Email notification bell

Step 6 Build: Install the electromagnet

Mount the electromagnet onto the stripboard somehow, and position it under the clapper so that there is enough room for the clapper to swing at the bell.  If your solenoid is too long, you might have to cut a hole in the stripboard, if it's too short, you will had to add some spacers in there.

To secure it, hot glue or epoxy resin would be a good choice, I cut up some plastic, and used that to anchor mine down (didn't have any glue)

At this point, you could try to test to see the if the solenoid will pull the clapper down, you may need to screw the plunger in first otherwise the clapper will be too far away.  Use a regulated power supply if you can (or one that won't be damaged if the solenoid draws too much current, three or four old alkaline AA batteries would work).

For the third time: WARNING: This project involves powering a home-made solenoid via the USB port, which may risk damage to your computer if your solenoid draws too much current. I highly recommend using a cheap powered USB hub. I accept no responsibility for any injury to you or damage to your equipment or property should you choose to attempt this. Please proceed AT YOUR OWN RISK.