Arduino Washer/Dryer Alarm System - Tutorial + Code

Pretty cool little project with a lot of good stuff in it that you can easily apply to other applications. I've got a cheap washer & dryer that didn't come with a 'cycle complete' buzzer/alarm, so I'm always forgetting my clothes in there... thus ending up with super wrinkled clothes all the time. Yea, I know, you can easily just not forget you're doing laundry or set a timer on your phone, but why not strap some sensors and an Arduino to your appliances instead? I ended up using a CDS light sensor - sometimes called LDR's, photo resistors, etc... here's one: https://www.digikey.com/product-detai... and that is used to detect the 'cycle complete' light is on for the washer. The dryer was a bit more complicated, so I decided to detect the vibration of the dryer to know whether it's on or off. Here's the piezo I used: https://www.digikey.com/products/en?k... And the opamp I used is here: http://www.digikey.com/products/en?ke... Make sure you check out the wiki to - each board has a dedicated page: http://www.kevindarrah.com/wiki/index... And the low power video:    • Low Power Arduino! Deep Sleep Tutorial   THE CODE IS HERE: http://kevindarrah.com/download/ardui... Check out my Tindie store (trigBoard is available) https://www.tindie.com/stores/kdcircu... Thanks to all the Patrons for dropping a few bucks in the tip jar to help make these videos happen!   / kdarrah   Twitter:   / kdcircuits   For inquiries or design services: https://www.kdcircuits.com