Setup is straightforward, with the Arduino's digital IO pins directly wired up to the alarm's output signals. An XBee wireless module was added, since the alarm control panel is some distance away ...

If you want to do a quick design for 3D printing, Tinkercad is pretty easy to use. Although it was briefly in danger of going out of business, it was bought by AutoDesk who have made a lot of impro… ...

DIY Burglar Alarm Sends You a Text Message Whenever It Detects Motion. Whitson Gordon. May 4, 2012 If you want to keep ... All you need is an Arduino, a motion sensor, ...

so tinkercad has circuit designand arduno now, a real arduino is $20, IDE is free, fritzing is free and does all the exact same layout stuff locally, you save your files and keep them forever.