4 layers100 × 75 mm
4 layers160 × 80 mm
Amos
des256/pcbsMaking electronics as well
- Size
- 160 × 80 mm
- Copper layers
- 4
- Thickness
- 1.59 mm
- Parts
- 401
- Nets
- 324
- Pads
- 1,342
- Tracks, vias
- 2,491, 387
- Pours
- 47
- Routed
- Yes
- KiCad
- KiCad 10.0 (file 20260206)
- Created
- 10 Oct 2026
- Updated
- 23 Oct 2026
Overview
Amos is an open-source printed circuit board by des256, from the des256/pcbs repository on GitHub. It is a 4-layer board of 160 × 80 mm with 401 parts on 324 nets, routed with 2,491 tracks and 387 vias.
It is built around the SN74LVC2G241DCU, SP3485EN-L/TR and TLV62569DBVR-TP, with the B4B-EH-A(LF)(SN), TPS2553DBVR-1 and CSD18532Q5B among its other parts. Its parts include 153 capacitors, 96 resistors, 31 diodes, 27 ICs and 5 transistors.
Main components
12
SN74LVC2G241DCU
VSSOP-8-40℃~+85℃ 1 1.65V~5.5V 10uA 2 32mA 32mA 4.1ns@3.3V,50pF 74LVC Power-off isolation、Output enable Tri-State Unidirectional VSSOP-8 Buffers, Drivers, Receivers, Transceivers ROHSTexas InstrumentsBuffers, Drivers, Receivers, Transceivers
SP3485EN-L/TR
SOIC-8-40℃~+85℃ 1 1 10Mbps 2mA 3.3V 32 Half-Duplex Transceiver SOIC-8 RS-485 / RS-422 ICs ROHSMaxLinearRS-485 / RS-422 ICs
TLV62569DBVR-TP
SOT-23-51 1.5MHz 2.7V~5.5V 2A 40uA Adjustable Buck Built-in No SOT-23-5 DC-DC Converters ROHSTECH PUBLICDC-DC Converters
B4B-EH-A(LF)(SN)
插件,P=2.5mm-25℃~+85℃ 1 12.5mm 1x4P 2.5mm 250V 3.8mm 3A 4 4P 6mm Brass EH K Pin PA66 Through Hole Tin UL94V-0 White 插件,P=2.5mm Wire To Board Connector ROHSJSTWire To Board Connector
TPS2553DBVR-1
SOT-23-6-40℃~+150℃ 1 1.5A 2.5V~6.5V 85mΩ Active High High Side Switch 过压保护、软启动、欠压锁定、反向电压保护、集成电荷泵、Overcurrent Protection、Over temperature protection、锁存保护、Short-Circuit Protection、反向电流阻断 SOT-23-6 Power Distribution Switches ROHSTexas InstrumentsPower Distribution Switches
CSD18532Q5B
SON-8(5x6)-55℃~+150℃ 1 N-channel 1.8V 100A 156W 17pF 2.5mΩ@10V 44nC@10V 5.07nF 60V 611pF N-Channel SON-8(5x6) MOSFETs ROHSTexas InstrumentsMOSFETs
TPD4E05U06DQAR
USON-10-40℃~+125℃ 0.5pF 10nA 14V 2.5A@8/20us 40W@8/20us 5.5V 6.5V ESD Four channels IEC 61000-4-2、IEC 61000-4-5、IEC 61000-4-4 Unidirectional USON-10(1x2.5) ESD and Surge Protection (TVS/ESD) ROHSTexas InstrumentsESD Protection DevicesUSBLC6-2SC6
SOT-23-60.35pF、0.8pF 100nA 150W@8/20us 15V 2 5V 6A@8/20us 6V ESD SOT-23-6 ESD and Surge Protection (TVS/ESD) ROHSUMWESD And Surge Protection (TVS/ESD)
PZ254V-11-03P
插件,P=2.54mm-40℃~+105℃ 1 1x3P 2.54mm 2.5mm 250V 3A 3P 3mm 6mm Black Brass Pin Header Through Hole 插件,P=2.54mm Pin Headers ROHSXFCNPin Headers
B3B-EH-A(LF)(SN)
插件,P=2.5mm-25℃~+85℃ 1 10mm 1x3P 2.5mm 250V 3 3.8mm 3A 3P 6mm Brass EH K Pin PA66 Through Hole Tin UL94V-0 White 插件,P=2.5mm Wire To Board Connector ROHSJSTWire To Board Connector
PSM712-LF-T7
SOT-23-55℃~+150℃ 12V 13.3V 19V 1uA、20uA 30A@8/20us、34A@8/20us 600W@8/20us 75pF IEC 61000-4-2、IEC 61000-4-5、IEC 61000-4-4 TVS Unidirectional SOT-23 ESD and Surge Protection (TVS/ESD) ROHSPROTEKESD And Surge Protection (TVS/ESD)
PZ254V-11-02P
插件,P=2.54mm-40℃~+105℃ 1 1x2P 2.54mm 2.5mm 250V 2P 3A 3mm 6.1mm Black Brass Gold Square pin Through Hole Plugin,P=2.54mm Pin Headers ROHSXFCNPin Headers
README
amos/README.mdAmos
Jetson helper board (USB3 + 12V RS-485 Servo + 5V UART Servo)
Input Power: 19V laptop Output Power: 19V jetson + 12V (10A..20A) servo + 5V (5A..10A) servo + 5V (5A) USB
Upstream USB Hub: USB3-C Downstream USB Hub: 3x USB3-A + 1x internal to CH344Q
each servo bus either 12V 4-pin RS-485 or 5V 3-pin UART selectable with DIP
Schematic Sheets
2: Main Power + Jetson 3: Buck 12V 10A..20A 4: Buck 5V 5A..10A 5: Buck 5V USB 6: Buck 3V3 + 1V1 7: USB HUB 8: CH344Q 9: Servo A 10: Servo B 11: Servo C 12: Servo D 13: USB A 14: USB B 15: USB C
Parts
401| Qty | Value | Footprint | References |
|---|---|---|---|
| 66 | 100nF | Capacitor_SMD:C_0402_1005Metric | C1001, C1002, C1005, C1006, C1007, C1008, C1009, C1101, C1102, C1105, C1106, C1107, C1108, C1109, C1201, C1202 +50 |
| 18 | 100k | Resistor_SMD:R_0402_1005Metric | R602, R612, R904, R906, R1004, R1006, R1008, R1009, R1104, R1106, R1108, R1109, R1204, R1206, R1208, R1209 +2 |
| 14 | 10k | Resistor_SMD:R_0402_1005Metric | R201, R703, R705, R706, R707, R708, R801, R911, R1011, R1111, R1211, R1301, R1401, R1501 |
| 10 | 47uF 16V | Capacitor_SMD:C_1210_3225Metric | C315, C316, C317, C318, C508, C509, C510, C511, C512, C513 |
| 9 | 2.2uF 100V | Capacitor_SMD:C_1210_3225Metric | C415, C416, C417, C418, C419, C504, C505, C506, C507 |
| 9 | 47uF 10V | Capacitor_SMD:C_1206_3216Metric | C420, C421, C422, C423, C424, C425, C1301, C1401, C1501 |
| 7 | 10uF | Capacitor_SMD:C_0805_2012Metric | C703, C708, C718, C808, C1307, C1409, C1511 |
| 5 | 1M | Resistor_SMD:R_0402_1005Metric | R702, R1303, R1403, R1503, R1602 |
| 5 | 1k | Resistor_SMD:R_0402_1005Metric | R406, R411, R507, R603, R802 |
| 5 | 22uF | Capacitor_SMD:C_0805_2012Metric | C602, C607, C608, C612, C717 |
| 5 | 4.7k | Resistor_SMD:R_0402_1005Metric | R311, R803, R804, R805, R806 |
| 5 | 4.7uF 100V | Capacitor_SMD:C_1210_3225Metric | C310, C311, C312, C313, C314 |
| 5 | CSD18532Q5B | easyeda2kicad:SON-8_L5.0-W6.0-P1.27-BL-1 | Q201, Q301, Q302, Q401, Q402 |
| 5 | LED Green | LED_SMD:LED_0805_2012Metric | D202, D302, D402, D502, D601 |
| 5 | TPD4E05U06DQAR_C138714 | easyeda2kicad:USON-10_L2.5-W1.0-P0.50-BL | D704, D706, D1301, D1401, D1501 |
| 5 | USBLC6-2SC6 | easyeda2kicad:SOT-23-6_L2.9-W1.6-P0.95-LS2.8-BL | D705, D801, D1302, D1402, D1502 |
| 4 | 1.02k | Resistor_SMD:R_0402_1005Metric | R907, R1007, R1107, R1207 |
| 4 | 120 | easyeda2kicad:R_0603 | R912, R1012, R1112, R1212 |
| 4 | 12=RS-485, 23=TTL | Connector_PinHeader_2.54mm:PinHeader_1x03_P2.54mm_Vertical | JP902, JP1002, JP1102, JP1202 |
| 4 | 16.9k | Resistor_SMD:R_0402_1005Metric | R504, R1302, R1402, R1502 |
| 4 | 18.2k | Resistor_SMD:R_0402_1005Metric | R901, R1001, R1101, R1201 |
| 4 | 1nF 2kV | Capacitor_SMD:C_1206_3216Metric | C1305, C1405, C1505, C1603 |
| 4 | 20.5k | Resistor_SMD:R_0402_1005Metric | R903, R1003, R1103, R1203 |
| 4 | 22 | Resistor_SMD:R_0402_1005Metric | R910, R1010, R1110, R1210 |
| 4 | 249k | Resistor_SMD:R_0402_1005Metric | R902, R1002, R1102, R1202 |
| 4 | 4.02k | Resistor_SMD:R_0402_1005Metric | R905, R1005, R1105, R1205 |
| 4 | 470uF 10V | Capacitor_SMD:CP_Elec_6.3x7.7 | C904, C1004, C1104, C1204 |
| 4 | 470uF 25V | Capacitor_SMD:CP_Elec_8x10.5 | C903, C1003, C1103, C1203 |
| 4 | B3B-EH-A | easyeda2kicad:CONN-TH_B3B-EH-A-LF-SN | CN901, CN1001, CN1101, CN1201 |
| 4 | B4B-EH-A | easyeda2kicad:CONN-TH_B4B-EH-A-LF-SN | U905, U1005, U1105, U1205 |
| 4 | PSM712-LF-T7 | easyeda2kicad:SOT-23-3_L3.0-W1.7-P0.95-LS2.9-BR | D903, D1003, D1103, D1203 |
| 4 | RETRY | Connector_PinHeader_2.54mm:PinHeader_1x02_P2.54mm_Vertical | JP901, JP1001, JP1101, JP1201 |
| 4 | SMBJ13A | easyeda2kicad:SMB_L4.4-W3.6-LS5.3-RD | D901, D1001, D1101, D1201 |
| 4 | SMBJ6.0A | easyeda2kicad:SMB_L4.4-W3.6-LS5.3-RD | D902, D1002, D1102, D1202 |
| 4 | SMF5.0A | easyeda2kicad:SOD-123FL_L2.8-W1.9-LS3.7-RD | D904, D1004, D1104, D1204 |
| 4 | SN74LVC2G241DCU | easyeda2kicad:VSSOP-8_L2.3-W2.0-P0.50-LS3.1-BR | U901, U1001, U1101, U1201 |
| 4 | SP3485EN-L/TR | easyeda2kicad:SOIC-8_L5.0-W4.0-P1.27-LS6.0-BL | U902, U1002, U1102, U1202 |
| 4 | TPS16630PWPR | easyeda2kicad:HTSSOP-20_L6.5-W4.4-P0.65-LS6.4-TL-EP2.58 | U904, U1004, U1104, U1204 |
| 4 | TPS259531DSGR | easyeda2kicad:WSON-8_L2.0-W2.0-P0.50-TL-EP | U903, U1003, U1103, U1203 |
| 3 | 4.7uF | Capacitor_SMD:C_0805_2012Metric | C605, C606, C705 |
| 3 | 82k | Resistor_SMD:R_0402_1005Metric | R301, R401, R611 |
| 3 | BLM21PG221SN1D | easyeda2kicad:L0805 | L1301, L1401, L1501 |
| 3 | HC-ST-003-01-J | easyeda2kicad:USB-3.0-A-TH_HC-ST-003-01-Z | USB_PORTA1, USB_PORTB1, USB_PORTC1 |
| 3 | TPS2553DBVR | easyeda2kicad:SOT-23-6_L2.9-W1.6-P0.95-LS2.8-BR | U1301, U1401, U1501 |
| 2 | 100pF | Capacitor_SMD:C_0603_1608Metric | C308, C409 |
| 2 | 10uF 50V | Capacitor_SMD:C_1206_3216Metric | C202, C205 |
| 2 | 2.2 | Resistor_SMD:R_0402_1005Metric | R309, R409 |
| 2 | 2.2 | easyeda2kicad:R_0603 | R312, R413 |
| 2 | 2.2uF | Capacitor_SMD:C_0603_1608Metric | C305, C405 |
| 2 | 2.2uH 3.4A | easyeda2kicad:IND-SMD_L4.0-W4.0_LQH44PN2R2MP0L | L601, L611 |
| 2 | 20k | Resistor_SMD:R_0402_1005Metric | R308, R408 |
| 2 | 22uF 25V | Capacitor_SMD:C_1210_3225Metric | C319, C320 |
| 2 | 30pF | Capacitor_SMD:C_0402_1005Metric | C701, C702 |
| 2 | 33pF | Capacitor_SMD:C_0402_1005Metric | C801, C802 |
| 2 | 4.7nF | Capacitor_SMD:C_0402_1005Metric | C403, C501 |
| 2 | 470uF 25V | easyeda2kicad:CAP-SMD_BD8.0-L8.3-W8.3-LS9.0-FD_H10.5 | C321, C322 |
| 2 | 470uF 35V | easyeda2kicad:CAP-SMD_BD10.0-L10.3-W10.3-LS11.3-FD | C203, C204 |
| 2 | 47pF | Capacitor_SMD:C_0402_1005Metric | C302, C502 |
| 2 | 6.8pF | Capacitor_SMD:C_0402_1005Metric | C601, C611 |
| 2 | 7.5k | Resistor_SMD:R_0402_1005Metric | R302, R402 |
| 2 | 90.9k | Resistor_SMD:R_0402_1005Metric | R502, R704 |
| 2 | LM5145RGYR | easyeda2kicad:VQFN-20_L4.5-W3.5-P0.50-BL-EP | U301, U401 |
| 2 | SYNCIN GND OR PGOOD | Jumper:SolderJumper-3_P1.3mm_Bridged12_Pad1.0x1.5mm | JP301, JP401 |
| 2 | TLV62569DBVR | easyeda2kicad:SOT-23-5_L3.0-W1.7-P0.95-LS2.8-BR | U601, U611 |
| 1 | +12V_SERVO | TestPoint:TestPoint_Pad_1.0x1.0mm | TP301 |
| 1 | +19V | TestPoint:TestPoint_Pad_1.0x1.0mm | TP201 |
| 1 | +1V1 | TestPoint:TestPoint_Pad_1.0x1.0mm | TP602 |
| 1 | +3V3 | TestPoint:TestPoint_Pad_1.0x1.0mm | TP601 |
| 1 | +5V_SERVO | TestPoint:TestPoint_Pad_1.0x1.0mm | TP401 |
| 1 | +5V_USB | TestPoint:TestPoint_Pad_1.0x1.0mm | TP501 |
| 1 | 1.8nF | Capacitor_SMD:C_0402_1005Metric | C404 |
| 1 | 10.2k | Resistor_SMD:R_0402_1005Metric | R506 |
| 1 | 100nF 100V | Capacitor_SMD:C_0603_1608Metric | C206 |
| 1 | 100nF 100V | Capacitor_SMD:C_0805_2012Metric | C309 |
| 1 | 10pF | Capacitor_SMD:C_0402_1005Metric | C306 |
| 1 | 11k | Resistor_SMD:R_0402_1005Metric | R404 |
| 1 | 150 | Resistor_SMD:R_0402_1005Metric | R410 |
| 1 | 150pF | Capacitor_SMD:C_0402_1005Metric | C402 |
| 1 | 15A T 2410 | easyeda2kicad:Fuse_2410_6125Metric | F201 |
| 1 | 15k | Resistor_SMD:R_0402_1005Metric | R304 |
The 341 most common of 401 parts.
Questions
How big is the Amos PCB?
It measures 160 × 80 mm and has 4 copper layers, 1.59 mm thick.
What parts does the Amos use?
401 parts, built around the SN74LVC2G241DCU, SP3485EN-L/TR, TLV62569DBVR-TP and B4B-EH-A(LF)(SN). 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 Amos KiCad files?
From the des256/pcbs repository on GitHub, at the commit this page was made from: the board is amos/amos.kicad_pcb and its schematic amos/_restore_backup_2026-10-13T09-34-54-157/amos.kicad_sch. PCBKit opens the board in the browser, with nothing to install.
Can I use the Amos design in my own project?
Its repository states no licence, so its author keeps all rights: ask des256 before reusing the design.
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