
Here’s an interesting solar tree that collects energy during the day and emits pulses of lights at night.
Consumer, Cool, Design, DoItYourself!, Educational, Entertainment, Gadgets, LED, lights, Microcontroller, Projects, pulse frequency, pulses, solar energyCollects and stores solar energy during the day, emits controlled pulses of light at night. Pulse frequency: 0.2Hz
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frequency

Here’s an interesting fact about ringtones with higher frequencies. With these higher frequency “mosquito” ringtones, students or young people are able to set their cellphones to be only heard by people under a certain age! Now here’s a way kids can set their phone to be audible, but not audible to the teacher, provided he’s over 30.
audible range, Audio, cell phones, cellphones, certain age, Consumer, Cool, Educational, Entertainment, free mosquito ringtones, Gadgets, higher frequency, interesting fact, kids, mosquito, phone calls, text messagesThe short version, A tone outside the audible range of hearing for most people over the age of 30. This means that you can get phone calls and receive text messages in class or school without teachers hearing it.

Are you tired of bugs, insects, rats, and other rodents in your house?
It might be time for you to invest in an Ultrasonic Repellent. I’ve personally been using them for over 10 years and do recommend them over sprays and whatnot.
Here’s a commercial-grade ultrasonic repellent you can order that has variable frequency and settings.
10 years, bugs insects, Consumer, Cool, Gadgets, Household, rats, rodents, ultrasonic repellent, variable frequency, whatnot