4-RelayModule
About the 4-RelayModule PCB
4-RelayModule is an open source PCB design by prashantbhandary, published on GitHub. It is a 2-layer board measuring 60 × 75 mm, with 31 components from 14 distinct parts.
By type, the board carries 9 diodes, 9 resistors, 5 connectors and 4 transistors.
From the project
RelayModulePCBDesign
This repository contains a complete KiCad project for a Four Relay Module designed for various control applications. The PCB design allows for controlling up to four independent relays, making it ideal for home automation, industrial control systems, IoT projects, or any application requiring switched power control.
- 4-Channel Relay Control: Independent control of four separate relay channels - Opto-Isolated Design: Safe isolation between the control circuitry and relay switching - Power Options: Compatible with 5V or 12V power supply (depending on relay specifications) - LED Indicators…
4-RelayModule bill of materials (BOM)
31 components, 14 distinct parts.
| Qty | Part | Footprint | Refs |
|---|---|---|---|
| 4 | BC547B | TO-92-3_L4.9-W3.7-P1.27-L | Q1, Q2, Q3, Q4 |
| 1 | TerminalBlock1 | TerminalBlock_Phoenix_PT-1,5-3-5.0-H_1x03_P5.00mm_Horizontal | J1 |
| 1 | TerminalBlock2 | TerminalBlock_Phoenix_PT-1,5-3-5.0-H_1x03_P5.00mm_Horizontal | J2 |
| 1 | TerminalBlock3 | TerminalBlock_Phoenix_PT-1,5-3-5.0-H_1x03_P5.00mm_Horizontal | J3 |
| 1 | TerminalBlock4 | TerminalBlock_Phoenix_PT-1,5-3-5.0-H_1x03_P5.00mm_Horizontal | J4 |
| 1 | Headers Pins | PinHeader_1x06_P2.54mm_Vertical | J5 |
| 4 | SRD-05VDC-SL-C | RELAY-TH_SRD-XXVDC-XL-C | RLY1, RLY2, RLY3, RLY4 |
| 1 | RelayStatusLED1 | LED_D3.0mm | D1 |
| 4 | 1N4007 | D_DO-41_SOD81_P10.16mm_Horizontal | D2, D4, D6, D8 |
| 1 | RelayStatusLED2 | LED_D3.0mm | D3 |
| 1 | RelayStatusLED3 | LED_D3.0mm | D5 |
| 1 | RelayStatusLED4 | LED_D3.0mm | D7 |
| 1 | PWR LED | LED_D3.0mm | D9 |
| 9 | 1K | R_Axial_DIN0204_L3.6mm_D1.6mm_P7.62mm_Horizontal | R1, R2, R3, R4, R5, R6, R7, R8 +1 |
4-RelayModule design files
The KiCad project lives in the prashantbhandary/4-RelayModulePCBDesign repository on GitHub; these links point at the commit this page was built from.
- LayoutRelayModulePCBDesign.kicad_pcb
- SchematicRelayModulePCBDesign.kicad_sch
4-RelayModule: common questions
How big is the 4-RelayModule PCB?
The 4-RelayModule measures 60 × 75 mm, has 2 copper layers and is 1.6 mm thick.
How many components are on the 4-RelayModule?
31 components, from 14 distinct parts. The full bill of materials is listed on this page.
Where can I download the 4-RelayModule design files?
From the prashantbhandary/4-RelayModulePCBDesign repository on GitHub, which has the KiCad layout and the schematic; the links under Design files point to each one.
Can I use the 4-RelayModule design in my own project?
The repository has no license, so all rights stay with prashantbhandary. Use it as a reference, and ask the author before reusing the design.