The sound-activated LED light-emitting glasses kit, high welding success rate, simple principle. The glasses control the LED flashing through voice or music, the louder the sound, the more obvious the LED flashing effect. There are mesh holes on the board so that the outside can be easily seen from the inside. Moreover, the LED on the circuit board emits light outward, does not irradiate the eyes, has no effect on vision at all, and the sensitivity is adjustable. Widely used in schools to help students learn basic mechanical and electronic skills, but also suitable for electronics enthusiasts.
Product parameters:
Product name: Sound-activated LED lighting glasses kit
Power supply mode: 2 23A batteries (need to be purchased separately)
Product model: CAI-218
Working voltage: 12V
Delivery method: Parts delivery
Working current: 15mA
Shell material: transparent ABS
Number of lamp beads: 50
Product net weight: 70g
Luminous color: emerald green
Features:
1. Transparent shell, mesh design, one-way light.
2. The circuit board has mesh holes, which can be seen from the internal test.
3. The LED on the circuit board shines outward, and the light flashes from the middle to both sides, which is safe and practical.
4. The sensitivity is adjustable, if you find that your light-up glasses do not respond to the sound, please try to adjust the button.
Circuit Description:
KA2284 is an integrated circuit used for 5-point LED level indication. It can output different lighting states of 5 LEDs by inputting different high and low voltages, and the LEDs will be lit and extinguished in sequence. The number of LED lights is often used to indicate the output of the power amplifier or the size of the ambient sound, that is, the louder the sound, the more LEDs are lit, and the lower the sound, the fewer LEDs are lit. This circuit is composed of a triode amplifier circuit and a level indicating circuit. The microphone sends the received sound to the triode Q1 through C3 for amplification, and then sends it to the signal input terminal (8 pins) of KA2284. KA2284 drives 5 groups of LEDs to display on and off. . The power supply of the circuit is 12V, R1-R5 are the current limiting resistors of the light-emitting diodes, and every 5 light-emitting diodes are connected in series. The left and right sides of the glasses are 5 groups of light-emitting diodes corresponding to the mirror image. Adjusting RP1 can adjust the sound sensing sensitivity.
Reviews
There are no reviews yet.