2 layers100 × 100 mm
2 layers100 × 48.5 mm
Electra
Grehasopt/Electra-pcb2Remote Relays Board
- Size
- 100 × 48.5 mm
- Copper layers
- 2
- Thickness
- 1.6 mm
- Parts
- 77
- Nets
- 52
- Pads
- 218
- Tracks, vias
- 506, 292
- Pours
- 6
- Routed
- Yes
- KiCad
- KiCad 5 (file 20171130)
- Created
- 7 Mar 2021
- Updated
- 18 Feb 2025
Overview
Electra is an open-source printed circuit board by Grehasopt, from the Grehasopt/Electra-pcb repository on GitHub, published under the CERN-OHL-S-2.0 licence. It is a 2-layer board of 100 × 48.5 mm with 77 parts on 52 nets, routed with 506 tracks and 292 vias.
It is built around the ESP-12F, AMS1117-3.3 and AMS1117-5.0. Its parts include 19 resistors, 13 connectors, 10 diodes, 7 capacitors and 4 switches. It belongs with the ESP8266 boards of this library.
Main components
3
ESP-12F
SMD,24x16mm-40℃~+85℃ -96dBm 15dBm 2.4GHz 3.3V 375mA 55mA PCB UART WIFI4 SMD,24x16mm WiFi Modules ROHSDOITWiFi Modules
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) RegulatorsAMS1117-5.0
SOT-223-40℃~+125℃ 1 1.3V 15V 1A 5V 60dB Fixed Positive Short Circuit Protection、Thermal shutdown SOT-223 Voltage Regulators - Linear, Low Drop Out (LDO) Regulators ROHSAdvanced Monolithic SystemsVoltage Regulators - Linear, Low Drop Out (LDO) Regulators
README
README.mdElectra
Remote Relays Board
Electra
[!CAUTION]
This project involves the use of 230V AC mains power and contains high-voltage components. Working with mains electricity can be extremely dangerous and may result in serious injury, death, or property damage if not handled correctly.
This design is provided "as-is" and for educational purposes only. Only individuals with the appropriate electrical expertise and experience should attempt to reproduce or work with this project. You are solely responsible for ensuring that your work with this hardware complies with all applicable safety standards, laws, and regulations.
Schematic
Page 1
Page 2
Page 3
Page 4
Page 5
Page 6
Page 7
Page 8
License
This project is licensed under the CERN-OHL-S-2.0 (applies from the very first commit on Mar 7, 2021) with the added condition that it may not be used for commercial purposes without prior permission from the license holder.
Parts
77| Qty | Value | Footprint | References |
|---|---|---|---|
| 7 | 10K | Resistor_SMD:R_0603_1608Metric_Pad0.98x0.95mm_HandSolder | R401, R402, R501, R502, R503, R505, R506 |
| 4 | 1K | Resistor_SMD:R_0603_1608Metric_Pad0.98x0.95mm_HandSolder | R301, R603, R701, R801 |
| 3 | 100uF | Capacitor_SMD:CP_Elec_6.3x5.4 | C201, C204, C205 |
| 3 | 1A | Diode_SMD:D_SMA_Handsoldering | D201, D202, D203 |
| 3 | Jumper_NC_Small | Jumper:SolderJumper-2_P1.3mm_Bridged_RoundedPad1.0x1.5mm | JP201, JP301, JP801 |
| 2 | 10uF | Capacitor_SMD:C_0805_2012Metric_Pad1.18x1.45mm_HandSolder | C202, C203 |
| 2 | 15 | Resistor_SMD:R_0805_2012Metric_Pad1.20x1.40mm_HandSolder | R504, R507 |
| 2 | 200mA | Diode_SMD:D_MiniMELF | D302, D802 |
| 2 | 68 | Resistor_SMD:R_0603_1608Metric_Pad0.98x0.95mm_HandSolder | R302, R802 |
| 2 | FINDER-36.11 | Relay_THT:Relay_SPDT_Finder_36.11 | K301, K801 |
| 2 | LOGO | Custom:Electricity-Causion-6.1mmX6.1mm-logo | G***, G*** |
| 2 | Q_NPN_EBC | Package_TO_SOT_SMD:SOT-323_SC-70 | Q301, Q801 |
| 1 | 0.1uF | Capacitor_SMD:C_0603_1608Metric_Pad1.08x0.95mm_HandSolder | C501 |
| 1 | 2K | Resistor_SMD:R_0603_1608Metric_Pad0.98x0.95mm_HandSolder | R702 |
| 1 | 3.3K | Resistor_SMD:R_0603_1608Metric_Pad0.98x0.95mm_HandSolder | R601 |
| 1 | 3V3 | TestPoint:TestPoint_Pad_D1.5mm | TP204 |
| 1 | 47uF | Capacitor_SMD:C_1206_3216Metric_Pad1.33x1.80mm_HandSolder | C502 |
| 1 | 5V | TestPoint:TestPoint_Pad_D1.5mm | TP203 |
| 1 | 7-12V | Connector_BarrelJack:BarrelJack_Horizontal | J202 |
| 1 | 7.5K | Resistor_SMD:R_0603_1608Metric_Pad0.98x0.95mm_HandSolder | R602 |
| 1 | 82 | Resistor_SMD:R_0603_1608Metric_Pad0.98x0.95mm_HandSolder | R201 |
| 1 | A | Connector_JST:JST_XH_B2B-XH-A_1x02_P2.50mm_Vertical | J601 |
| 1 | A2 | Connector_JST:JST_XH_B2B-XH-A_1x02_P2.50mm_Vertical | J602 |
| 1 | ADC | TestPoint:TestPoint_Pad_D1.5mm | TP601 |
| 1 | AMS1117-3.3 | Package_TO_SOT_SMD:SOT-223-3_TabPin2 | U202 |
| 1 | AMS1117-5.0 | Package_TO_SOT_SMD:SOT-223-3_TabPin2 | U201 |
| 1 | ESP-12F | RF_Module:ESP-12E | U501 |
| 1 | Extra1 | Connector_PinHeader_2.54mm:PinHeader_1x03_P2.54mm_Vertical | J101 |
| 1 | Extra2 | Connector_PinHeader_2.54mm:PinHeader_1x03_P2.54mm_Vertical | J103 |
| 1 | Flash | Button_Switch_SMD:SW_SPST_CK_RS282G05A3 | SW501 |
| 1 | GND | TestPoint:TestPoint_Pad_D1.5mm | TP201 |
| 1 | LOGO | Custom:dc-barrel-positive-polarity-5.1x5 | G*** |
| 1 | LOGO | Custom:Recycle-electronics-10mmx10mm-logo | G*** |
| 1 | PWR | LED_SMD:LED_0603_1608Metric_Pad1.05x0.95mm_HandSolder | D204 |
| 1 | R1 | LED_SMD:LED_0603_1608Metric_Pad1.05x0.95mm_HandSolder | D801 |
| 1 | R2 | LED_SMD:LED_0603_1608Metric_Pad1.05x0.95mm_HandSolder | D301 |
| 1 | RF433 | Connector_PinHeader_2.54mm:PinHeader_1x04_P2.54mm_Vertical | J701 |
| 1 | RST | Button_Switch_SMD:SW_SPST_CK_RS282G05A3 | SW502 |
| 1 | RTC | Connector_PinHeader_2.54mm:PinHeader_1x06_P2.54mm_Vertical | J102 |
| 1 | RX | LED_SMD:LED_0603_1608Metric_Pad1.05x0.95mm_HandSolder | D502 |
| 1 | Relay 1/U | TerminalBlock:TerminalBlock_bornier-3_P5.08mm | J801 |
| 1 | Relay 2/D | TerminalBlock:TerminalBlock_bornier-3_P5.08mm | J301 |
| 1 | S1/U | Connector_JST:JST_XH_B2B-XH-A_1x02_P2.50mm_Vertical | J401 |
| 1 | S2/D | Connector_JST:JST_XH_B2B-XH-A_1x02_P2.50mm_Vertical | J402 |
| 1 | T1 | TestPoint:TestPoint_Pad_D1.5mm | TP801 |
| 1 | T2 | TestPoint:TestPoint_Pad_D1.5mm | TP301 |
| 1 | TX | LED_SMD:LED_0603_1608Metric_Pad1.05x0.95mm_HandSolder | D501 |
| 1 | UART | Connector_PinHeader_2.54mm:PinHeader_1x04_P2.54mm_Vertical | J104 |
| 1 | USB | Connector_USB:USB_Micro-B_Molex-105017-0001 | J201 |
| 1 | Vin | TestPoint:TestPoint_Pad_D1.5mm | TP202 |
The 72 most common of 77 parts.
Questions
How big is the Electra PCB?
It measures 100 × 48.5 mm and has 2 copper layers, 1.6 mm thick.
What parts does the Electra use?
77 parts, built around the ESP-12F, AMS1117-3.3 and AMS1117-5.0. 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 Electra KiCad files?
From the Grehasopt/Electra-pcb repository on GitHub, at the commit this page was made from: the board is pcb/Electra/Electra.kicad_pcb. PCBKit opens the board in the browser, with nothing to install.
Can I use the Electra design in my own project?
Its repository publishes it under the CERN-OHL-S-2.0 licence: you may reuse it on that licence's terms (keep the author's notice, and for a copyleft licence share your changes alike).
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