OtterCastAmp
About the OtterCastAmp PCB
OtterCastAmp is an open source PCB design by Ottercast, published on GitHub under the MIT license. It is a 4-layer board measuring 96 × 100 mm, with 250 components from 68 distinct parts.
Other key parts include the EMMC04G-S100-B08U, AllWinner-S3(FBGA-234), LM75B, SY8089AAAC and MP2303. By type, the board carries 112 capacitors, 89 resistors, 14 inductors, 12 ICs, 9 connectors and 7 diodes.
It belongs with the audio, iot & wireless and power & battery designs in this gallery.
From the project
OtterCastAmp is an open-source WiFi Speaker amplifier, based on a Sochip S3 SoC. Powered by any USB PD adapter for up to 100W of music.
OtterCastAmp is an open-source Sonos Amp replacement, based on a Sochip S3 SoC and pulseaudio sink/source.
We are currently planning a small batch production run, stay tuned. [editors notes: It is 2024 now and noone really expected how bad covid would affect the supply chain. While all parts are available again, we are only slowly getting interested in this project again]
Main components on the OtterCastAmp
OtterCastAmp bill of materials (BOM)
250 components, 68 distinct parts — part numbers from the project's BOM.
| Qty | Part | Footprint | Refs |
|---|---|---|---|
| 1 | EMMC04G-S100-B08U | MICRON_EMMC_153 | IC1 |
| 1 | AllWinner-S3(FBGA-234) | FBGA-234(Pitch-0.65mm_Pad-0.3mm_11x11x1.08mm) | U1 |
| 1 | LM75B | VSSOP-8_3.0x3.0mm_P0.65mm | U2 |
| 2 | SY8089AAAC | SOT-23-5 | U3, U5 |
| 1 | MP2303 | SOIC-8-1EP_3.9x4.9mm_P1.27mm_EP2.29x3mm | U4 |
| 1 | MIC5501-3.0YM5 | SOT-23-5 | U6 |
| 1 | STUSB4500 | QFN-24-1EP_4x4mm_P0.5mm_EP2.7x2.7mm | U7 |
| 1 | AP3019A | SOT-23-6 | U8 |
| 2 | TAS5825MRHB | Texas_S-PVQFN-N32_EP3.45x3.45mm | U9, U10 |
| 1 | AP6236 | LGA_44_12x12mm_0.9mm | U11 |
| 1 | DMP4015SS | SOIC-8_3.9x4.9mm_P1.27mm | Q1 |
| 1 | 32.768KHZ 32.768kHz | Crystal_SMD_3215-2Pin_3.2x1.5mm | Y1 |
| 1 | 24MHZ 24MHz | Oscillator_3225 | Y2 |
| 1 | 26MHZ 26MHz | Oscillator_3225 | Y3 |
| 1 | HR911105A | RJ45_Hanrun_HR911105A | J1 |
| 1 | Micro_SD_Card | SUNTECH_ST-TF-003A | J2 |
| 1 | C165948 USB | USB-C 16Pin | J3 |
| 1 | UART1 | PinHeader_1x03_P2.54mm_Vertical | J4 |
| 2 | C475204 | C475204 | J5, J6 |
| 1 | AFA07-S10FCC-00 | TE_1-84952-0_1x10-1MP_P1.0mm_Horizontal | J7 |
Show 48 more
| Qty | Part | Footprint | Refs |
|---|---|---|---|
| 1 | PJ-3270 | PJ-3270 | J9 |
| 1 | FH26W-33S-0.3SHW | Molex_502250-3391_2Rows-33Pins-1MP_P0.60mm_Horizontal | J10 |
| 1 | C88374 u.FL | U.FL_Molex_MCRF_73412-0110_Vertical | AE1 |
| 1 | CONFIG | SW_SPST_EVQP7C | SW1 |
| 1 | LED | LED_0603_1608Metric | 3V3 PG |
| 2 | LED | LED_0603_1608Metric | D1, D2 |
| 2 | SMAJ22A | D_SMA | D3, D4 |
| 3 | ESD5302F | SOT-23 | D5, D6, D8 |
| 1 | C1017 FERRET | R_0805 | FB1 |
| 1 | 15UH 15uH | L_10.4x10.4_H4.8 | L1 |
| 2 | 2U2 2u2 | Inductor_4040 | L2, L3 |
| 8 | 10U 10u | L_10.4x10.4_H4.8 | L4, L5, L6, L7, L8, L9, L10, L11 |
| 1 | 22U 22u | Inductor_4040 | L12 |
| 1 | 2.2UH 2.2uH | Inductor_4040 | L13 |
| 29 | 10U 10u | C_0603 | C1, C4, C6, C8, C9, C10, C12, C13 +21 |
| 3 | DNP | C_0402 | C2, C86, C87 |
| 28 | 100N 100n | C_0402 | C3, C5, C11, C16, C17, C19, C29, C39 +20 |
| 1 | 10N 10n | C_0402 | C7 |
| 1 | 3.3N 3.3n | C_0402 | C18 |
| 3 | C15849 1u 25V | C_0603 | C38, C92, C95 |
| 8 | 1u | C_0402 | C40, C41, C45, C46, C47, C64, C65, C66 |
| 4 | C14663 100n 50V | C_0603 | C48, C49, C67, C68 |
| 9 | C170149 470n 25V | C_0603 | C50, C52, C56, C60, C69, C71, C75, C79 +1 |
| 8 | C307578 680n 50V | C_1206_3216Metric | C51, C53, C57, C61, C70, C72, C76, C80 |
| 5 | C12891 22u 50V | C_1206_3216Metric | C54, C55, C73, C74, C115 |
| 5 | C3350 470u 35V | CP_Elec_10x10.5 | C58, C59, C77, C78, C116 |
| 5 | 18P 18p | C_0402 | C85, C105, C106, C109, C113 |
| 1 | C35216 1n 2kV | C_1206_3216Metric | C96 |
| 2 | 22PF 22pF | C_0402 | C117, C118 |
| 20 | 47K 47k | R_0402 | R1, R2, R4, R9, R10, R11, R13, R14 +12 |
| 6 | 22 | R_0402 | R3, R12, R25, R53, R59, R64 |
| 13 | 2.2K 2.2k | R_0402 | R5, R6, R7, R8, R28, R36, R62, R63 +5 |
| 9 | 100K 100k | R_0402 | R16, R17, R23, R24, R26, R33, R34, R35 +1 |
| 1 | 68K 68k | R_0402 | R19 |
| 1 | 15K 15k | R_0402 | R21 |
| 2 | 5.6K 5.6k | R_0402 | R22, R75 |
| 4 | 100R | R_0402 | R27, R54, R55, R56 |
| 1 | 22K 22k | R_0402 | R29 |
| 2 | 1k | R_0402 | R30, R46 |
| 8 | C17168 0R | R_0402 | R31, R32, R40, R41, R60, R86, R87, R88 |
| 8 | 10K 10k | R_0402 | R37, R38, R39, R42, R43, R44, R65, R82 |
| 3 | DNP | R_0402 | R45, R68, R71 |
| 4 | 51 | R_0402 | R66, R67, R69, R70 |
| 2 | 200K 200k | R_0402 | R72, R73 |
| 1 | 6K04 6k04 | R_0402 | R74 |
| 1 | 10M | R_0402 | R76 |
| 2 | 240 | R_0402 | R80, R81 |
| 1 | 10R | R_0402 | R83 |
OtterCastAmp design files
The KiCad project lives in the Ottercast/OtterCastAmp repository on GitHub; these links point at the commit this page was built from.
OtterCastAmp: common questions
How big is the OtterCastAmp PCB?
The OtterCastAmp measures 96 × 100 mm, has 4 copper layers and is 1.6 mm thick.
How many components are on the OtterCastAmp?
250 components, from 68 distinct parts, with part numbers taken from the project's own BOM. The full bill of materials is listed on this page.
Where can I download the OtterCastAmp design files?
From the Ottercast/OtterCastAmp repository on GitHub, which has the KiCad layout and the BOM; the links under Design files point to each one.
Can I use the OtterCastAmp design in my own project?
Yes, under the terms of its MIT license, which Ottercast chose for the repository.
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