2 layers101 × 84 mm
2 layers102 × 40 mm
First pcb
Roguillo/projects- Size
- 102 × 40 mm
- Copper layers
- 2
- Thickness
- 1.6 mm
- Parts
- 50
- Nets
- 74
- Pads
- 205
- Tracks, vias
- 553, 168
- Pours
- 1
- Routed
- Yes
- KiCad
- KiCad 8.0 (file 20240108)
- Created
- 28 Dec 2024
- Updated
- 16 Dec 2025
Overview
First pcb is an open-source printed circuit board by Roguillo, from the Roguillo/projects repository on GitHub, published under the MIT licence. It is a 2-layer board of 102 × 40 mm with 50 parts on 74 nets, routed with 553 tracks and 168 vias.
It is built around the ATMEGA32U4-AU, DHT11 and SK6812MINI-E, with the T2N7002AK,LM and LDT-N2804RI among its other parts. Its parts include 17 diodes, 15 resistors, 6 capacitors, 3 transistors and 3 connectors. It belongs with the AVR (ATmega, ATtiny) boards of this library.
Main components
5
ATMEGA32U4-AU
QFP-44(10x10)-40℃~+85℃ 10bit 16MHz 1KB 2.5KB 2.7V~5.5V 26 32KB 8 Bit AVR Built-in FLASH QFP-44(10x10) Microcontrollers (MCU/MPU/SOC) ROHSMicrochip TechnologyMicrocontrollers (MCU/MPU/SOC)
DHT11
SIP-4-20℃~+60℃ 1mA 3.3V~5.5V 5%RH~95%RH ±2℃ ±5%RH SIP-4 Temperature and Humidity Sensor ROHSAosong ElecTemperature And Humidity Sensor
SK6812MINI-E
SMD-40℃~+85℃ 0.6mA 1.78mm 120mcd~240mcd 120° 160mcd~320mcd 1kHz 2.8mm 2000V 3.2mm 3.7V~5.5V 460nm~470nm 515nm~525nm 620nm~625nm 800Kbit/s 815mcd~1275mcd Semi-transparent lens SMD RGB LEDs(Built-in IC) ROHSOPSCO OptoelectronicsRGB LEDs(Built-In IC)
T2N7002AK,LM
SOT-231 N-channel 17pF 2.1V 200mA 3.9Ω@10V 320mW 350pC@4.5V 60V SOT-23 MOSFETs ROHSToshibaMOSFETs
LDT-N2804RI
DIP-110.28 105mW 1mmx22.53mmx6.1mm 3 7 Segment Common Cathode Red DIP-11 LED Segment Displays ROHSLumexLED Segment Displays
README
README.mdFor personal and academic projects
Parts
50| Qty | Value | Footprint | References |
|---|---|---|---|
| 14 | SK6812MINI | LED_SMD:LED_SK6812MINI_PLCC4_3.5x3.5mm_P1.75mm | D3, D4, D5, D6, D7, D8, D9, D10, D11, D12, D13, D14, D15, D16 |
| 8 | 150 | Resistor_SMD:R_0805_2012Metric_Pad1.20x1.40mm_HandSolder | R8, R9, R10, R11, R12, R13, R14, R15 |
| 3 | T2N7002AK | Package_TO_SOT_SMD:SOT-23 | Q1, Q2, Q3 |
| 2 | 100 | Resistor_SMD:R_0805_2012Metric_Pad1.20x1.40mm_HandSolder | R1, R2 |
| 2 | 1uF | Capacitor_SMD:C_0805_2012Metric_Pad1.18x1.45mm_HandSolder | C2, C6 |
| 2 | 22 | Resistor_SMD:R_0805_2012Metric_Pad1.20x1.40mm_HandSolder | R3, R4 |
| 2 | 22pF | Capacitor_SMD:C_0805_2012Metric_Pad1.18x1.45mm_HandSolder | C3, C4 |
| 1 | 0.1uF | Capacitor_SMD:C_0805_2012Metric_Pad1.18x1.45mm_HandSolder | C5 |
| 1 | 100uF | Capacitor_SMD:CP_Elec_5x5.3 | C1 |
| 1 | 10k | Resistor_SMD:R_0805_2012Metric_Pad1.20x1.40mm_HandSolder | R5 |
| 1 | 16MHz | Crystal:Crystal_SMD_5032-2Pin_5.0x3.2mm | Y1 |
| 1 | 470 | Resistor_SMD:R_0805_2012Metric_Pad1.20x1.40mm_HandSolder | R6 |
| 1 | 5k | Resistor_SMD:R_0805_2012Metric_Pad1.20x1.40mm_HandSolder | R7 |
| 1 | ATmega32U4-A | Package_QFP:TQFP-44_10x10mm_P0.8mm | U1 |
| 1 | Conn_01x10 | Connector_PinHeader_2.54mm:PinHeader_1x10_P2.54mm_Vertical | J1 |
| 1 | DHT11 | Sensor:Aosong_DHT11_5.5x12.0_P2.54mm | U3 |
| 1 | ICSP | Connector_PinHeader_2.54mm:PinHeader_2x03_P2.54mm_Vertical | J3 |
| 1 | Jumper_2_Open | Jumper:SolderJumper-2_P1.3mm_Open_TrianglePad1.0x1.5mm | JP1 |
| 1 | LDT-N2804RI | footprints:LDT-N2804RI | LED1 |
| 1 | LOGO | LOGO | G*** |
| 1 | RX | LED_SMD:LED_0805_2012Metric_Pad1.15x1.40mm_HandSolder | D2 |
| 1 | TX | LED_SMD:LED_0805_2012Metric_Pad1.15x1.40mm_HandSolder | D1 |
| 1 | USB_B_Micro | Connector_USB:USB_Micro-B_GCT_USB3076-30-A | J4 |
| 1 | ~ | Button_Switch_SMD:SW_SPST_PTS647_Sx38 | SW1 |
Questions
How big is the First pcb PCB?
It measures 102 × 40 mm and has 2 copper layers, 1.6 mm thick.
What parts does the First pcb use?
50 parts, built around the ATMEGA32U4-AU, DHT11, SK6812MINI-E and T2N7002AK,LM. 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 First pcb KiCad files?
From the Roguillo/projects repository on GitHub, at the commit this page was made from: the board is dice_temphumid_rng_pcb/dice_temphumid_rng_pcb_kicad/first_pcb.kicad_pcb and its schematic Power_sensor_hub/Board/Board.kicad_sch. PCBKit opens the board in the browser, with nothing to install.
Can I use the First pcb design in my own project?
Its repository publishes it under the MIT 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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