2 layers71.1 × 22.9 mm
2 layers
PCB design
andre-fajar-n/Motor-Speed-ControllerSkill test for position Electrical Embedded Engineer in eFishery
- Copper layers
- 2
- Thickness
- 1.6 mm
- Parts
- 46
- Nets
- 52
- Pads
- 175
- Tracks, vias
- 421, 20
- Routed
- Yes
- KiCad
- KiCad 5 (file 20171130)
- Created
- 30 Sep 2020
- Updated
- 30 Sep 2020
Overview
PCB design is an open-source printed circuit board by andre-fajar-n, from the andre-fajar-n/Motor-Speed-Controller repository on GitHub. It is a 2-layer board with 46 parts on 52 nets, routed with 421 tracks and 20 vias.
It is built around the ATMEGA328-PU, ESP-WROOM-02 and BSS138, with the TIP122 among its other parts. Its parts include 14 resistors, 8 capacitors, 8 switches, 6 connectors and 4 ICs. It belongs with the interfaces and adapters boards and the AVR (ATmega, ATtiny) boards of this library.
Main components
4
ATMEGA328-PU
PDIP-28-40℃~+85℃ 1.8V~5.5V 10bit 1KB 20MHz 23 2KB 32KB 8 Bit AVR Built-in FLASH PDIP-28 Microcontrollers (MCU/MPU/SOC) ROHSMicrochip TechnologyMicrocontrollers (MCU/MPU/SOC)
ESP-WROOM-02
SMD-18P-40℃~+85℃ -98dBm 170mA 2.4GHz 2.7V~3.6V 20dBm 50mA、56mA ESP8266EX On-board PCB Antenna UART、SPI、I2C、GPIO、PWM、I2S SMD-18P WiFi Modules ROHSEspressif SystemsWiFi Modules
BSS138
SOT-23-55℃~+150℃ 1 N-channel 1.1Ω@10V、1.2Ω@4.5V 1.2V 1.7nC@10V 17.5pF 340mA 350mW 50V 6.5pF N-Channel SOT-23 MOSFETs ROHShongjiachengMOSFETs
TIP122
TO-2201000 100V 2.5V 200uA 5A 5V 65W NPN TO-220 Darlington Transistors ROHSSTMicroelectronicsDarlington Transistors
README
README.mdmotor-speed-controller
This is my answer for job test for Electrical Embedded Engineer position from a company. The task is to make motor speed controller used ATMega 328, and trasnfer the data to ESP wroom 02 to save in microSD card and web server
Schematic Design
Or you can see the PDF in folder Schematic
PCB Design
Design for all layer
Design for top layer
Design for bottom layer
Firmware
For firmware, I used Arduino programming to both of the microcontroller
Parts
46| Qty | Value | Footprint | References |
|---|---|---|---|
| 12 | 10k | Resistor_SMD:R_0805_2012Metric | R1, R2, R4, R5, R6, R7, R8, R9, R11, R12, R13, R14 |
| 2 | 0.33uF | Capacitor_SMD:CP_Elec_4x4.5 | C5, C7 |
| 2 | 100nF | Capacitor_SMD:C_1210_3225Metric | C4, C6 |
| 2 | 22pF | Capacitor_SMD:C_1210_3225Metric | C1, C2 |
| 2 | 470 | Resistor_SMD:R_0805_2012Metric | R3, R10 |
| 2 | BSS138 | Package_TO_SOT_SMD:SOT-23 | Q1, Q2 |
| 2 | LED | LED_SMD:LED_0805_2012Metric | D1, D2 |
| 1 | +10 | Button_Switch_SMD:SW_Push_1P1T_NO_6x6mm_H9.5mm | SW6 |
| 1 | +5 | Button_Switch_SMD:SW_Push_1P1T_NO_6x6mm_H9.5mm | SW4 |
| 1 | -10 | Button_Switch_SMD:SW_Push_1P1T_NO_6x6mm_H9.5mm | SW7 |
| 1 | -5 | Button_Switch_SMD:SW_Push_1P1T_NO_6x6mm_H9.5mm | SW5 |
| 1 | 100uF | Capacitor_SMD:CP_Elec_4x4.5 | C3 |
| 1 | 10uF | Capacitor_SMD:CP_Elec_4x4.5 | C8 |
| 1 | 12V | Connector_PinSocket_2.00mm:PinSocket_1x02_P2.00mm_Vertical | J1 |
| 1 | 5V | Connector_PinSocket_2.00mm:PinSocket_1x02_P2.00mm_Vertical | J2 |
| 1 | ATmega328-PU | Package_DIP:DIP-28_W7.62mm | U4 |
| 1 | Crystal | Crystal:Crystal_HC52-6mm_Vertical | Y1 |
| 1 | ESP-WROOM-02 | RF_Module:ESP-WROOM-02 | U2 |
| 1 | FLASH | Button_Switch_SMD:SW_Push_1P1T_NO_6x6mm_H9.5mm | SW2 |
| 1 | Flash ESP | Connector_PinHeader_2.00mm:PinHeader_1x02_P2.00mm_Vertical | J6 |
| 1 | Flash atmega | Connector_PinSocket_2.00mm:PinSocket_2x03_P2.00mm_Vertical | J3 |
| 1 | L78L05_TO92 | Package_TO_SOT_THT:TO-92_Inline | U3 |
| 1 | LD1117S33TR_SOT223 | Package_TO_SOT_SMD:SOT-223-3_TabPin2 | U1 |
| 1 | Micro_SD_Card | Connector_Card:microSD_HC_Hirose_DM3AT-SF-PEJM5 | J4 |
| 1 | Motor | Connector_PinHeader_2.00mm:PinHeader_1x02_P2.00mm_Vertical | J5 |
| 1 | RESET ATMEGA | Button_Switch_SMD:SW_Push_1P1T_NO_6x6mm_H9.5mm | SW1 |
| 1 | RESET_ESP | Button_Switch_SMD:SW_Push_1P1T_NO_6x6mm_H9.5mm | SW3 |
| 1 | TIP122 | Package_TO_SOT_THT:TO-220-3_Vertical | Q3 |
| 1 | control_UART_ESP | Button_Switch_THT:SW_CuK_JS202011CQN_DPDT_Straight | SW8 |
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Questions
What parts does the PCB design use?
46 parts, built around the ATMEGA328-PU, ESP-WROOM-02, BSS138 and TIP122. 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 PCB design KiCad files?
From the andre-fajar-n/Motor-Speed-Controller repository on GitHub, at the commit this page was made from: the board is PCB/PCB design.kicad_pcb. PCBKit opens the board in the browser, with nothing to install.
Can I use the PCB design design in my own project?
Its repository states no licence, so its author keeps all rights: ask andre-fajar-n before reusing the design.