Robosix
830-Point Solderless Breadboard with 120-Piece Jumper Wire Set
A full-size 830-point breadboard plus 120 jumper wires - the prototyping base every Arduino project starts on.
₹309
₹429
incl. GST
Robosix
4-Channel 5V Relay Module with Optocoupler Isolation
SKU RS-MOD-REL4CH
Switch four 220V AC or 30V DC loads from an Arduino, with opto-isolation keeping mains away from your board.
₹209
₹279
25% off
₹177.12 + 18% GST (₹31.88) · Tax included · You save ₹70
In stock
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About this product
A microcontroller pin can source a few milliamps; a ceiling fan needs rather more. A relay module bridges that gap, letting a 5V logic signal close a contact rated for 10A at 250V AC. Each of the four channels has its own optocoupler, so a fault on the load side stays well away from your Arduino.
Screw terminals take the load wiring, and the common, normally-open and normally-closed contacts let you wire either on-when-triggered or off-when-triggered behaviour. Home automation projects, smart irrigation pumps, automatic street lights and Wi-Fi appliance control with a NodeMCU all use exactly this board.
One note for classrooms: mains wiring must always be done by a teacher or another adult. For student demonstrations we recommend switching a 12V lamp or a small DC pump instead of live AC.
Specifications
| Channels | 4, independently controlled |
|---|---|
| Coil voltage | 5V DC, about 70 mA per active relay |
| Contact rating | 10A at 250V AC / 10A at 30V DC |
| Isolation | Optocoupler on every channel |
| Trigger | Active LOW, works with 3.3V and 5V logic |
| Indicators | Power LED plus a status LED per channel |
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