![voltagediagram.JPG voltagediagram.JPG](https://www.electro-tech-online.com/data/attachments/22/22735-f6bb13ca55d6e0a22b45c55c26e1a493.jpg)
The voltages and currents are approximate.
I'm trying to design a circuit to use in my car. The IC is the instrument cluster and the switch is a limit switch. I need to use that limit switch to signal my circuit. It would simplify things alot if I didn't use a diode between the IC and the tap.
I can't quite wrap my head around what's happening when two different voltages and currents meet like this.
The first crude little diagram with the LED works, and nothing has caught fire yet, but I'm wondering if I'm asking for trouble or if there is a safer way. I don't care if the circuit dies but the instrument cluster is very pricey.
The second two diagrams were some other possibilities I thought I might explore.
Thanks,