Review on 💡 Uxcell A12062900ux0259 DPDT Power Relay – 10 x DC 5V Coil, 8 Pins - HK19F by Jason Gopinath

These are nice little relays with normally open and normally closed contacts. I've used them in homemade circuit boards to control signal lights in a mock train. The green light is on in the N/C position and the red light is on when the relay is activated by the infrared switch. I added a capacitor and resistor to delay the relay a bit so the lights don't flicker back and forth between the gaps between cars.