DIY Mini Traffic Light LED Display Board Module 3.3-5V 8mm Common Cathode Interface Compatible with Arduino and Raspberry Pi Including E-Book! (Pack of 5)

the Traffic light LED'S arrive very quickly, i applied a 3v voltage to the LED'S via a 220 ohm resistor as instructed in the info on this page, nothing worked. on a closer look these have the resistors already fitted, tried again and all working, the only niggle is the the green LED is not as bright as the other's hence the stars rating, on further inspection they have the same resistor value of 330 ohms. i cannot send these back as i have change the resistor value of the green LED to 220 ohms and they are very much the same brightness

I bought the 5 item set, which oddly was cheaper than the 3 item set. They are dead easy to add to an arduino or raspberry pi. The pins already have resistors, so just patch to 3 digital pins and ground and have fun. There are bigger than I expected , but I plan to put them on my train layout. AZ Delivery components always seems to be high quality. Recommended