2 layers
2 layers
Esp8266 4relays
akram202/PCB_PROJECT_- Copper layers
- 2
- Thickness
- 1.6 mm
- Parts
- 43
- Nets
- 72
- Pads
- 178
- Tracks, vias
- 0, 0
- Routed
- Not yet
- KiCad
- KiCad 9.0 (file 20241229)
- Created
- 10 Oct 2026
- Updated
- 10 Oct 2026
Overview
Esp8266 4relays is an open-source printed circuit board by akram202, from the akram202/PCB_PROJECT_ repository on GitHub, published under the MIT licence. It is a 2-layer board with 43 parts on 72 nets.
It is built around the CH340C, ESP-12F and IRLML2502TRPBF, with the AMS1117-3.3, KMR211GLFS and SK6812 among its other parts. Its parts include 11 ICs, 10 capacitors, 8 resistors, 6 diodes and 6 switches. It belongs with the ESP8266 boards of this library.
Main components
6
CH340C
SOP-16-20℃~+70℃ 2Mbps 3.3V、5V 50uA 7mA Transceiver USB 2.0 SOP-16 USB Converters ROHSWCH (Nanjing Qinheng Microelectronics)USB Converters
ESP-12F
SMD,24x16mm-40℃~+85℃ -96dBm 15dBm 2.4GHz 3.3V 375mA 55mA PCB UART WIFI4 SMD,24x16mm WiFi Modules ROHSDOITWiFi Modules
IRLML2502TRPBF
SOT-23-55℃~+150℃ 1 N-channel 1.25W 1.2V 12nC 20V 4.2A 45mΩ@4.5V 66pF 740pF 90pF N-Channel SOT-23 MOSFETs ROHSInfineon TechnologiesMOSFETs
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
KMR211GLFS
SMD-40℃~+85℃ 1.2N 2.6mm 200,000 Cycles 32V 4.2mm 50mA Gull Wing No Round Button SPST-NO Surface Mount,Vertical Without Bracket SMD Tactile Switches ROHSC&KTactile Switches
SK6812
SMD-4P,5.4x5mm-40℃~+85℃ 0.6mA 1.6mm 120° 160mcd~320mcd 1kHz 2000V 280mcd~515mcd 3.7V~5.5V 460nm~470nm 520nm~530nm 620nm~625nm 800Kbit/s 815mcd~1275mcd Built-in power-on reset circuit Semi-transparent lens SMD-4P,5.4x5mm RGB LEDs(Built-in IC) ROHSOPSCO OptoelectronicsRGB LEDs(Built-In IC)
Parts
43| Qty | Value | Footprint | References |
|---|---|---|---|
| 7 | 0.1uF | Capacitor_SMD:C_0805_2012Metric_Pad1.18x1.45mm_HandSolder | C1, C5, C8, C9, C10, C11, C12 |
| 5 | 10k | Resistor_SMD:R_0805_2012Metric_Pad1.20x1.40mm_HandSolder | R2, R5, R6, R7, R8 |
| 5 | LED | LED_SMD:LED_0805_2012Metric_Pad1.15x1.40mm_HandSolder | D1, D3, D4, D5, D6 |
| 4 | IRLML2502TRPBF | Package_TO_SOT_SMD:SOT-23 | U5, U7, U9, U11 |
| 4 | PC817 | Package_DIP:DIP-4_W7.62mm | U4, U6, U8, U10 |
| 4 | SANYOU_SRD_Form_C | Relay_THT:Relay_SPDT_SANYOU_SRD_Series_Form_C | K1, K2, K3, K4 |
| 2 | 0u1F | Capacitor_SMD:C_0805_2012Metric_Pad1.18x1.45mm_HandSolder | C2, C4 |
| 2 | 5.1K | Resistor_SMD:R_0805_2012Metric_Pad1.20x1.40mm_HandSolder | R3, R4 |
| 2 | KMR211GLFS | Button_Switch_SMD:SW_Push_1P1T_NO_CK_KMR2 | SW1, SW3 |
| 1 | 22uF | Capacitor_SMD:C_0805_2012Metric_Pad1.18x1.45mm_HandSolder | C3 |
| 1 | 680 | Resistor_SMD:R_0805_2012Metric_Pad1.20x1.40mm_HandSolder | R1 |
| 1 | AMS1117-3.3 | Package_TO_SOT_SMD:SOT-223-3_TabPin2 | U3 |
| 1 | CH340C | Package_SO:SOIC-16_3.9x9.9mm_P1.27mm | U2 |
| 1 | Conn_01x08 | Connector_Hirose:Hirose_DF13-08P-1.25DSA_1x08_P1.25mm_Vertical | J3 |
| 1 | ESP-12F | RF_Module:ESP-12E | U1 |
| 1 | SK6812 | LED_SMD:LED_SK6812_PLCC4_5.0x5.0mm_P3.2mm | D2 |
| 1 | USB_C_Receptacle_USB2.0_14P | Connector_USB:USB_C_Receptacle_HRO_TYPE-C-31-M-12 | J1 |
Questions
What parts does the Esp8266 4relays use?
43 parts, built around the CH340C, ESP-12F, IRLML2502TRPBF and AMS1117-3.3. 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 Esp8266 4relays KiCad files?
From the akram202/PCB_PROJECT_ repository on GitHub, at the commit this page was made from: the board is esp8266_4relays/1.kicad_pcb and its schematic DataStream-MP/esp32_24bit.kicad_sch. PCBKit opens the board in the browser, with nothing to install.
Can I use the Esp8266 4relays 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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