Relays, Switches & Logic ICs

Whether you're building an automation system, upgrading a vehicle's lighting, or prototyping your next Arduino project, our Relays, Switches & Logic ICs collection has everything you need. From optocoupler-isolated relay boards and wireless IR remote control modules to tactile push buttons and programmable timer delay relays, we carry a wide range of high-quality electronic switching and control components. These modules are designed for hobbyists, engineers, and professionals who demand reliable, easy-to-integrate solutions for 5V, 12V, and 24V systems alike.

Why Choose Our Relay & Switch Modules?

Wide Voltage Compatibility: Components available for 5V, 12V, and 24V systems to suit a variety of applications.
Arduino & PLC Ready: Plug-and-play compatibility with Arduino, AVR, Raspberry Pi, and industrial PLC setups.
Optocoupler Isolation: Many modules feature optocoupler isolation for safe, noise-free signal switching.
Versatile Form Factors: From compact single-channel modules to 16-channel relay boards for complex automation.
DIY & Professional Grade: Suitable for beginners building their first circuit and seasoned engineers designing production-ready systems.

Applications & Use Cases

Our relay and switch modules are used across a broad spectrum of applications, including:

Home & Industrial Automation: Use multi-channel relay boards to automate lighting, HVAC, and machinery.
Automotive & Motorcycle Electronics: LED flasher relays and forward/reverse motor modules keep your vehicle electronics running smoothly.
Arduino & Microcontroller Projects: Tactile push buttons, slide potentiometers, and touch sensors interface seamlessly with popular development boards.
Safety Systems: Emergency stop paddle switches provide reliable, code-compliant interruption for single-phase machinery.
DIY Electronics Kits: RGB tactile button kits make learning electronics fun and hands-on for makers of all levels.

Learn more: EPA guidance on lithium-ion battery handling

Frequently Asked Questions

Q: What is the difference between a relay module and a MOSFET switch module for Arduino projects?

A: Relay modules use an electromagnetic coil to physically open or close a circuit, making them ideal for switching high-voltage AC or DC loads. MOSFET switch modules, like the 12V 24V Dual MOSFET Programmable Timer Delay Cycle Relay Module, use solid-state transistors for faster, quieter, and more energy-efficient switching of DC loads — with no mechanical wear. Choose relays for heavy-duty or AC applications and MOSFETs for low-noise, high-frequency, or DC-only switching.

Q: Are these relay and switch modules compatible with Arduino and Raspberry Pi?

A: Yes! Most modules in our Relays, Switches & Logic ICs collection are designed to be plug-and-play compatible with Arduino, AVR, and Raspberry Pi platforms. For example, the 16 Channel 5V Relay Board Optocoupler Isolated and the 12x12mm Tactile Push Button Switch Module connect directly to standard GPIO pins, making integration straightforward for both beginners and advanced users.

Q: What does optocoupler isolation mean and why does it matter?

A: Optocoupler isolation means the control circuit (e.g., your Arduino) is electrically separated from the relay's load circuit using a light-based signal. This protects your microcontroller from voltage spikes, back-EMF, and electrical noise generated when switching inductive loads. Modules like the 16-Channel NPN PNP Signal Isolation Conversion PLC Module use this technology to ensure safe, reliable operation in demanding environments.

Q: Can I use a 12V relay module in a 5V Arduino system?

A: Yes — many of our relay modules support multi-voltage operation. For instance, the 1-Channel Wireless IR Remote Control Relay Module supports 5V, 12V, and 24V input, making it easy to pair a 5V Arduino logic signal with a 12V or 24V power supply for the relay coil. Always check the module's datasheet or product page for specific voltage compatibility details.