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If you swap VCC and GND, the module’s power LED won't light, and the transistor won't switch. In Fritzing, double-check your red and black wires at the breadboard level.
This article provides a deep dive into using the within the Fritzing environment. We will cover the relay’s pinout, the difference between the raw relay and a pre-built module, creating or finding the Fritzing part, and a step-by-step wiring tutorial. srd-05vdc-sl-c fritzing
Leo opened Fritzing on his laptop. The digital canvas was a mess of virtual wires until he dragged the SRD-05VDC-SL-C part into the center. If you swap VCC and GND, the module’s