4 layers70 × 95 mm
4 layers
Pwr v3
LiU-SeeGoals/ElectronicsSchematics etc.
- Copper layers
- 4
- Thickness
- 1.6 mm
- Parts
- 74
- Nets
- 165
- Pads
- 349
- Tracks, vias
- 450, 269
- Pours
- 8
- Routed
- Yes
- KiCad
- KiCad 10.0 (file 20260206)
- Created
- 8 Dec 2023
- Updated
- 2 Nov 2026
Overview
Pwr v3 is an open-source printed circuit board by LiU-SeeGoals, from the LiU-SeeGoals/Electronics repository on GitHub. It is a 4-layer board with 74 parts on 165 nets, routed with 450 tracks and 269 vias.
It is built around the LM2576S-12, LM2576S-3.3 and LM2576S-5.0, with the BSS84 and BUK9832-55A-VB among its other parts. Its parts include 10 capacitors, 8 diodes, 7 resistors, 4 ICs and 4 connectors.
Main components
5
LM2576S-12
TO-263-5-40℃~+125℃@(TJ) 1 10mA 12V 3A 4V~40V 52kHz Buck Buck Built-in Fixed No TO-263-5 DC-DC Converters ROHSTexas InstrumentsDC-DC ConvertersLM2576S-3.3
TO-263-5LTO-263-5L DC-DC Converters ROHSTDSEMICDC-DC ConvertersLM2576S-5.0
TO-263-5-40℃~+125℃@(TJ) 1 3A 4V~40V 52kHz 5V 5mA Buck Built-in Fixed No Step-down type TO-263-5 DC-DC Converters ROHSSlkorDC-DC Converters
BSS84
SOT-23-55℃~+150℃ 1 P-Channel 130mA 2.8pF 24.6pF 2V 3.2Ω@5V 300mW 4.7pF 50V 590pC@10V SOT-23 MOSFETs ROHSDiodes IncorporatedMOSFETs
BUK9832-55A-VB
SOT-223MOSFETsVBsemi Elec
README
README.mdElectronics
Schematics etc.
Motor driver
The motor driver has 5 important pins,
Motor driver has 5 pins to the devboard, 2 power pins and 8 pins to the motor
The important pins are
PWM, - Takes PWM signal to decide speed of motor, generate from devboard with timers.
FGOUT, - Hall sensor tick output, work like a wheel encoder and ticking as the motor spins so that we know how much the motor has spun.
nFault, - Gives fault messages when fault states are entered by going low. Currently does not work, set this pin HIGH 5v or motor driver can enter test mode.
brake - HIGH sets all motor coils high breaking the motor hard.
dir - Decides direction for motorMotor driver improvements
Capacitors and components change capacitance, inductance, etc as the voltage changes. This was not know during the making of driver.
Capacitors should be closer to the pins they are filtering.
There is a risk of overheating if the motors get stuck for a longer time, adding some cooling would be nice.
Getting started
Add the .pretty library file to get footprints from lib/
Using kicad: preferences -> Manage footprint libraries
Parts
74| Qty | Value | Footprint | References |
|---|---|---|---|
| 10 | MH_11, MH_21, MH_22, MH_31, MH_41, MH_42, MH1, MH2, MH3, MH4 | ||
| 8 | 100 | Resistor_SMD:R_0402_1005Metric | RK1, RK5, RK6, RK7, RK8, RK11, RK12, RK13 |
| 4 | Conn_02x03_Counter_Clockwise | Connector_PinSocket_2.54mm:PinSocket_2x03_P2.54mm_Vertical | M1, M2, M3, M4 |
| 3 | 100uF | Capacitor_SMD:CP_Elec_8x10 | C1_1, C1_2, C1_3 |
| 3 | 1N5821 | Diode_THT:D_DO-201AD_P15.24mm_Horizontal | D1, D2, D3 |
| 3 | Conn_01x02 | Connector_PinHeader_2.54mm:PinHeader_1x02_P2.54mm_Vertical | BUZZER1, DRIBBLER1, IR_1 |
| 2 | 1000uF | Capacitor_SMD:CP_Elec_10x10.5 | C2_2, C2_3 |
| 2 | 100nF | Capacitor_SMD:C_0402_1005Metric | C1_I1, C2_I1 |
| 2 | 100uH | Inductor_SMD:L_Sunlord_MWSA1206S-101 | L1, L3 |
| 2 | 10k | Resistor_SMD:R_0402_1005Metric | RK9, RK10 |
| 2 | 16.2 | Resistor_SMD:R_0603_1608Metric | R4, R6 |
| 2 | 1k | Resistor_SMD:R_0603_1608Metric | R1_I1, R2_I1 |
| 2 | BLUE LED | LED_SMD:LED_0603_1608Metric | LED2, LED4 |
| 2 | Conn_01x03 | Connector_Hirose:Hirose_DF13-03P-1.25DSA_1x03_P1.25mm_Vertical | IR1, IR2 |
| 2 | Conn_02x36_Odd_Even | Connector_PinHeader_2.54mm:PinHeader_2x36_P2.54mm_Vertical | CN11, CN12 |
| 2 | LOGO | LOGO | G***, G*** |
| 1 | 100 | Resistor_SMD:R_1206_3216Metric | R7 |
| 1 | 1000uF | Capacitor_SMD:CP_Elec_8x10.5 | C2_1 |
| 1 | 10uF | Capacitor_SMD:C_1206_3216Metric | C2_R1 |
| 1 | 15.4 | Resistor_SMD:R_0603_1608Metric | R5 |
| 1 | 150uH | Inductor_SMD:L_TaiTech_TMPC1265_13.5x12.5mm | L2 |
| 1 | 530470610 | 530470610_6p:530470610 | J5 |
| 1 | 62 | Resistor_SMD:R_0603_1608Metric | R3 |
| 1 | 8.2p | Capacitor_SMD:C_1206_3216Metric | C1_R1 |
| 1 | BSS84 | Package_TO_SOT_SMD:SOT-23 | Q2 |
| 1 | BUK9832-55A | Package_TO_SOT_THT:TO-220-3_Vertical | Q1 |
| 1 | Buzzer | Buzzer_9mm_P5_D1p95:Buzzer_9mm_P5_D1p95 | BZ1 |
| 1 | Conn_01x12 | 530471210_12p:530471210 | J1 |
| 1 | Conn_02x04_Counter_Clockwise | Connector_PinSocket_2.54mm:PinSocket_2x04_P2.54mm_Vertical | J_RF1 |
| 1 | D | Diode_THT:D_DO-201AD_P15.24mm_Horizontal | D4 |
| 1 | LM2576S-12 | Package_TO_SOT_SMD:TO-263-5_TabPin3 | U2 |
| 1 | LM2576S-3.3 | Package_TO_SOT_SMD:TO-263-5_TabPin3 | U3 |
| 1 | LM2576S-5 | Package_TO_SOT_SMD:TO-263-5_TabPin3 | U1 |
| 1 | LSM6DSLTR | lsm6dsltr:LGA-14_3x2.5mm_P0.5mm_LayoutBorder3x4y | U4 |
| 1 | RED LED | LED_SMD:LED_0603_1608Metric | LED1 |
| 1 | SW_SPST | Switch_471005264152:WS-RSTV_27.6 x13.8_RockerSwitch | SW1 |
| 1 | WHITE LED | LED_SMD:LED_0603_1608Metric | LED3 |
| 1 | XT60 | Connector_AMASS:AMASS_XT60-M_1x02_P7.20mm_Vertical | BAT1 |
The 73 most common of 74 parts.
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Questions
What parts does the Pwr v3 use?
74 parts, built around the LM2576S-12, LM2576S-3.3, LM2576S-5.0 and BSS84. 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 Pwr v3 KiCad files?
From the LiU-SeeGoals/Electronics repository on GitHub, at the commit this page was made from: the board is pwr_v3/pwr_v3.kicad_pcb and its schematic devboard_v1/devboard_v1.kicad_sch. PCBKit opens the board in the browser, with nothing to install.
Can I use the Pwr v3 design in my own project?
Its repository states no licence, so its author keeps all rights: ask LiU-SeeGoals before reusing the design.