Build your own ultrasonic audio laser, otherwise known as an ultrasonic parametric speaker that lets you beam sound to distant places like a laser beam. Total cost is under $20!

Parts List:
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(17) TCT-16T 40Khz Ultrasonic Transducers TCT40-16T - https://www.aliexpress.com/item/32258...
(1) STM32F103C8T6https://www.aliexpress.com/item/32862...
(1) LM358 (DIP-8) - https://www.aliexpress.com/item/32972...
(1) TC4427A - https://www.aliexpress.com/item/32967...
(1) PJ-307 Line-in Audio Jack - https://www.aliexpress.com/item/10000...
(1) MT3608 DC Step-Up Module (optional) - -https://www.aliexpress.com/item/40001...

Code and schematics:
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https://github.com/gururise/direction...

0:00 - 0:56 Intro
0:57 - 2:51 History
2:52 - 5:05 Implementation
5:06 - 10:26 Part Details
10:27 - 10:57 Circuit
10:58 - 12:57 Usage
12:59 - 13:53 Conclusion

#parametricspeaker #ultrasound #audiolaser