pls need help...
how can i be able to detect or shall i say im planning to make an open circuit detector/indicator? its like if ever i pull out one among 10 leds in parallel, buzzer is triggered then buzzes... im asking for suggestions or hints

pls im having a hard time thinking about this need help T.T

 

Is that what you really want to do, to detect one (or more) out of 10 being removed? It's going to be a little tricky because you'll need to detect a drop in total current of just 10% of the normal value. You could have a more elaborate system that monitors each LED circuit individually but it's hard to imagine why you would do that.

 

If you remove an LED, the voltage on its power feed pin will go high. You can use that voltage to trigger a driver for the buzzer.