sound board

I need a circuit that turns on an LED and plays a sound repeatedly when a button is pressed, and stops the sound and light as soon as the button is released. It needs to be battery operated, preferably by coin or button batteries. The issue is that I need it to be very small (1.5cm x 2.5cm)...

Hi guys! So, my kid has this "Animals Sounds Book" which is broken and doesn't produce any sound now, although the batteries are good. I've attached two images showing the COB circuit, but I'm beginner and I don't know how to trigger these metal strips to test the output? Also, any general...

Hello! I recently built a scale model of the Jurassic Park Entrance gates but when I was getting ready to finally be done with it I had the thought I could add a servo or two in order to make the doors automatic. In researching this I decided, well, why don't I add a soundboard and some mini...