OTTO-power
About the OTTO-power PCB
OTTO-power 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 72.5 × 23.5 mm, with 43 components from 27 distinct parts.
Other key parts include the MAX8903A, MAX17048, TPS61090 and XC6210. By type, the board carries 15 capacitors, 14 resistors, 4 ICs, 4 connectors, 3 diodes and 2 inductors.
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 OTTO-power
OTTO-power bill of materials (BOM)
43 components, 27 distinct parts.
| Qty | Part | Footprint | Refs |
|---|---|---|---|
| 1 | MAX8903A | QFN-28-1EP_4x4mm_P0.4mm_EP2.4x2.4mm_ThermalVias | U1 |
| 1 | MAX17048 | TDFN-8-1EP | U2 |
| 1 | TPS61090 | QFN-16-1EP_4x4mm_P0.65mm_EP2.5x2.5mm | U3 |
| 1 | XC6210 | SOT25 | U4 |
| 1 | Barrel_Jack | BarrelJack_CUI_PJ-063AH_Horizontal | J1 |
| 1 | Conn_01x10 | PinSocket_1x10_P2.54mm_Vertical | J2 |
| 1 | USB_B_Micro | USB_Micro-B_Molex-105017-0001 | J3 |
| 1 | battery | JST_XH_B02B-XH-A_1x02_P2.50mm_Vertical | J4 |
| 1 | SW_Push | SKHHLVA010 | SW1 |
| 3 | IN4001 | D_SOD-123F | D1, D2, D3 |
| 1 | 3.3uH | L_Wuerth_MAPI-4020 | L1 |
| 1 | 6.8uH | L_Wuerth_MAPI-4020 | L2 |
| 3 | 2.2uf | C_0805_2012Metric | C1, C6, C9 |
| 1 | 1uf | C_0805_2012Metric | C2 |
| 3 | 10uf | C_0805_2012Metric | C3, C4, C11 |
| 1 | 4.7uf | C_0805_2012Metric | C5 |
| 1 | 0.15uf | C_0805_2012Metric | C7 |
| 4 | 0.1uf | C_0805_2012Metric | C8, C12, C14, C15 |
| 1 | 100uf | CP_EIA-3528-21_Kemet-B | C10 |
| 1 | 10uf | CP_EIA-3216-18_Kemet-A | C13 |
Show 7 more
| Qty | Part | Footprint | Refs |
|---|---|---|---|
| 4 | 100K | R_0805_2012Metric | R1, R2, R5, R6 |
| 1 | 1.2K | R_0805_2012Metric | R3 |
| 1 | 3K | R_0805_2012Metric | R4 |
| 2 | 200K | R_0805_2012Metric | R7, R10 |
| 2 | 1.87M | R_0805_2012Metric | R8, R9 |
| 1 | 340K | R_0805_2012Metric | R11 |
| 3 | 10K | R_0805_2012Metric | R12, R13, R14 |
OTTO-power 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.
OTTO-power: common questions
How big is the OTTO-power PCB?
The OTTO-power measures 72.5 × 23.5 mm, has 2 copper layers and is 1.6 mm thick.
How many components are on the OTTO-power?
43 components, from 27 distinct parts. The full bill of materials is listed on this page.
Where can I download the OTTO-power 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 OTTO-power 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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