.... if I can figure that out.
it is pretty easy actually. Plug an ethernet cable from you PC to another switch port on your cheap router. (NOT the WAN port, just one of its switch ports) Set its IP address in the same subnet as your network, but on a non conflicting IP address. I usually set these type of appliances at the top end of a /24 subnet, as for instance like 192.168.0.
250 Not at the exact top, but near the top. and I usually have my network router for instance on the first usable address like 192.168.0
.1 But anyway I digress.... put the router you intend to be an access point on your network on a non conflicting address. Now turn
off the DHCP server in this router so it does not try to hand out any IP address's to anything that connects with it. Unhook your pc and then Hook up that ethernet cable to a switch port on your regular network (spare router Ethernet port or other switch port). Remember to leave the other end of the ethernet cable in a switch port on your junk router/now access point.
You should be good to go by placing this old router/access point where you need it, and its hardwired back to you wired network. It won't hand out addresses by itself, but it will hand out IP addresses from your main router with the main router as the default gateway. Its all good.
You now have an access point for small dollars (if any), and about 3 minutes work with your pc in setting it up.