If you don't have a projector but still want to project your laptop screen onto a wall, there are a few methods you can use:
Method 1: Use a TV
If you have a TV with an HDMI input, you can connect your laptop to the TV using an HDMI cable. Once connected, set the TV to the HDMI input and your laptop screen should be displayed on the TV. Then, position the TV in front of the wall you want to project onto and adjust the size and orientation of the image as needed.
Method 2: Use a streaming device
If you have a streaming device, such as a Chromecast or Amazon Fire Stick, you can use it to mirror your laptop screen to your TV. Connect the streaming device to the TV and connect your laptop to the same Wi-Fi network as the streaming device. Then, use the screen mirroring feature on your laptop to display the screen on the TV. Again, position the TV in front of the wall you want to project onto and adjust the image size and orientation as needed.
Method 3: Use a whiteboard or a sheet
If you don't have a TV or streaming device, you can still project your laptop screen onto a wall by using a whiteboard or a white sheet. Position the whiteboard or sheet in front of the wall you want to project onto and place your laptop in front of it. Then, use a projector app or software, such as iProjector or AirServer, to project your laptop screen onto the whiteboard or sheet.
While these methods may not be as high-quality as using a projector, they can be a good alternative if you don't have a projector available.