2 layers58.4 × 41.7 mm
Stepper board
felixzero/escrocs
Repository for the ESCROCS team for the french robotics cup 2020!
81 parts7GPL-3.0
2 layers123.2 × 55.2 mm
Accessory board
felixzero/escrocs7Repository for the ESCROCS team for the french robotics cup 2020!
- Size
- 123.2 × 55.2 mm
- Copper layers
- 2
- Thickness
- 1.6 mm
- Parts
- 61
- Nets
- 76
- Pads
- 259
- Tracks, vias
- 529, 24
- Pours
- 1
- Routed
- Yes
- KiCad
- KiCad 5 (file 20171130)
- Created
- 27 Oct 2019
- Updated
- 28 May 2025
Overview
Accessory board is an open-source printed circuit board by felixzero, from the felixzero/escrocs repository on GitHub, published under the GPL-3.0 licence. It is a 2-layer board of 123.2 × 55.2 mm with 61 parts on 76 nets, routed with 529 tracks and 24 vias.
It is built around the LM2576HVS-5, PCA9685PW and ULN2003, with the PCA9536D and SS54 among its other parts. Its parts include 29 connectors, 8 capacitors, 8 ICs, 5 resistors and 4 diodes. It belongs with the robots and motor control boards of this library.
Main components
5
LM2576HVS-5
TO-263-5-40℃~+125℃ 1 4V~60V 52kHz Buck Buck TO-263-5 DC-DC Converters ROHSTexas InstrumentsDC-DC Converters
PCA9685PW
TSSOP-28-40℃~+85℃ 100kHz~1MHz 16 2.3V~5.5V 25mA 5.5V Built-in PWM TSSOP-28 LED Drivers ROHSNXP SemiconductorsLED Drivers
ULN2003
SOP-161.1V@250uA,100mA 25pF 2V 30V 500mA 50uA 50uA Seven channels SOP-16 Darlington Transistor Arrays ROHSBLDarlington Transistor Arrays
PCA9536D
SOIC-8-40℃~+85℃ 1 2.3V~5.5V 24mA 250nA 4 4.1V 400kHz I2C、SMBus No Interrupt Output Reset function SO-8 I/O Expanders ROHSNXP SemiconductorsI/O Expanders
SS54
SMA(DO-214AC)-55℃~+125℃ 1mA@40V 40V 550mV@5A 5A Independent SMA(DO-214AC) Schottky Diodes ROHSMDDSchottky Diodes
README
CAD/electrical/stepper_board/README.mdStepper board
A board, based on an ATMega168PA, meant to control up to 3 1.5A bipolar steppers (the most common kind, used in 3D printers for instance). It can also control up to 3 12V pumps.
Its code is in the code/stepper_board folder.
Known issues
The steppers stay actively driven all the time. Over prolonged use of time, the card can get really hot, we recommend to use heatsinks on the stepper drivers.
A workaround to permit the microcontroller to switch off the drivers is the set the fuse in such a way that the RESET pin is a regular I/O of the ATMega and let the ATMega hold RESET down when the steppers are not in use. Beware: doing so will prevent reflashing the board.
Parts
61| Qty | Value | Footprint | References |
|---|---|---|---|
| 5 | 100n | Capacitor_SMD:C_1206_3216Metric_Pad1.33x1.80mm_HandSolder | C1, C3, C6, C7, C8 |
| 3 | 10u | Capacitor_THT:CP_Radial_D5.0mm_P2.00mm | C2, C4, C5 |
| 3 | ULN2003 | Package_SO:SO-16_3.9x9.9mm_P1.27mm | U4, U5, U8 |
| 2 | 100k | Resistor_SMD:R_1206_3216Metric_Pad1.30x1.75mm_HandSolder | R3, R4 |
| 2 | 300 | Resistor_SMD:R_1206_3216Metric_Pad1.30x1.75mm_HandSolder | R1, R2 |
| 2 | I2C | Connector_Molex:Molex_KK-254_AE-6410-04A_1x04_P2.54mm_Vertical | J2, J3 |
| 2 | PCA9629 | Package_SO:TSSOP-16_4.4x5mm_P0.65mm | U1, U2 |
| 2 | Voltage select | Connector_PinHeader_2.54mm:PinHeader_1x03_P2.54mm_Vertical | JP1, JP2 |
| 1 | 100u | Inductor_THT:L_Radial_D24.4mm_P23.70mm_muRATA_1400series | L1 |
| 1 | 12V | LED_THT:LED_D3.0mm | D4 |
| 1 | 1k | Resistor_SMD:R_1206_3216Metric_Pad1.30x1.75mm_HandSolder | R5 |
| 1 | Battery in | Connector_BarrelJack:BarrelJack_Horizontal | J1 |
| 1 | End switch 1A | Connector_Molex:Molex_KK-254_AE-6410-02A_1x02_P2.54mm_Vertical | J8 |
| 1 | End switch 1B | Connector_Molex:Molex_KK-254_AE-6410-02A_1x02_P2.54mm_Vertical | J9 |
| 1 | End switch 2A | Connector_Molex:Molex_KK-254_AE-6410-02A_1x02_P2.54mm_Vertical | J6 |
| 1 | End switch 2B | Connector_Molex:Molex_KK-254_AE-6410-02A_1x02_P2.54mm_Vertical | J7 |
| 1 | LM2576HVS-5 | Package_TO_SOT_SMD:TO-263-5_TabPin3 | U3 |
| 1 | Logic | LED_THT:LED_D3.0mm | D1 |
| 1 | PCA9536D | Package_SO:SOIC-8_3.9x4.9mm_P1.27mm | U7 |
| 1 | PCA9685PW | Package_SO:TSSOP-28_4.4x9.7mm_P0.65mm | U6 |
| 1 | Pump A | Connector_Molex:Molex_KK-254_AE-6410-02A_1x02_P2.54mm_Vertical | J22 |
| 1 | Pump B | Connector_Molex:Molex_KK-254_AE-6410-02A_1x02_P2.54mm_Vertical | J23 |
| 1 | Pump C | Connector_Molex:Molex_KK-254_AE-6410-02A_1x02_P2.54mm_Vertical | J24 |
| 1 | Pump D | Connector_Molex:Molex_KK-254_AE-6410-02A_1x02_P2.54mm_Vertical | J25 |
| 1 | Pwr | LED_THT:LED_D3.0mm | D3 |
| 1 | SS54 | Diode_SMD:D_SMB_Handsoldering | D2 |
| 1 | Servo 0 | Connector_Molex:Molex_KK-254_AE-6410-03A_1x03_P2.54mm_Vertical | J10 |
| 1 | Servo 1 | Connector_Molex:Molex_KK-254_AE-6410-03A_1x03_P2.54mm_Vertical | J11 |
| 1 | Servo 2 | Connector_Molex:Molex_KK-254_AE-6410-03A_1x03_P2.54mm_Vertical | J12 |
| 1 | Servo 3 | Connector_Molex:Molex_KK-254_AE-6410-03A_1x03_P2.54mm_Vertical | J13 |
| 1 | Servo 4 | Connector_Molex:Molex_KK-254_AE-6410-03A_1x03_P2.54mm_Vertical | J14 |
| 1 | Servo 5 | Connector_Molex:Molex_KK-254_AE-6410-03A_1x03_P2.54mm_Vertical | J15 |
| 1 | Servo 6 | Connector_Molex:Molex_KK-254_AE-6410-03A_1x03_P2.54mm_Vertical | J16 |
| 1 | Servo 7 | Connector_Molex:Molex_KK-254_AE-6410-03A_1x03_P2.54mm_Vertical | J17 |
| 1 | Servo 8 | Connector_Molex:Molex_KK-254_AE-6410-03A_1x03_P2.54mm_Vertical | J20 |
| 1 | Servo 9 | Connector_Molex:Molex_KK-254_AE-6410-03A_1x03_P2.54mm_Vertical | J21 |
| 1 | Servo A | Connector_Molex:Molex_KK-254_AE-6410-03A_1x03_P2.54mm_Vertical | J18 |
| 1 | Servo B | Connector_Molex:Molex_KK-254_AE-6410-03A_1x03_P2.54mm_Vertical | J19 |
| 1 | Servo C | Connector_Molex:Molex_KK-254_AE-6410-03A_1x03_P2.54mm_Vertical | J28 |
| 1 | Servo D | Connector_Molex:Molex_KK-254_AE-6410-03A_1x03_P2.54mm_Vertical | J29 |
| 1 | Servo E | Connector_Molex:Molex_KK-254_AE-6410-03A_1x03_P2.54mm_Vertical | J26 |
| 1 | Servo F | Connector_Molex:Molex_KK-254_AE-6410-03A_1x03_P2.54mm_Vertical | J27 |
| 1 | Stepper 1 | Connector_Molex:Molex_KK-254_AE-6410-06A_1x06_P2.54mm_Vertical | J5 |
| 1 | Stepper 2 | Connector_Molex:Molex_KK-254_AE-6410-06A_1x06_P2.54mm_Vertical | J4 |
The 57 most common of 61 parts.
Questions
How big is the Accessory board PCB?
It measures 123.2 × 55.2 mm and has 2 copper layers, 1.6 mm thick.
What parts does the Accessory board use?
61 parts, built around the LM2576HVS-5, PCA9685PW, ULN2003 and PCA9536D. 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 Accessory board KiCad files?
From the felixzero/escrocs repository on GitHub, at the commit this page was made from: the board is CAD/electrical/accessory_board/accessory_board.kicad_pcb and its schematic CAD/electrical/accessory_board/accessory_board.kicad_sch. PCBKit opens the board in the browser, with nothing to install.
Can I use the Accessory board design in my own project?
Its repository publishes it under the GPL-3.0 licence: you may reuse it on that licence's terms (keep the author's notice, and for a copyleft licence share your changes alike).
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