Let the Sleepy Weepy Pillow lift your spirits and rock you gently to sleep. With its moisture sensor, it knows when you’ve been weeping. It does more than acknowledge your sadness, though, it will even buoy your spirits with the song or inspirational message of your choice. Using a recordable greeting card you can include your own soothing message or music, sure to make you feel a little better.
So buck up, buttercup. Choke down that last sob and warm up your soldering iron, it’s time to take matters into your own hands to make yourself feel better. It's time to make a pillow that knows when you're sad!
Step 1: Tools + materials
Step 2: Moisture sensor curcuit
After wiring all the components into a stripboard, leads were attached from the terminals of the greeting card to the relay and the stripboard circuit was attached to the back of the electronic greeting card.
Want the basics on electronics? Check out the Introduction to Electronics, specifically step #17-circuits.
Step 3: Moisture sensing matrix
For the inside of the pillow I wanted to create a matrix under the surface that would allow the circuit to be completed when moisture was present, but be unobstructive at all other times. For this, I cut my fine wire mesh fabric into long strips and sewed them into spaced rows. Make sure to cut your mesh fabric on the bias so that the edges don't fray. Alternating rows were connected together using the same mesh fabric. Your moisture matrix can be as large as you like, and even on both sides of your pillow. For this design I chose half the pillow's area on one side only.
Keep your multimeter on hand and test for conductivity. You do not want any frayed edges to complete the circuit without moisture. When your matrix is sewn in successfully another layer of fusible bonding matrix was added on top to keep the mesh fabric in place and prevent any false connectivity once the wiring is complete. Another scrap piece of cotton fabric was iron onto the fusible bonding matrix after. A small gap was left to allow the circuit wires to be hooked up to the moisture sensing matrix. Conductive fabric leads were covered in heat-shrink tubing and sewn from each side of the matrix. These leads will be joined with the moisture sensing probes on the circuit.
Step 4: Make letters + pillow
Scraps were laid out on fusible bonding matrix and ironed. Next the scraps were cut into the individual letters and then ironed onto the outer face of the pillow. Turn your pillow inside out and sew the pillow case, leaving a small opening. to allow you to turn the pillow right-side out again.
Step 5: Stuff
After the pillow has been stuffed and the circuit hooked up, place the circuit pouch inside and sew the pillow closed.
Step 6: Time to cry (or not)
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