I am a beginner for using the Arduino uno board and I need some help. A lot of my work at home are building models for a hobby. I saw the Arduino on the internet and saw that you can program it to make LEDs flash. I just need to know how many LEDs can I run on the chip also can i program the chip and take it out of the Arduino add it to a PCB. I'm building a model and I need to put some flashing lights on it a lot of lights. Can you guys help thanks.