Relay

Integrate reliable switching capability into your circuit designs with our Relay Schematic Modules for KiCAD. These modules are built around SPDT mechanical relays, ideal for controlling AC/DC loads using microcontrollers or logic-level signals.

Each module is designed using best practices and includes:

  • ✅ NPN transistor driver (e.g., 2N2222, BC547, S8050, etc.)
  • ✅ Flyback diode for relay coil protection
  • ✅ Proper base resistor for safe transistor operation
  • ✅ Labeled control input, relay contacts, and supply pins
  • ✅ Options for 5V and 12V relay coils
  • ✅ Clean schematic layout and verified footprints

Included modules:

  • 5V SPDT Non-Isolated Relay Module
  • 12V SPDT Non-Isolated Relay Module
  • (Future additions may include: opto-isolated relays, solid-state relays, 2-channel modules)

Applications:

  • Load switching (lights, motors, solenoids)
  • Home automation and control systems
  • Industrial relay control with microcontrollers
  • Any project that needs isolation between logic and load

These modules save time and reduce risk by providing pre-tested, modular relay driver circuits, ready for direct integration into your schematic designs.