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Description: 1. The 8-CH 12V ULN2003 Based Relay Board is an expandable IoT component designed to operate eight relay switches, each capable of handling up to 12V DC and 500mA maximum current. 2. Relay Switches: Each relay switch functions as a normally open (NO) electrical contact that can be electronically controlled via digital inputs. This makes it ideal for managing power to external devices or appliances. 3. ULN2003 ICs: The board utilizes the ULN2003 Darlington array integrated circuits, which enable the control of inductive loads while ensuring protection against voltage spikes and back EMF that may damage the controlling electronics. 4. Input Voltage: This IoT component accepts a 5V DC input voltage, making it compatible with various microcontroller and single-board computer platforms like Arduino, Raspberry Pi, etc. 5. Opto-Isolated Inputs: The relay board features opto-isolated inputs which provide galvanic isolation between the control circuitry and the switching contact, ensuring
| Specification | Details |
|---|---|
| Voltage Rating | 12V DC |
| Number of Channels | 8 Relay Channels |
| Relay Type | ULN2003 ( Darlington Transistor Array) |
| Load Capacity | Up to 250V 10A (Resistive Load) |
| Operating Temperature | -20°C to +60°C |
| Dimensions | Approx. 5.8cm x 4.2cm x 1.3cm |
| Weight | Approx. 50g |
| PCB Material | FR-4 (Flame Retardant High-Quality) |
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