Cabe easter egg trace small.jpg

 

I am smitten with the idea of the beeping Easter Egg for visually impaired kids - see this post for more.

 

Despite digging around, I couldn't find any designs or diagrams for their egg. So, I designed my own.

 

Originally I thought of using a Raspberry Pi Zero, but later realized it was over the top for what's necessary. … plenty can still be made without a microcontroller. This beeping Easter Egg uses the age old 555 timer. (For those who may attempt to make one too, the 10K resistor with the star around it sets the time between beeps.)

 

Above is the “schematic.”

 

UPDATE: (3/26/2016) Couldn't build the circuit... only 555s I had were burnt out. Radioshack doesn't carry components anymore. So sad...

 

UPDATE 2: The drawing above would place the beeps out a little awkward. Try changing both resistors to 10K. Based off this site - Astable 555 Square Wave Calculator

 

UPDATE 3: I finally built the project. My original 555 time was indeed broken. Swapped out, worked perfectly! See the build here: [DIY Project] Build a Chirping Easter Egg - part 2

 

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