For Fun, C.O.B. Project Kits
C.O.B. means "Chip on Board"; and most of the electronics is inside a tiny, application-specific chip, (integrated circuit), on a PC board. These circuits are fun but wonft be much of a challenge or education as they are so simple; you add a battery and the circuit is ready to go.
No. 80-910 - Four Train Sound Effect. Ideal for model railroads; produces the whistle, train chugging sound, crossing bell and the eclickety-clack of crossing a bridge.
YDI Price $12.90
No. 80-920 - Cellular Phone Sound Effects. Good for a kids toy; imitates the cellular phone sounds perfectly.
YDI Price $9.90
No. 80-930 - Assorted Melodies. Great for kids! Sixteen melodies such as: "Farmer in the Dell", "Hush Baby", "Home on the Range" and other familiar tunes.
YDI Price $9.90
No. 80-940 - Ambulance, Fire and Police Sounds. Sirens and machine guns and more; great for kids toy!
YDI Price $12.90
No. 80-950 - Happy Birthday on a Chip. A great item to hide in a package, plays happy birthday repeatedly.
YDI Price $4.90
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