The wiring diagram PDF and many product pictures show that the relay is a 3V relay (SRD-03VDC-SL-C). However my board which I got from eBay arrived with a 5V relay (SRD-05VDC-SL-C). Everything works just fine. How is that possible? Do you also noticed this with your boards? Is it just that 3.3V is enough to switch the relay or did the wiring change?
The wiring diagram PDF and many product pictures show that the relay is a 3V relay (SRD-03VDC-SL-C). However my board which I got from eBay arrived with a 5V relay (SRD-05VDC-SL-C). Everything works just fine. How is that possible? Do you also noticed this with your boards? Is it just that 3.3V is enough to switch the relay or did the wiring change?