Would a DPDT switch work to turn either one or both devices in this circuit?

Question

I'm doing a replication of vehicle hi/low beam switch in my "lab" and I'm not sure what's the right type of switch for it. It has to have a dedicated on/off switch (the one on the bench power supply doesn't count) so that should be a basic SPST on/off switch that makes or breaks the circuit when PSU is on.

However, there are 2 lights (LEDs) here, one hi beam, one low, and low beam needs to be on by default, and high beam additionally turned on when needed. What is the correct type of switch for this?

The pushbutton is there to flash the light #2.

Answer 1

^{simulate this circuit – Schematic created using CircuitLab}

Figure 1. A circuit suitable for demonstration. A single-pole, double-throw (SPDT) switch is required.

In a real car the headlamps are typically 55 W on filament lamps and the circuit would have to switch more that 10 A into cold filaments. For this reason the switches control relays which do the hard work.

---

I misread the requirement for always on DIPs.

^{simulate this circuit}

Figure 2. A single-pole, single-throw (SPST) switch will suffice.