TouchTone 4029 DIY Kit

Marsoni

M251S

$89.00

Get it in 3 business days with 1 day shipping. Friday, May 29

TouchTone 4029 DIY KitTouchDescription: TouchTone is a feedback amplifier system using all six inverters (inverting amplifiers) of a CMOS 4049 chip. Use the inverters in combined digital analog mode. Two pairs are used as variable frequency oscillators (lower and high frequencies) and third pair is used in mixed amplifying filtering oscillating (feedback) mode to play around with the existing pads all over the system. Combining touchable pads in various manners can bring

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Our dogs are loving this ball. Our 1 yr old hound is a world-class chewer and he can't make a dent in this ball. The interactive buzzing and bouncing keeps them entertained for long durations. It's a mite noisy but the barking from the 1 yr old is much louder, lol. Even turned off, they like playing with it and chewing on it. Based on the tough construction, we think it will last much longer than traditional chew balls.

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Reviewed in the United States on March 22, 2026