Check out this great project shared by Paul in the Adafruit Support Forums:
I’m creating a project to pull a string when a cat enters a door to cause the door to close behind her. The door is a standard screen door with a standard door closer. I want to prop the door open with a small stick, attach a string between it and one of your 9v solenoids. I’m building a circuit to activate the solenoid when the cat crosses a laser beam….
Thanks for all the help. I ended up using the 24v DC converter/power supply. It worked very well with the solenoid pulling on one end of a stick holding the door open. I had to work on the door to get it to close and latch properly. Here are pics of the final rig (overview, & control center), plus a pic of my cat Stella, safely at home.
Have an amazing project to share? Join the SHOW-AND-TELL every Wednesday night at 7:30pm ET on Google+ Hangouts.
Join us every Wednesday night at 8pm ET for Ask an Engineer!
Learn resistor values with Mho’s Resistance or get the best electronics calculator for engineers “Circuit Playground” – Adafruit’s Apps!
Maker Business — Makers and car advertising
Wearables — Battery save
Electronics — A way around surface mount snags
Biohacking — How Silicon Valley Is Trying to Hack Its Way Into a Longer Life
No comments yet.
Sorry, the comment form is closed at this time.