Blind vision aid circuit

On the surface, when the light intensity changes, the oscillation frequency of the amplifier output also changes. The blind person can perceive the corresponding change of the external light intensity by the change of the acoustic frequency through the earphone. C: 0.47 UF, E: 3V.

This article refers to the address: http://

This type of visual aid can be made very small, typically up to 1 inch by 3/8 inch. The volume is not large, but it can be heard with headphones.


- Multiple USB Charger Extension Socket provide quick charging for your mobile electronic devices.

- Smart Charging: 5V 2.4A/3.4A/4.2A/4.8A/6A Usb Ports Extension Cord support smart charging. Protect your devices from over charging damage.

- Multiple Outlets Power Strip With Usb Ports allowing you to plug in various electronics and electrical devices.

- PC/ABS flame retardant housing, phosphor bronze+pure copper high conductivity Power Strip Usb .

-- Qualified Power Cord Receptacle Extension With Usb allowing you extend the outlet 6 feet (2 meters) away from the wall or even further with long power strip.


Power Strip With Usb

Power Strip With Usb,Power Strip With Usb Ports,Usb Ports Extension Cord,Power Strip Usb,Receptacle Extension With Usb,USB Charger Extension Socket

ZhongShan JITONGLONG Plastic Hardware Co. Ltd. , https://www.toukoo-electronics.com