2 layers225.9 × 92.6 mm
2 layers189.2 × 126.7 mm
Ursa base
plty/ursa1ursa
- Size
- 189.2 × 126.7 mm
- Copper layers
- 2
- Thickness
- 1.6 mm
- Parts
- 80
- Nets
- 111
- Pads
- 507
- Tracks, vias
- 538, 57
- Pours
- 1
- Routed
- Yes
- KiCad
- KiCad 6 (file 20211014)
- Created
- 27 Sep 2022
- Updated
- 27 Sep 2022
Overview
Ursa base is an open-source printed circuit board by plty, from the plty/ursa repository on GitHub. It is a 2-layer board of 189.2 × 126.7 mm with 80 parts on 111 nets, routed with 538 tracks and 57 vias.
It is built around the BQ24075RGT, USBLC6-2SC6 and XC6206P332MR. Its parts include 36 switches, 15 resistors, 9 capacitors, 8 ICs and 4 connectors. It belongs with the nRF52 and nRF5x boards of this library.
Main components
3
BQ24075RGT
QFN-16-EP(3x3)-40℃~+125℃ 1.5A 4.2V 4.35V~6.4V 6.5uA Charging IC Lithium Battery Not supported Support QFN-16-EP(3x3) Battery Management ROHSTexas InstrumentsBattery Management
USBLC6-2SC6
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)
XC6206P332MR
SOT-23-40℃~+85℃@(Ta) 1 1uA 200mA 3.3V 6V Fixed Over Current Protection Positive SOT-23-3L Voltage Regulators - Linear, Low Drop Out (LDO) Regulators ROHSTorex SemiconductorVoltage Regulators - Linear, Low Drop Out (LDO) Regulators
Parts
80| Qty | Value | Footprint | References |
|---|---|---|---|
| 18 | SW_Push | switches:Choc_PG1350_Choc_Spacing | S19, S20, S21, S22, S23, S24, S25, S26, S27, S28, S29, S30, S31, S32, S33, S34 +2 |
| 17 | SW_Push | reee:Choc_PG1350_Tight | S1, S2, S3, S4, S5, S6, S7, S8, S10, S11, S12, S13, S14, S15, S17, S18 +1 |
| 6 | 4u7F | Capacitor_SMD:C_0805_2012Metric_Pad1.18x1.45mm_HandSolder | C2, C2, C3, C3, C5, C6 |
| 6 | 5K1 | Resistor_SMD:R_0805_2012Metric_Pad1.20x1.40mm_HandSolder | R1, R1, R2, R2, R9, R10 |
| 3 | 10K | Resistor_SMD:R_0805_2012Metric_Pad1.20x1.40mm_HandSolder | R5, R5, R6 |
| 3 | 10uF | Capacitor_SMD:C_0805_2012Metric_Pad1.18x1.45mm_HandSolder | C1, C1, C4 |
| 3 | 2M | Resistor_SMD:R_0805_2012Metric_Pad1.20x1.40mm_HandSolder | R4, R4, R8 |
| 3 | 802K | Resistor_SMD:R_0805_2012Metric_Pad1.20x1.40mm_HandSolder | R3, R3, R7 |
| 2 | BQ24075RGT | Package_DFN_QFN:VQFN-16-1EP_3x3mm_P0.5mm_EP1.68x1.68mm_ThermalVias | U3, U6 |
| 2 | CLK | TestPoint:TestPoint_Pad_2.0x2.0mm | TP3, TP7 |
| 2 | Conn_01x02 | Connector_JST:JST_PH_S2B-PH-K_1x02_P2.00mm_Horizontal | J2, J3 |
| 2 | GND | TestPoint:TestPoint_Pad_2.0x2.0mm | TP4, TP8 |
| 2 | IO | TestPoint:TestPoint_Pad_2.0x2.0mm | TP2, TP6 |
| 2 | RST | TestPoint:TestPoint_Pad_2.0x2.0mm | TP1, TP5 |
| 2 | USBLC6-2SC6 | Package_TO_SOT_SMD:SOT-23-6 | U5, U8 |
| 2 | USB_C_Receptacle_USB2.0 | marbastlib-various:USB_C_Receptacle_HRO_TYPE-C-31-M-14 | J1, J4 |
| 2 | XC6206P332MR | Package_TO_SOT_SMD:SOT-23 | U4, U7 |
| 2 | nRF52840_holyiot_18010 | marbastlib-various:nRF52840_holyiot_18010_HS_simple | U1, U2 |
| 1 | combo | reee:Choc_PG1350_Tight__EVQWGD001__Combo | S16 |
Questions
How big is the Ursa base PCB?
It measures 189.2 × 126.7 mm and has 2 copper layers, 1.6 mm thick.
What parts does the Ursa base use?
80 parts, built around the BQ24075RGT, USBLC6-2SC6 and XC6206P332MR. 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 Ursa base KiCad files?
From the plty/ursa repository on GitHub, at the commit this page was made from: the board is ursa-base.kicad_pcb and its schematic ursa-base.kicad_sch. PCBKit opens the board in the browser, with nothing to install.
Can I use the Ursa base design in my own project?
Its repository states no licence, so its author keeps all rights: ask plty before reusing the design.
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