805_2012Metric | R106, R148, R206, R306, R348, R406 |
| 6 | BAT54C | Package_TO_SOT_SMD:SOT-23 | D101, D107/207, D201, D301, D307/407, D401 |
| 6 | TL074 | Package_SO:SOIC-14_3.9x8.7mm_P1.27mm | U101, U105/205, U201, U301, U305/405, U401 |
| 5 | 6k8 | Resistor_SMD:R_0805_2012Metric | R1, R134, R234, R334, R434 |
| 5 | MMBT3904 | Package_TO_SOT_SMD:SOT-23 | Q1, Q103, Q203, Q303, Q403 |
| 5 | Red_3mm | LED_THT:LED_D3.0mm | D1, D105, D205, D305, D405 |
| 5 | SPDT_ON-OFF-ON | NKK:M201xSS1x01 | SW1, SW101, SW201, SW301, SW401 |
| 4 | 108-0902-001 | Buchla_Connectors:Johnson_108-09XX-001 | J104, J204, J304, J404 |
| 4 | 108-0906-001 | Buchla_Connectors:Johnson_108-09XX-001 | J101, J201, J301, J401 |
| 4 | 150k | Resistor_SMD:R_0805_2012Metric | R122, R222, R322, R422 |
| 4 | 15k | Resistor_SMD:R_0805_2012Metric | R103, R203, R303, R403 |
| 4 | 1M | Resistor_SMD:R_0805_2012Metric | R139, R239, R339, R439 |
| 4 | 220n | Capacitor_SMD:C_2416_6041Metric | C101, C201, C301, C401 |
| 4 | 220n | Capacitor_THT:C_Rect_L7.0mm_W2.5mm_P5.00mm | C_101, C_201, C_301, C_401 |
| 4 | 22u | Capacitor_SMD:CP_Elec_5x5.3 | C1, C2, C3, C5 |
| 4 | 4001 | Package_SO:SOIC-14_3.9x8.7mm_P1.27mm | U102, U202, U302, U402 |
| 4 | 470k | Resistor_SMD:R_0805_2012Metric | R137, R237, R337, R437 |
| 4 | 50k | Potentiometer_SMD:Potentiometer_Bourns_3314J_Vertical | TR101, TR201, TR301, TR401 |
| 4 | DMMT3906W | Package_TO_SOT_SMD:SOT-363_SC-70-6 | Q101, Q201, Q301, Q401 |
| 4 | MMBFJ201 | Package_TO_SOT_SMD:SOT-23 | Q102, Q202, Q302, Q402 |
| 4 | SZMM3Z10VST1G | Diode_SMD:D_SOD-323 | D102, D202, D302, D402 |
| 4 | Yel_3mm | LED_THT:LED_D3.0mm | D106, D206, D306, D406 |
| 3 | 10u | Inductor_SMD:L_0805_2012Metric | L1, L2, L3 |
| 3 | M3 | MountingHole:MountingHole_3.2mm_M3_Pad_Via | FIX_1, FIX_2, FIX_3 |
| 2 | 100kB | Alpha_Potentiometers:RD901F-40-00D | VR203, VR403 |
| 2 | 4066 | Package_SO:SOIC-14_3.9x8.7mm_P1.27mm | U103/203, U303/403 |
| 2 | LM13700 | Package_SO:SOIC-16_3.9x9.9mm_P1.27mm | U104/204, U304/404 |
| 2 | M2.5 | MountingHole:MountingHole_2.5mm | H101, H102 |
| 2 | SPDT_ON-ON | NKK:M201xSS1x01 | SW102, SW302 |
| 1 | +12V | Connector_Wire:SolderWirePad_1x01_Drill1.2mm | J4 |
| 1 | +15V | Connector_Wire:SolderWirePad_1x01_Drill1.2mm | J3 |
| 1 | -15V | Connector_Wire:SolderWirePad_1x01_Drill1.2mm | J2 |
| 1 | L78L10 | Package_TO_SOT_SMD:SOT-89-3 | U1 |
| 1 | Logo_150mil | Dunnington:Logo_150mil | M1 |
| 1 | Mod_Indicator_1-10_150mil | Dunnington:Mod_Indicator_1-10_150mil | M2 |
| 1 | Q | Connector_Wire:SolderWirePad_1x01_Drill1.2mm | J1 |
| 1 | Serial_Box_150mil | Dunnington:Serial_Box_150mil | M3 |
| 1 | TL072 | Package_SO:SOIC-8_3.9x4.9mm_P1.27mm | U2 |
Questions
How big is the 281D PCB?
It measures 104 × 158 mm and has 4 copper layers, 1.6 mm thick.
What parts does the 281D use?
380 parts, built around the LM13700M, TL072, L78L10ACU and BAT54WS. 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 281D KiCad files?
From the DunningtonAudio/281D repository on GitHub, at the commit this page was made from: the board is 281D.kicad_pcb. PCBKit opens the board in the browser, with nothing to install.
Can I use the 281D design in my own project?
Its repository publishes it under the GPL-3.0 licence: you may reuse it on that licence's terms (keep the author's notice, and for a copyleft licence share your changes alike).
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