OTTOdac
About the OTTOdac PCB
OTTOdac is an open source PCB design by cester-ino, published on GitHub under the GPL-3.0 license. It is a 2-layer board measuring 38.8 × 66.6 mm, with 38 components from 20 distinct parts.
Other key parts include the AMS1117-3.3, SGTL5000 and LM4860. By type, the board carries 19 capacitors, 8 resistors, 5 connectors, 3 ICs, 1 crystal and 1 microphone.
It belongs with the audio and power & battery designs in this gallery.
From the project
A modular hardware for the OTTO synthesizer
- 50 key button matrix - 4 clickable color coded encoders - 1W Audio amplifier for the internal speaker - Battery management and charging circuit for the lipo/li-ion batteries and a led battery meter - Gpio breakout to allow to position the Raspberry rotated 90 degrees to access the USB ports and to easely use both the LCD screen and the audio card.
Main components on the OTTOdac
OTTOdac bill of materials (BOM)
38 components, 20 distinct parts.
| Qty | Part | Footprint | Refs |
|---|---|---|---|
| 1 | AMS1117-3.3 | SOT-223-3_TabPin2 | U1 |
| 1 | SGTL5000 | QFN-32-NXP-SGTL5000 | U2 |
| 1 | LM4860 | SOIC-16_3.9x9.9mm_P1.27mm | U3 |
| 1 | XO32 | Oscillator_SMD_Abracon_ASV-4Pin_7.0x5.1mm | X1 |
| 1 | Conn_01x10 | PinHeader_1x10_P2.54mm_Vertical | J1 |
| 1 | Audio_IN | PJ-237-6A | J2 |
| 1 | Audio_OUT | PJ-237-6A | J3 |
| 1 | SJ1-42536-SMT | PJ-393-7A | J4 |
| 1 | Speaker | JST_XH_B02B-XH-A_1x02_P2.50mm_Vertical | J5 |
| 1 | Microphone | PinHeader_1x02_P2.54mm_Vertical | MK1 |
| 1 | 600 | Fuse_0805_2012Metric | L1 |
| 8 | 2.2uf | C_0805_2012Metric | C1, C6, C7, C9, C12, C14, C15, C16 |
| 6 | 0.1uf | C_0805_2012Metric | C2, C3, C4, C5, C8, C10 |
| 2 | 220uf | CP_Elec_5x4.5 | C11, C13 |
| 1 | 1uf | CP_EIA-3216-18_Kemet-A | C17 |
| 2 | 0.1uf | CP_EIA-2012-12_Kemet-R | C18, C19 |
| 1 | 2.2K | R_0805_2012Metric | R3 |
| 3 | 1K | R_0805_2012Metric | R4, R5, R6 |
| 2 | 100K | R_0805_2012Metric | R7, R8 |
| 2 | 10K | R_0805_2012Metric | R9, R10 |
OTTOdac design files
The KiCad project lives in the cester-ino/OTTO-project repository on GitHub; these links point at the commit this page was built from.
OTTOdac: common questions
How big is the OTTOdac PCB?
The OTTOdac measures 38.8 × 66.6 mm, has 2 copper layers and is 1.6 mm thick.
How many components are on the OTTOdac?
38 components, from 20 distinct parts. The full bill of materials is listed on this page.
Where can I download the OTTOdac design files?
From the cester-ino/OTTO-project repository on GitHub, which has the KiCad layout; the links under Design files point to each one.
Can I use the OTTOdac design in my own project?
Yes, under the terms of its GPL-3.0 license, which cester-ino chose for the repository.
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