SPECIFICATIONS

Application: Computer

Brand Name: NONE

Choice: yes

Condition: New

Dissipation Power: N/A

High-concerned chemical: none

Operating Temperature: N/A

Origin: Mainland China

Package: DIP

Quantity: 2

Supply Voltage: N/A

Type: Voltage Regulator

is_customized: Yes

semi_Choice: yes

The product is packaged by DS18B20 digital temperature sensor chip that can be networked. It has a wear-resistant touch, small size, easy to use, and various packaging forms. It is suitable for digital temperature measurement and control of various small space equipment.

Features:

With a unique single-wire interface, the connection between DS18B20 and the microprocessor requires only one port line to realize the two-way communication between the microprocessor and DS18B20.

Temperature range: -55 -125℃, the inherent temperature resolution is 0.5℃

Supports multi-point network function. Multiple DS18B20s can only be connected in parallel on three lines, up to 8 in parallel. If there are too many, the power supply voltage will be too low and the signal transmission will be unstable.

Working voltage: DC 3 -5V

No need for any external components in use

Measurement results are serially transmitted in 9 to 12 numbers

PVC cable direct socket or German spherical junction box socket for easy connection with other electrical equipment.

Application range: This product is suitable for temperature measurement and control fields such as cold storage, granary, storage tank, telecommunication room, power room, cable trough, etc.; temperature and control of small space industrial equipment such as bearings, cylinders, textile machinery, air conditioners, etc.; refrigerators, freezers and Low temperature drying oven, etc.; heating/cooling pipe heat measurement, central air conditioning thermal energy measurement and industrial temperature measurement and contrVibration switch module KY-002Hall magnetic sensor module KY-003Key switch module KY-004 applicable

Rating: 50mA 12VDC

2. Contact Resistance: 50mΩ max(initial)

3. Insulation Resistance: 100MΩ (minDC 250V)

4. Dielectric Strength: AC250V (50/60Hz for 1minute)

5. Electrical Life: 100,000cycles

6. Environment temperature: -25℃～+105℃

7. Operating Force: 180/230(±20gf)

8. Seal temperature: 250℃-280℃Infrared emission sensor module KY-005

Infrared emitting tubes are also called infrared emitting diodes, which belong to the category of diodes. It can directly convert electrical energy into near-infrared

Light-emitting devices that can radiate light (invisible light) are mainly used in various photoelectric switches and remote control transmitter circuits. The structure and principle of the infrared emitting tube are similar to those of ordinary light-emitting diodes, except that the semiconductor materials used are different. Infrared light-emitting diodes usually use gallium arsenide (GaAs), gallium aluminum arsenide (GaAlAs) and other materials, and are packaged in fully transparent or light blue, black resin.

The emission distance, emission angle (15 degrees, 30 degrees, 45 degrees, 60 degrees, 90 degrees, 120 degrees, 180 degrees), the intensity of the emitted light, and the wavelength. The above are physical parameters, and you need to understand its electrical performance parameters: commonly used in the market diameter 3mm, 5mm for low-power infrared emission tubes, 8mm, 10mm for medium power and high-power emission tubes. Low-power transmitter tube forward voltage: 1.1-1.5V, current 20ma, medium power is forward voltage: 1.4-1.65V 50-100ma, high-power transmitter tube is forward voltage: 1.5-1.9V200-350ma. Yuxing Electronics The 1-10W high-power infrared emitting tube can be used in infrared monitoring lighting.

Small passive buzzer module KY-006 applicable

18.7MM X 15.2MMLaser head sensor module KY-008

Working voltage: 5V

Specification: 15*24 mm

Light source wavelength: 650 nmLight Interruption Module KY-010

The light-interrupting module and digital 13 interface comes with LED to build a simple circuit to make a light-interrupting reminder light

Use the LED that comes with the digital 13 interface to connect the light-interruption sensor to the digital 3 interface. When the light-interruption sensor senses a key signal, the LED will be on, otherwise it will be off.

Two-color LED module 5MM KY-011KY-012

The structure principle of the buzzer

(1) Introduction of the buzzer

1. The function of the buzzer: the buzzer is an integrated structure of electronic signal buzzer, using DC power supply, widely used in computers, printers, copiers, alarms, electronic toys, automotive electronic equipment, telephones, timers, etc. Used as a sounding device in electronic products.

2. Buzzer classification: mainly divided into two types: piezoelectric buzzer and electromagnetic buzzer.

3. The circuit graphic symbol of the buzzer: the buzzer is represented by the letter "H" or "HA" in the circuit (the old standard uses "FM", "LB", "JD", etc.).

Schematic diagram of buzzer

(2) The structure principle of the buzzer

1. Piezoelectric buzzer: The piezoelectric buzzer is mainly composed of a multivibrator, a piezoelectric buzzer, an impedance matcher, a resonance box, and a shell. Some piezoelectric buzzers are also equipped with light-emitting diodes.

The multivibrator is composed of transistors or integrated circuits. When the power is turned on (1.5V-15V DC working voltage), the multivibrator starts to vibrate and outputs 1.5-2.5kHZ audio signals, and the impedance matcher pushes the piezoelectric buzzer to sound.

The piezoelectric buzzer is made of lead zirconate titanate or lead magnesium niobate piezoelectric ceramic material. Silver electrodes are plated on both sides of the ceramic sheet, and after polarization and aging treatment, they are then glued together with the brass sheet or the stainless steel sheet.

2. Electromagnetic buzzer: The electromagnetic buzzer is composed of oscillator, electromagnetic coil, magnet, vibrating diaphragm and shell.

After the power is turned on, the audio signal current generated by the oscillator passes through the electromagnetic coil, causing the electromagnetic coil to generate a magnetic field. The vibrating diaphragm periodically vibrates and produces sound under the interaction of the electromagnetic coil and the magnet.

(3) Making of the buzzer

(1) Preparation of electromagnet M: wind 100 turns of wire on an iron bolt with a length of about 6 cm, leaving 5 cm at the end of the wire as a lead, and stick the coil with transparent tape to prevent the coil from loosening, and then stick it with tape On a box, the electromagnet is ready.

(2) Preparation of shrapnel P: Cut a long iron piece with a width of about 2 cm from the iron can, bend it at a right angle, connect a lead of the electromagnet to the shrapnel, and then use tape to stick the shrapnel on the wooden board.

(3) Use a paper clip as the contact Q, put the paper clip up high with a book, glue it firmly with tape, and lead out a wire. Connect the circuit as shown in the figure.

(4) Adjust the distance between M and P (by moving the box), so that the electromagnet can attract the shrapnel, adjust the distance between the contacts and the shrapnel, so that they can just touch, and you can hear the buzzing sound after power on.

(4) Active buzzer and passive buzzer

teach you to distinguish between active buzzer and passive buzzer

A small buzzer currently on the market is widely used in various electrical equipment, electronic production, and single-chip circuits that require sound due to its small size (only llmm in diameter), light weight, low price, and reliable structure. .

From the appearance, the two buzzers seem to be the same, but if you look carefully, the height of the two is slightly different. The height of the active buzzer a is 9mm, and the height of the passive buzzer b is 8mm. For example, when the pins of the two types of buzzers are placed upwards, it can be seen that the one with a green circuit board is a passive buzzer, and the one without a circuit board and sealed with black glue is an active buzzer .

To judge the active buzzer and passive buzzer in one step, you can also use the multimeter resistance file Rxl file to test: connect the black test lead to the buzzer "+" pin, and the red test lead to touch back and forth on the other pin. If it triggers a clicking sound and the resistance is only 8Ω (or 16Ω), it is a passive buzzer; if it can emit a continuous sound and the resistance is more than a few hundred ohms, it is an active buzzer.

The active buzzer is directly connected to the rated power supply (the new buzzer is marked on the label) and it can sound continuously; while the passive buzzer is the same as the electromagnetic speaker and needs to be connected to the audio output circuit to sound .