What is a switch? It connects devices to a power source and directs electrical signals.
What is a switch? It connects devices to a power source and directs electrical signals.
You're navigating a bit of a tricky setup... Using your existing router as a bridge could work if connected properly. Just make sure it's set up correctly to relay the signal. A switch would require a router or modem, which might not be ideal for keeping things wired-free. If you configure the old router as a wireless bridge, that should be fine. Your home theater setup is already using it, so it seems like a practical choice.
You're asking if it's possible to use a single switch instead of connecting both the old router and your PC directly to the main router. The idea is to route traffic through the switch, which would simplify the setup. Your diagram suggests this approach could work, but you should verify compatibility and ensure the switch can handle the load.
Does your older router still have LAN ports? You can link the main router to the access point with one cable, and then connect your computer to the AP. The AP will function as a small switch and also broadcast WiFi. Make sure to turn off DHCP so you avoid double NAT. If you're unsure about the steps, look up instructions on converting a router into an AP—there are many helpful guides available.