You know you have to drive a low-impedance speaker. The shush circuit block diagram uses many analog principles to output a shushing noise when the microphone picks up any loud voices.Īs Professor McLaughlin taught us back at GMI, sometimes it’s easier to understand a schematic looking from the output back to the input (Fig. The fact that Radio Shack went bankrupt may create some sourcing issues in high-volume production, so be careful.ġ. A Radio Shack microphone senses ambient noise, while a complementary transistor unity-gain buffer outputs the audio to a Radio Shack speaker. The block diagram of the circuit has the same input and output as Bob Pease’s circuit (Fig. So rather than a sampled-data playback, I thought it would be more fun to fabricate the shushing noise, like an old analog musical synthesizer. It’s almost like you have to do programming. I thought this was a bit too boring of a design.
You could just record someone, perhaps a friendly librarian, saying “shush,” and then use a threshold circuit to trigger the playback. I thought about using one of those recording chips like in greeting cards. I expect it will be wildly popular with librarians, as well as anti-social engineers.Īs much as I like analog, a circuit that detects a threshold and then creates an event seemed to suggest at least a semi-digital solution. After getting familiar with that circuit, I thought about a similar one that would make a shushing noise when people would talk loudly. Bob adapted it from a Bob Widlar circuit that would sense someone talking loudly in his office and then emit a shrill hissing noise. Please note: Original packaging is inclusive of ALL packaging, including the bag that the clip is packed in.A while back, I did an article about Bob Pease’s “hassler” circuit. If you have received this item & have not opened it & wish to return it in it’s beautiful original packaging within 30 days of the date of purchase, we will happily refund or provide a store credit upon the items return, however, this will need to be done at your (the customers) expense.If you believe your product to be faulty, please contact us through our returns page so we can assess the issue at hand so long as this is within our 6 month warranty period.If you have plugged your shoosher into the wall to be charged & flicked the power point on, that means it has been used therefore we cannot accept it as a return return due to us being unable to review the quality of your electrical fittings/power circuits.We do not accept change of mind returns if you do not ‘like’ our product.Hot Tip: If you are taking our shoosher out on a bumpy pram ride, please attach it to the pram handle to ensure the device does not get damaged.Please do not rotate the top or bottom past the last soundtrack or past min/max volume as the machine cannot handle this pressure & the electrics can come loose.Although it is portable, it is not a toy and it is not built to be thrown or dropped. Please note: This shoosher is a beautiful machine that needs to be treated with love & respect, much like all other electrical devices.
SHUSH WHITE NOISE MANUAL
Handy little clip to attach to pram/car seat/cot.Voice activation function (switch right) – this automatically enters sleep mode after 30mins and will switch back on when baby starts to cry.All new continuous play (switch left) – to ensure baby has beautiful sounds playing for the duration of their sleep.Easily adjustable volume via the twist top speaker.
SHUSH WHITE NOISE PORTABLE
Our amazing portable sound machine is perfect for white noise & lullabies on-the-go! This is our new model with added incredible continuous play function to ensure bubs has beautiful sounds playing for the duration of their sleep.
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