2 layers33 × 90 mm
2 layers39 × 98 mm
Music Makers That Make Music
- Size
- 39 × 98 mm
- Copper layers
- 2
- Thickness
- 1.6 mm
- Parts
- 44
- Nets
- 33
- Pads
- 147
- Tracks, vias
- 276, 55
- Pours
- 2
- Routed
- Yes
- KiCad
- KiCad 5 (file 20171130)
- Created
- 25 Sep 2018
- Updated
- 18 Jan 2020
Overview
Drum is an open-source printed circuit board by o7-machinehum, from the o7-machinehum/MMTMM repository on GitHub. It is a 2-layer board of 39 × 98 mm with 44 parts on 33 nets, routed with 276 tracks and 55 vias.
It is built around the LM2904DR, 74HC74D and MIC5205-5.0YM5, with the STTH102A and MMBT3904 among its other parts. Its parts include 16 capacitors, 12 resistors, 5 ICs, 3 connectors and 2 diodes.
Main components
5
LM2904DR
SOIC-8-13V~13V -40℃~+105℃ 1mA 2 20mA 300V/ms 300nA 3nA 40nV/√Hz@1kHz 5mV 700kHz 7uV/℃ 85dB SOIC-8 Operational Amplifier ROHSUMWOperational Amplifier
74HC74D
SOIC-14-40℃~+125℃ 1 15ns 2 2V~6V 3.5pF 37ns@6V,50pF 3ns、3ns、3ns 40uA 5.2mA 5.2mA 74HC Series 82MHz Asynchronous Complementary D-Type Rising Edge Set and Reset SOIC-14 Flip Flops ROHSNexperiaFlip Flops
MIC5205-5.0YM5
SOT-23-5-40℃~+125℃@(Tj) 1 150mA 180mV@(50mA) 20V 2uA 5V 70dB@(1kHz) Fixed Over Current Protection、Over Temperature Protection Positive SOT-23-5 Voltage Regulators - Linear, Low Drop Out (LDO) Regulators ROHSTECH PUBLICVoltage Regulators - Linear, Low Drop Out (LDO) Regulators
STTH102A
SMA(DO-214AC)12ns 1A 1uA@200V 200V 40A 970mV@1A SMA(DO-214AC) Fast Recovery / High Efficiency Diodes ROHSSTMicroelectronicsFast Recovery / High Efficiency Diodes
MMBT3904
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)
README
README.mdMMM
Makers Make Music. We're designing and building 100% open source eurorack modules, we would love to hear from you! All of our designs are done in kicad, which is an open source PCB design software.
Drum (Bob Bass)
The Bob Bass takes inspiration from the 808 service manual. This guy has knobs all over the place: HPF, LPF, overdrive and control over the resonance and decay. AUDIO --- VIDEO
Logic Crusher
This is a design that conditions synth level audio into 4bit digital. These signals can then be routed through standard TTL logic and then converted back into audio. It's possible to make some very complex sounds. Here is the faceplate, patching is done through the back of the panel.
Some wavforms, the blue is the input and the yellow is the output.
The current setup... (Will be made into a module later)
Parts
44| Qty | Value | Footprint | References |
|---|---|---|---|
| 12 | 1uF | Capacitor_SMD:C_0805_2012Metric | C1, C2, C3, C4, C5, C8, C9, C10, C11, C14, C15, C16 |
| 7 | 10k | Resistor_SMD:R_0805_2012Metric | R3, R4, R5, R8, R10, R11, R12 |
| 3 | 50k | Eurocad:Alpha9mmPot | RV3, RV4, RV5 |
| 3 | LM2904DR | Package_SO:SOIC-8_3.9x4.9mm_P1.27mm | U3, U4, U5 |
| 2 | 1M | Resistor_SMD:R_0805_2012Metric | R2, R6 |
| 2 | 68nF | Capacitor_SMD:C_0805_2012Metric | C6, C7 |
| 2 | Barrel_Jack_Switch | Eurocad:PJ301M-12 | J1, J2 |
| 2 | CP1 | Capacitor_SMD:CP_Elec_3x5.3 | C12, C13 |
| 2 | STTH102A | Diode_SMD:D_SMA | D1, D2 |
| 1 | 100k | Resistor_SMD:R_0805_2012Metric | R1 |
| 1 | 1M | Eurocad:Alpha9mmPot | RV2 |
| 1 | 1k | Resistor_SMD:R_0805_2012Metric | R7 |
| 1 | 5k | Eurocad:Alpha9mmPot | RV1 |
| 1 | 5k | Resistor_SMD:R_0805_2012Metric | R9 |
| 1 | 74HC74 | Package_SO:SOIC-14_3.9x8.7mm_P1.27mm | U1 |
| 1 | Conn_02x05_Odd_Even | Connector_IDC:IDC-Header_2x05_P2.54mm_Vertical | J3 |
| 1 | MIC5205-5.0YM5 | Package_TO_SOT_SMD:SOT-23-5 | U2 |
| 1 | MMBT3904 | Package_TO_SOT_SMD:SOT-23 | Q1 |
Questions
How big is the Drum PCB?
It measures 39 × 98 mm and has 2 copper layers, 1.6 mm thick.
What parts does the Drum use?
44 parts, built around the LM2904DR, 74HC74D, MIC5205-5.0YM5 and STTH102A. 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 Drum KiCad files?
From the o7-machinehum/MMTMM repository on GitHub, at the commit this page was made from: the board is DrumModule/Drum/Drum.kicad_pcb. PCBKit opens the board in the browser, with nothing to install.
Can I use the Drum design in my own project?
Its repository states no licence, so its author keeps all rights: ask o7-machinehum before reusing the design.
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