The telephone is a communication device composed of a receiver, a microphone, an auxiliary switch, and a calling device. Today is the era of digital informationization, we often hear a lot of phone calls, but the general home phone does not have a non-disturbing device. That article will teach you a simple phone-free device design that can be successfully completed with just three components.
The device uses only three components: a 300Ω resistor, an LED, a bidirectional microswitch, and then connect them to the circuit of the drawing.
The production method first finds the positive and negative poles of the ringing output terminal, and can use the resistor series LED to test when the phone rings.
If the diode emits light, the anode of the diode is the anode of the output and the other end is the cathode. Then disconnect the positive end to the center of the bidirectional switch. The bidirectional switch has a series of resistors and LEDs, and the other is connected to the original circuit. Find the right place and fix the components with hot melt adhesive.
The bidirectional switch is connected to the output of the ringing circuit as shown in the figure, and the switch center point (knife) is connected to the speaker (buzzer) during the day. The phone rings normally. At night, turn the center point of the bidirectional switch to disconnect from the original circuit, turn on the resistor and the LED, and when there is a call, the diode will emit light and will not ring, which will prevent the interference.
Medical protective clothing refers to the protective clothing used by medical personnel (doctors, nurses, public health personnel, cleaners, etc.) and people entering a specific health areas (such as patients, hospital visitors, persons entering the infected area, etc.).
Product advantage:
Breathable, comfortable and antistaticPrevent virus invasion,Good filtration efficiency
Light and soft, Comfortable and durable
Good fire resistance, Scratch resistant,durable and tear resistant
EN14126; ISO EN13485;
protective clothing for covid, protective clothing for mold removal, protective clothing medical, protective clothing amazon, protective clothing and equipment
Jiangmen soundrace electronics and technology co.,ltd. , https://www.soundracegroup.com