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 layers84.5 × 54.6 mm
Main board v2
felixzero/escrocs7Repository for the ESCROCS team for the french robotics cup 2020!
- Size
- 84.5 × 54.6 mm
- Copper layers
- 2
- Thickness
- 1.6 mm
- Parts
- 75
- Nets
- 94
- Pads
- 334
- Tracks, vias
- 559, 83
- Pours
- 12
- Routed
- Yes
- KiCad
- KiCad 6 (file 20211014)
- Created
- 27 Oct 2019
- Updated
- 28 May 2025
Overview
Main board v2 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 84.5 × 54.6 mm with 75 parts on 94 nets, routed with 559 tracks and 83 vias.
It is built around the ESP32-WROOM-32, MAX485ED and RS485, with the LM2576S-5.0, SRV05-4 and PCA9306DC1 among its other parts. Its parts include 22 resistors, 13 capacitors, 11 ICs, 11 connectors and 8 diodes. It belongs with the robots and motor control boards and the ESP32 boards of this library.
Main components
10
ESP32-WROOM-32
SMD,18x25.5mm-40℃~+85℃ -98dBm 2.4GHz 2.7V~3.6V 20dBm Bluetooth4.2 ESP32-DOWDQ6 UART、SDIO、SPI、I2C、GPIO、PWM、ADC、DAC SMD,25.5x18mm WiFi Modules ROHSEspressif SystemsWiFi Modules
MAX485ED
SOP-8-40℃~+85℃ 1 1 1mA 32 4.75V~5.25V 5Mbps Half-Duplex Transceiver ±8kV SOP-8 RS-485 / RS-422 ICs ROHSHTCRS-485 / RS-422 ICsRS485
SOP-81 1 1.2mA 2.5Mbps 256 5V Half-Duplex Transceiver ±4kV SOP-8 RS-485 / RS-422 ICs ROHSGRRS-485 / RS-422 ICs
LM2576S-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
SRV05-4
SOT-23-6L-55℃~+150℃ 15V 1pF 4A 5V 5uA 6V 80W ESD Four channels IEC 61000-4-2、IEC 61000-4-5 Unidirectional SOT-23-6L ESD and Surge Protection (TVS/ESD) ROHShongjiachengESD And Surge Protection (TVS/ESD)
PCA9306DC1
VSSOP-8-0.5mm-40℃~+105℃ 1.8V~5.5V 1V~3.6V 2 2 2Mbps Automatic direction detection、Output enable high-impedance Bidirectional Level translator Open-drain SMBus、I2C VSSOP-8-0.5mm Translators, Level Shifters ROHSNXP SemiconductorsTranslators, Level Shifters
AMS1117-3.3
SOT-223-40℃~+125℃ 0.003%Vout 1 1.1V@(800mA) 15V 1A 3.3V 5mA 72dB@(120Hz) Fixed Over Current Protection、Short Circuit Protection、Thermal shutdown Positive SOT-223 Voltage Regulators - Linear, Low Drop Out (LDO) Regulators ROHSAdvanced Monolithic SystemsVoltage Regulators - Linear, Low Drop Out (LDO) Regulators
SMF30A
SOD-123FL-55℃~+150℃ 1 1uA 200W@10/1000us 30V 36.8V 4.1A 48.4V TVS Unidirectional SOD-123FL ESD and Surge Protection (TVS/ESD) ROHSTWGMCESD And Surge Protection (TVS/ESD)
SS54
SMA(DO-214AC)-55℃~+125℃ 1mA@40V 40V 550mV@5A 5A Independent SMA(DO-214AC) Schottky Diodes ROHSMDDSchottky Diodes
PSM712
SOT-23-55℃~+125℃ 10V、26V 12A 1uA 2 400W 45pF、75pF 7.5V、13.3V 7V、12V Bidirectional ESD IEC 61000-4-2、IEC 61000-4-5、IEC 61000-4-4 SOT-23 ESD and Surge Protection (TVS/ESD) ROHSDOWOESD And Surge Protection (TVS/ESD)
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
75| Qty | Value | Footprint | References |
|---|---|---|---|
| 8 | 100n | Capacitor_SMD:C_0805_2012Metric | C2, C4, C12, C13, C14, C203, C206, C301 |
| 7 | 10k | Resistor_SMD:R_0603_1608Metric | R11, R12, R13, R303, R304, R305, R306 |
| 4 | 100u | Capacitor_SMD:CP_Elec_8x10 | C1, C201, C202, C205 |
| 4 | 300 | Resistor_SMD:R_1206_3216Metric | R1, R4, R201, R202 |
| 3 | 620 | Resistor_SMD:R_0603_1608Metric | R9, R10, R14 |
| 3 | SRV05-4 | Package_TO_SOT_SMD:SOT-23-6 | U9, U11, U301 |
| 2 | 100 | Resistor_SMD:R_0603_1608Metric | R307, R308 |
| 2 | 1k | Resistor_SMD:R_0603_1608Metric | R2, R3 |
| 2 | 33k | Resistor_SMD:R_0603_1608Metric | R5, R6 |
| 2 | I2C Motor | Connector_Molex:Molex_KK-254_AE-6410-04A_1x04_P2.54mm_Vertical | J9, J10 |
| 2 | I2C Peripheral | Connector_Molex:Molex_KK-254_AE-6410-04A_1x04_P2.54mm_Vertical | J7, J8 |
| 2 | PCA9306DC1 | Package_SO:VSSOP-8_2.3x2mm_P0.5mm | U4, U5 |
| 2 | Q_NPN_BEC | Package_TO_SOT_SMD:SOT-23 | Q301, Q302 |
| 2 | RS485 | Connector_Molex:Molex_KK-254_AE-6410-04A_1x04_P2.54mm_Vertical | J13, J14 |
| 2 | SMF30A | Diode_SMD:D_SMF | D202, D206 |
| 2 | SS54 | Diode_SMD:D_SMA | D201, D203 |
| 1 | 100u | Inductor_SMD:L_12x12mm_H6mm | L201 |
| 1 | 10u | Inductor_SMD:L_12x12mm_H6mm | L1 |
| 1 | 2000u | Capacitor_SMD:CP_Elec_10x10.5 | C204 |
| 1 | 36k | Resistor_SMD:R_0603_1608Metric | R302 |
| 1 | 3V3 power | LED_SMD:LED_0603_1608Metric | D205 |
| 1 | 5V power | LED_SMD:LED_0603_1608Metric | D204 |
| 1 | 82k | Resistor_SMD:R_0603_1608Metric | R301 |
| 1 | AMS1117-3.3 | Package_TO_SOT_SMD:SOT-223-3_TabPin2 | U202 |
| 1 | BOOT | Button_Switch_SMD:SW_Push_1P1T_NO_6x6mm_H9.5mm | SW301 |
| 1 | Battery in | Connector_BarrelJack:BarrelJack_Horizontal | J1 |
| 1 | CP2102N-Axx-xQFN28 | Package_DFN_QFN:QFN-28-1EP_5x5mm_P0.5mm_EP3.35x3.35mm | U302 |
| 1 | ESP32-WROOM-32 | RF_Module:ESP32-WROOM-32U | U3 |
| 1 | FerriteBead | Inductor_SMD:L_0805_2012Metric | FB201 |
| 1 | Input encoder | Rotary_Encoder:RotaryEncoder_Alps_EC11E-Switch_Vertical_H20mm | SW3 |
| 1 | LCD contrast | Potentiometer_SMD:Potentiometer_Bourns_3314J_Vertical | RV1 |
| 1 | LCD-016N002L | Display:WC1602A | U7 |
| 1 | LM2576S-5 | Package_TO_SOT_SMD:TO-263-5_TabPin3 | U201 |
| 1 | MAX485E | Package_SO:SOIC-8_3.9x4.9mm_P1.27mm | U8 |
| 1 | PSM712 | Package_TO_SOT_SMD:SOT-23 | D8 |
| 1 | Polyfuse | Fuse:Fuse_1812_4532Metric | F201 |
| 1 | RESET | Button_Switch_SMD:SW_Push_1P1T_NO_6x6mm_H9.5mm | SW302 |
| 1 | Side select | Connector_Molex:Molex_KK-254_AE-6410-02A_1x02_P2.54mm_Vertical | J4 |
| 1 | Status | LED_SMD:LED_0603_1608Metric | D4 |
| 1 | Trigger | Connector_Molex:Molex_KK-254_AE-6410-02A_1x02_P2.54mm_Vertical | J3 |
| 1 | UART PGM | Connector_Molex:Molex_KK-254_AE-6410-04A_1x04_P2.54mm_Vertical | J2 |
| 1 | USB_B | Connector_USB:USB_B_TE_5787834_Vertical | J301 |
Questions
How big is the Main board v2 PCB?
It measures 84.5 × 54.6 mm and has 2 copper layers, 1.6 mm thick.
What parts does the Main board v2 use?
75 parts, built around the ESP32-WROOM-32, MAX485ED, RS485 and LM2576S-5.0. 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 Main board v2 KiCad files?
From the felixzero/escrocs repository on GitHub, at the commit this page was made from: the board is CAD/electrical/main_board_v2/main_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 Main board v2 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).
More from felixzero/escrocs
4- 4 layers62 × 34 mm
Motor board v3
felixzero/escrocs
Repository for the ESCROCS team for the french robotics cup 2020!
75 parts7GPL-3.0 - 2 layers123.2 × 55.2 mm
Accessory board
felixzero/escrocs
Repository for the ESCROCS team for the french robotics cup 2020!
61 parts7GPL-3.0 - 2 layers
Ultrasonic board
felixzero/escrocs
Repository for the ESCROCS team for the french robotics cup 2020!
26 parts7GPL-3.0
Similar boards
- 2 layers90 × 48.9 mm
- 2 layers61.3 × 45.2 mm
HashHacker Hashboard Tester
DCentralTech/HashHacker-Multi-Hashboard-Tester
HashHacker Multi-Hashboard Tester from D-Central, the ultimate open-source tool for repairing and testing your ASIC miners.
30 parts9GPL-3.0 - 2 layers175 × 60 mm
- 2 layers71.9 × 50 mm
- 2 layers40.2 × 35.8 mm
SensactDoorControl
klaus-liebler/sensact
Es gibt vier Namespaces für Nachrichten "REQUEST" und "RESPONSE", "EVENT" und "ACKNOWLEDGE". Dies wird mit den beiden LSB des Versions-Namespace-Bytes erklärt (Somit bleiben 64 Versionierungsmöglichkeiten) Alle vier…
57 parts4Apache-2.0 - 2 layers38 × 42 mm
Manipulator attachment
borzeman/PzbElectronics
Репозиторий для поддержки версионирования при разработке плат для киоска.
96 parts - 4 layers92 × 60 mm
- 4 layers106 × 63.5 mm
