I have two things I want to quickly ask, but let me preface this by saying that I am infact new to the Arduino board and micro controllers. So my questions are:
Is it harmful for me to run multiple LED's from one pin on a breadboard? For example, I want 4 LED's to turn on simultaneously, so the need for individual control is unnecessary, so I wired my first LED to pin 13 on my breadboard with a 330 resistor on the cathode, and then ran 3 more wires from that same breadboard row, so a to provide 3 other LED's with power as I do the same for the first LED that I wired to pin 13. Yes I see that it does light up all 4 LED's but my question is it harmful for the LED's to do this? all 4 are on 330 ohm resistors.
This is a matter of suggestion perhaps. For the project I'm working on I need some way to electronically lock a box using my Arduino. My original thoughts were to use a servo to push or pull a pin through a loop connected to the lid. So that when the pin was pushed in the loop the lid could not open until a button is pushed and the pin was pulled back out. My father's suggestion though, who is helping me with the woodworking of this project, suggested using an actuator instead? Which from what I understand is basically the pin built into the electronics? So my question is, should I use a servo/actuator/ or something else? and if an actuator is indeed the route to go, does anyone know of one I could get that would work with my Arduino Uno quite easily?
Thanks for the help,