2 layers243.8 × 134.6 mm
WeatherStation
scabootssca/weatherstation
Needs Src/shared/config.h made with this format:
81 partsGPL-3.0
2 layers271.8 × 185.4 mm
Sram redo
scabootssca/weatherstationNeeds Src/shared/config.h made with this format:
- Size
- 271.8 × 185.4 mm
- Copper layers
- 2
- Thickness
- 1.6 mm
- Parts
- 81
- Nets
- 90
- Pads
- 294
- Tracks, vias
- 381, 39
- Routed
- Yes
- KiCad
- KiCad 4
- Created
- 15 Dec 2017
- Updated
- 19 Nov 2025
Overview
Sram redo is an open-source printed circuit board by scabootssca, from the scabootssca/weatherstation repository on GitHub, published under the GPL-3.0 licence. It is a 2-layer board of 271.8 × 185.4 mm with 81 parts on 90 nets, routed with 381 tracks and 39 vias.
It is built around the ATMEGA328P-PU, 23LC1024-E/P and MCP1826-ADJE/AT, with the MCP23008-E/P, FQP27P06 and FQP30N06L among its other parts. Its parts include 24 resistors, 20 capacitors, 12 connectors, 8 ICs and 7 transistors. It belongs with the home automation and IoT boards and the ESP8266 and AVR (ATmega, ATtiny) boards of this library.
Main components
7
ATMEGA328P-PU
DIP-28-300mil-40℃~+85℃ 1.8V~5.5V 10bit 1KB 20MHz 23 2KB 32KB 8 Bit AVR Built-in FLASH DIP-28-300mil Microcontrollers (MCU/MPU/SOC) ROHSMicrochip TechnologyMicrocontrollers (MCU/MPU/SOC)
23LC1024-E/P
PDIP-8-40℃~+125℃ 10mA 1Mbit 2.5V~5.5V 4uA SPI PDIP-8 SRAM ROHSMicrochip TechnologySRAM
MCP1826-ADJE/AT
TO-220-5-40℃~+125℃ 1 1A 220uA 60dB@(100Hz) 6V 800mV~5V Adjustable Positive Under Voltage Lockout、Over Current Protection、Over Temperature Protection、Short Circuit Protection TO-220-5 Voltage Regulators - Linear, Low Drop Out (LDO) Regulators ROHSMicrochip TechnologyVoltage Regulators - Linear, Low Drop Out (LDO) Regulators
MCP23008-E/P
PDIP-18-40℃~+125℃ 1.7MHz 1.8V~5.5V 1uA 600mV 8 8 8.5mA I2C Interrupt Output Reset function、Cascade and address expansion PDIP-18 I/O Expanders ROHSMicrochip TechnologyI/O Expanders
FQP27P06
TO-220-55℃~+175℃ 1 P-Channel 1.4nF 120W 27A 43nC@10V 4V 60V 70mΩ@10V TO-220 MOSFETs ROHSonsemiMOSFETsFQP30N06L
TO-220-3-55℃~+175℃ 1 N-channel 1.04nF 2.5V 20nC 32A 350pF 35mΩ@10V 60V 65pF 79W N-Channel ±20V TO-220-3 MOSFETs ROHSonsemiMOSFETs
TL1431AIZT
TO-92-3-40℃~+105℃@(Ta) 1.5uA 100mA 100ppm/℃ 2.493V~36V 2.5V~36V 700uA Adjustable Parallel ±0.25% TO-92-3 Voltage Reference ROHSSTMicroelectronicsVoltage Reference
README
README.mdNeeds Src/shared/config.h made with this format:
config.h
#ifndef _CONFIG_H_
#define _CONFIG_H_
#define SERVER_IP_ADDRESS "XXX.XXX.XXX.XXX"
#define SERVER_PORT 80
#define MY_IP XXX, XXX, XXX, XXX
#define GATEWAY_IP XXX, XXX, XXX, XXX
#define SUBNET_MASK XXX, XXX, XXX, XXX
#define WIFI_SSID "XXXXXXXXXXX"
#define WIFI_PASS "*******************"
#define GMT_OFFSET XX (-X or just X in hours)
#define ESP_ATMEGA_BAUD_RATE 4800
#endifParts
81| Qty | Value | Footprint | References |
|---|---|---|---|
| 6 | 10K | Resistors_THT:R_Axial_DIN0207_L6.3mm_D2.5mm_P7.62mm_Horizontal | R16, R17, R18, R19, R20, R22 |
| 5 | 100nF | Capacitors_THT:C_Disc_D5.0mm_W2.5mm_P2.50mm | C3, C5, C8, C10, C20 |
| 4 | 100nF | Capacitors_THT:C_Disc_D5.0mm_W2.5mm_P5.00mm | C6, C11, C17, C18 |
| 4 | FQP27P06 | TO_SOT_Packages_THT:TO-220-3_Vertical | Q2, Q3, Q5, Q7 |
| 3 | 10K | Resistors_THT:R_Axial_DIN0207_L6.3mm_D2.5mm_P5.08mm_Vertical | R1, R4, R24 |
| 3 | FQP30N06L | TO_SOT_Packages_THT:TO-220-3_Vertical | Q1, Q4, Q6 |
| 2 | 10uF | Capacitors_THT:C_Disc_D5.0mm_W2.5mm_P5.00mm | C1, C4 |
| 2 | 120 | Resistors_THT:R_Axial_DIN0207_L6.3mm_D2.5mm_P2.54mm_Vertical | R2, R5 |
| 2 | 20pF | Capacitors_THT:C_Disc_D5.0mm_W2.5mm_P5.00mm | C15, C16 |
| 2 | 220 | Resistors_THT:R_Axial_DIN0207_L6.3mm_D2.5mm_P15.24mm_Horizontal | R14, R15 |
| 2 | 470uF | Capacitors_THT:CP_Radial_D8.0mm_P2.50mm | C13, C14 |
| 1 | 1.1K | Resistors_THT:R_Axial_DIN0207_L6.3mm_D2.5mm_P7.62mm_Horizontal | R9 |
| 1 | 100K | Resistors_THT:R_Axial_DIN0207_L6.3mm_D2.5mm_P5.08mm_Vertical | R7 |
| 1 | 100k | Resistors_THT:R_Axial_DIN0207_L6.3mm_D2.5mm_P7.62mm_Horizontal | R21 |
| 1 | 100k | Resistors_THT:R_Axial_DIN0207_L6.3mm_D2.5mm_P5.08mm_Vertical | R8 |
| 1 | 100uF | Capacitors_THT:CP_Radial_D5.0mm_P2.50mm | C7 |
| 1 | 10k | Resistors_THT:R_Axial_DIN0207_L6.3mm_D2.5mm_P5.08mm_Vertical | R3 |
| 1 | 10uF | Capacitors_THT:C_Disc_D5.0mm_W2.5mm_P2.50mm | C2 |
| 1 | 10uF | Inductors_THT:L_Axial_L5.3mm_D2.2mm_P7.62mm_Horizontal_Vishay_IM-1 | L1 |
| 1 | 16MHz | Crystals:Crystal_HC49-4H_Vertical | Y1 |
| 1 | 1k | Resistors_THT:R_Axial_DIN0207_L6.3mm_D2.5mm_P2.54mm_Vertical | R6 |
| 1 | 1k | Resistors_THT:R_Axial_DIN0207_L6.3mm_D2.5mm_P5.08mm_Vertical | R23 |
| 1 | 220uF | Capacitors_THT:CP_Radial_D6.3mm_P2.50mm | C9 |
| 1 | 23LC1024 | Housings_DIP:DIP-8_W7.62mm | U5 |
| 1 | 3.6v | Battery_Holders:Keystone_1042_1x18650 | BT1 |
| 1 | 39K | Resistors_THT:R_Axial_DIN0207_L6.3mm_D2.5mm_P2.54mm_Vertical | R13 |
| 1 | 3K | Resistors_THT:R_Axial_DIN0207_L6.3mm_D2.5mm_P7.62mm_Horizontal | R10 |
| 1 | 4.7uF | Capacitors_THT:CP_Radial_D5.0mm_P2.50mm | C19 |
| 1 | 47uF | Capacitors_THT:CP_Radial_D5.0mm_P2.50mm | C12 |
| 1 | 5.6K | Resistors_THT:R_Axial_DIN0207_L6.3mm_D2.5mm_P5.08mm_Vertical | R12 |
| 1 | 820 | Resistors_THT:R_Axial_DIN0207_L6.3mm_D2.5mm_P7.62mm_Horizontal | R11 |
| 1 | ATmega328P-PU | Housings_DIP:DIP-28_W7.62mm | U3 |
| 1 | BME Connector | Connectors_JST:JST_XH_B04B-XH-A_04x2.50mm_Straight | J5 |
| 1 | BME Connector | WeatherLibrary:JST_XH_B04B-XH-A_04x2.54mm_Straight | J7 |
| 1 | BME280Breakout | Pin_Headers:Pin_Header_Straight_1x04_Pitch2.54mm | U4 |
| 1 | Conn_01x02 | Connectors_JST:JST_XH_B02B-XH-A_02x2.50mm_Straight | J11 |
| 1 | Conn_01x05 | Connectors_JST:JST_XH_B05B-XH-A_05x2.50mm_Straight | J8 |
| 1 | Conn_01x05 | WeatherLibrary:JST_XH_B07B-XH-A_07x2.54mm_Straight | J4 |
| 1 | D_Schottky | Diodes_THT:D_DO-15_P12.70mm_Horizontal | D2 |
| 1 | D_Schottky | Diodes_THT:D_DO-15_P15.24mm_Horizontal | D1 |
| 1 | ERROR LED | WeatherLibrary:LED_D5.0mm_7.62mm | D5 |
| 1 | ESP Connector | Connectors_JST:JST_XH_B07B-XH-A_07x2.50mm_Straight | J9 |
| 1 | ESP Connector | Connectors_JST:JST_XH_B06B-XH-A_06x2.50mm_Straight | J10 |
| 1 | ICSP Header | Pin_Headers:Pin_Header_Straight_1x05_Pitch2.54mm | J3 |
| 1 | Jumper | Pin_Headers:Pin_Header_Straight_1x02_Pitch2.54mm | JP1 |
| 1 | Lux Connector | WeatherLibrary:JST_XH_B05B-XH-A_05x2.54mm_Straight | J6 |
| 1 | MCP1826-ADJ | TO_SOT_Packages_THT:TO-247-5_Vertical | U1 |
| 1 | MCP23008 | Housings_DIP:DIP-18_W7.62mm | U7 |
| 1 | NodeMCU_1.0_(ESP-12E) | WeatherLibrary:ESP8266_NODEMCU | U6 |
| 1 | OK LED | WeatherLibrary:LED_D5.0mm_7.62mm | D4 |
| 1 | RTCModule | WeatherLibrary:DS1307_BASED_RTC | U8 |
| 1 | Rain_Conn | Connectors_JST:JST_XH_B02B-XH-A_02x2.50mm_Straight | J12 |
| 1 | SW_RESET | Buttons_Switches_THT:SW_Tactile_Straight_KSA0Axx1LFTR | SW1 |
| 1 | SolarPanels | Connectors_JST:JST_XH_B04B-XH-A_04x2.50mm_Straight | J1 |
| 1 | TC4056A_BASED_CHARGER | WeatherLibrary:TC4056_BREAKOUT | U2 |
| 1 | TL1431AIZT | WeatherLibrary:TO-92_Staggered_Pins_Wide | D3 |
| 1 | TowerPlug | Connectors_JST:JST_XH_B04B-XH-A_04x2.50mm_Straight | J2 |
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Questions
How big is the Sram redo PCB?
It measures 271.8 × 185.4 mm and has 2 copper layers, 1.6 mm thick.
What parts does the Sram redo use?
81 parts, built around the ATMEGA328P-PU, 23LC1024-E/P, MCP1826-ADJE/AT and MCP23008-E/P. 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 Sram redo KiCad files?
From the scabootssca/weatherstation repository on GitHub, at the commit this page was made from: the board is Schematic/sram_redo.kicad_pcb. PCBKit opens the board in the browser, with nothing to install.
Can I use the Sram redo 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).