General Electronics chit-chat.
This category is to be used for general advice and conversation relating to electronics.
Discussions can be anything from “what are the different types of Arduinos for?” to “let’s discuss the new Raspberry Pico!”
My friend has asked me to make them a cybernetic-style eyepatch that must have a red eye/light emitting from it.
So what kind of electronics would I need for this? Ideally it would need to have a switch and have some type of battery
I’d get a lillypad and an led module.
The lilypad below is the big one
THere’s a smaller one (LilyTiny - DEV-10899 - SparkFun Electronics)
And an LED module
The tinypad can be powered by a 2232 battery
You can sew all of that in your patch using some conductive thread
Maybe DiyElectronics can get you all those things if you ask nicely 
Have fun! Send pictures when you’re done!