TL;DR: Read the bulleted list below.
I can't change this circuit because it is locked inside the button's plastic body, so swapping the resistor/LEDs isn't a possibility. Also, I couldn't determine the LEDs specific part number; the manufacturer of the buttons didn't gave me any info about it's circuit. I believe they are 0805 white LED's with 2.8V Vf and 20mA If. And the resistors also seem to be in 0805 packaging.
The J1 and J2 are the connectors where I will wire up all buttons in parallel. The V1 voltage source is placed there only for simulation purposes. So, now I make these questions:
- Is this current source okay to drive my button's LEDs? Considering the 1/8W supposed limitation of the internal resistors.
- Does this over voltage protection circuit works?