I have a couple of switches that I've wired to an LED so it lights up when pressed, but I recently realized the switches are normally closed (NC). The circuit is running on 3.3V. Is there a way to convert this setup to use normally open (NO) switches instead? If not, what would be the best way to achieve the same result?
1 Answer
You can definitely change those NC switches to behave like NO switches! A popular method is to use an inverter or a NOT gate, which you can find plenty of circuit designs for online. Another simple approach is to let some current flow through the switch itself, which is actually a common setup for things like night lights. Check out this simple circuit diagram [here](https://www.falstad.com/circuit/circuitjs.html?ctz=CQAgjCAMB0l3BWcMBMcUHYMGZIA4UA2ATmIxAUgoqoQFMBaMMAKDEJREP3GM8Lx5enTgBM6AMwCGAVwA2AFwZy6o8FA0xIrAOZdBw-UJQoALJpYAnLjzB8KKIXc5Uw8FgCUHT+6byv7KipTWk0oaAQWAGcbH34eTBcNBUsZOhY9bmMMeKFccyCWAA8KNxAUbHJuERCQczMQAAcZKIALAB0ogFt0oA). Let me know if you need any more help!
I also didn’t understand the link you provided.
I don’t quite get the schematic 😅.