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.
Stop breadboarding and soldering – start making immediately! Adafruit’s Circuit Playground is jam-packed with LEDs, sensors, buttons, alligator clip pads and more. Build projects with Circuit Playground in a few minutes with the drag-and-drop MakeCode programming site, learn computer science using the CS Discoveries class on code.org, jump into CircuitPython to learn Python and hardware together, or even use Arduino IDE. Circuit Playground Express is the newest and best Circuit Playground board, with support for MakeCode, CircuitPython, and Arduino. It has a powerful processor, 10 NeoPixels, mini speaker, InfraRed receive and transmit, two buttons, a switch, 14 alligator clip pads, and lots of sensors: capacitive touch, IR proximity, temperature, light, motion and sound. A whole wide world of electronics and coding is waiting for you, and it fits in the palm of your hand.