8 Channel 5V Relay Shield for ESP32 30 Pin DEVKIT V1
8 Channel 5V Relay Shield for ESP32 30-Pin DEVKIT V1
The 8 Channel 5V Relay Board is a plug-and-play shield designed specifically for the ESP32 30-pin DEVKIT V1 development board. It provides eight independent 5V relays, each capable of switching up to 10A at 250VAC or 30VDC, making it perfect for home automation, industrial control, and IoT projects. With onboard optocouplers and driver transistors, it ensures reliable isolation between the ESP32 and high-power circuits.
Key Specifications
| Specification | Value |
|---|---|
| Relay Type | 5V SPDT |
| Number of Channels | 8 |
| Maximum Switching Load | 10A @ 250VAC / 30VDC |
| Control Interface | Direct stackable header for ESP32 30-pin DEVKIT V1 |
| Isolation | Per-channel optocoupler (PC817 or similar) |
| Indicator | Red LED per relay for status |
What You Can Build With This
- Home automation: Control lights, fans, or appliances with your ESP32 via Wi-Fi.
- IoT plant watering system: Switch water pumps and solenoid valves on schedule.
- Smart garage door controller: Automate door open/close with relay logic.
- Industrial machine control: Interface with contactors for motor control.
Compatibility
This board is engineered to stack onto ESP32 30-pin DEVKIT V1 boards. It may also work with other ESP32 dev boards that share the same pinout—always verify pin mapping before use. For non-ESP32 setups, the relay inputs can be manually wired to any 5V microcontroller like Arduino Uno or Mega using jumper wires. The relay coils require 5V, so ensure your power source can deliver sufficient current when activating multiple relays.
Wiring Notes
Stack the shield onto the ESP32 DEVKIT V1, aligning the 30-pin headers. The relays are active LOW: they energize when the corresponding GPIO outputs LOW (0). Each channel has a jumper to assign a GPIO pin. To avoid voltage drops, power the ESP32 via its USB port or an external 5V supply capable of at least 500mA if all relays are driven simultaneously. Always use appropriately rated wires and secure connections at the screw terminals.
Why Buy from Compoden
Every component is sourced from verified suppliers and tested for compatibility before listing. We've spent 10 years building projects for makers, schools, and institutions across India. Ships from Bengaluru in 3-5 days. If defective on arrival, replace within 7 days.
Is this compatible with ESP32 38-pin boards?
No, this shield is specifically designed for the 30-pin DEVKIT V1. It will not directly fit 38-pin ESP32 boards due to different pin spacing and header layout.
How much current can each relay handle?
Each relay is rated for up to 10A at 250VAC or 30VDC. Do not exceed these ratings to prevent overheating and damage.
Can I power the relays from the ESP32 5V pin?
Yes, but if driving all 8 relays simultaneously, the total current draw may exceed the ESP32's onboard 5V regulator capacity. We recommend using an external 5V supply for full load.
📦 Free Setup Handoff Document Included
Every Compoden order includes a free setup handoff document — step-by-step instructions to get your component working within minutes. Download it via QR code on your package. The handoff document is also trained to help you troubleshoot the majority of problems.
Ask Soldr above what you can build with this — it knows every Compoden kit this part appears in.
Shipping Information
- Prepaid Orders: ₹75 for orders up to ₹999, FREE shipping above ₹999
- COD Orders: ₹125 shipping + ₹50 COD fee = ₹175 total
- Delivery Timeline: Dispatch in 1-2 days, delivery in 2-7 days depending on location
Returns & Warranty
- 7-Day Return: Manufacturing defects only (approval required)
- Warranty: 7 days from delivery
- Non-Returnable: Batteries, consumables, cut wires, clearance items