Üzleti, irodai és ipari

 
Features:
 
This product is a booster coil production suite, the circuit is simple and reliable, with a professional line drawings, electronic research convenience enthusiasts
 
Uses: high school science experiment, electronic equipment, negative ion generator, scientific small production. This circuit is generated when the stable high frequency arc, high temperature, can easily ignite combustible materials, so it was called the plasma lighters
 
 
Parameter:
 
15KV transformer outside dimensions of approximately: 27×16×21mm
Input voltage: DC 3.7V-4.2V (limit 12v, easy to damage not recommended, this transformer is equally applicable to 12V input voltage, but requires a corresponding increase in the base of the feedback resistor to about 150 ~ 1.5K, its resistance should be large to replace a small adjustment, or burned transistor or transformer)
Input Current: <2A
Output voltage: approximately 15KV (please pay attention to safety when used)
Output Current: 0.4A
High voltage bipolar ignition distance: 0.5 cm
 
When the product input termination 3.7V-4.2V power supply, the secondary high voltage output is not connected to high-voltage rectifier diodes and capacitors, output terminals levels 1.5cm long can produce purple high temperature arc, no crackling, but the temperature is very high , you can easily and instantly point cigarette paper, or even very thin wire burned Sparks (such as junior high school chemistry experiment thin wire in oxygen combustion scene, but not as good as oxygen so intense.)
 
 
Transformer structure:
 
There are two primary windings, a primary winding, a feedback winding, the secondary output of high pressure. Other: 15KV transformer designed for maximum output, limit output can not exceed 15KV, is one centimeter arc, a higher output voltage is likely to damage the transformer.
 
 
PCB board size: 4.2CM * 3.2CM * 0.16CM;
 

Battery Shield V1.1.0 For D1 mini single lithium battery charging and boost

8406 PAM8406 No interference stereo class D audio power amplifier module development board
 
 
 

 

For microcontrollers without an analog-to-digital converter or when you want a higher-precision ADC, the ADS1015 provides 12-bit precision at 3300 samples/second over I2C. The chip can be configured as 4 single-ended input channels, or two differential channels. As a nice bonus, it even includes a programmable gain amplifier, up to x16, to help boost up smaller single/differential signals to the full range. We like this ADC because it can run from 2V to 5V power/logic, can measure a large range of signals and its super easy to use. It is a great general purpose 12 bit converter.
The chip's fairly small so it comes on a breakout board with ferrites to keep the AVDD and AGND quiet. Interfacing is done via I2C. The address can be changed to one of four options (see the datasheet table 5) so you can have up to 4 ADS1015's connected on a single 2-wire I2C bus for 16 single ended inputs.

(Specification of TACT switch Series)
Temperature: -25 ° ~ -85 ° C
Rated Load: DC12V 0.1A
Contact Resistance: <= 0.03Ω
Withstand Voltage: AC250 V (50Hz) / MIN
Actuation Force: 1.3 -0.5N
Lnsulation Resistance:> = 100MΩ
Life: 100000 times (times)
Package Included:
100 x Switches

 
 
GY-50 L3G4200D 3 Axis Digital Gyroscope Sensor Module Angular Velocity Module
Description:
High quality Immersion Gold pcb, machine welding process, quality assurance
Name the: L3G4200D modules (three-axis gyroscope module)
Using the chip: L3G4200D
Power supply :3-5v
Means of communication: IIC / SPI communication protocol
Measuring range: 250/500/2000 dps 
 
Package Included:
1 * GY-50 3 Axis Digital Gyroscope Sensor Module

Feature
100%  Brand new and high quality
Brand new compatible passive speaker buzzer module
Features control the buzzer sounds
Compatible and mini design
Made of PCB material
DIY parts
Color: black
Size:26 x 15 x 10mm
 

SHT30 SHT30-D Temperature Humidity Sensor Breakout Weather

 
 
 
 
 
 
 
 
 
 
 

RS485 module, RS485 module turn TTL ,With isolation single-chip microcomputer UART serial port
 
 
TTL to RS485 module 
Module highlights:
(1) 3.3V and 5.0V power perfect compatibility
(2) 3.3V and 5.0V signal perfect compatibility
(3) the absolute adopts imported chip, industrial design, strong anti-interference ability, at the same time, adopt more effective lightning protection design, 485 can be used in industrial field and field under the harsh environment, the working temperature of 40  to 85 , the transmission distance of km (with 850 m 2 * 1.5 cable testing, suggest use within 800 meters, more than 800 meters please add repeater)
(4) the half hole process design, plate thickness 0.8mm, can be easily as composite plate, can also be used for welding terminal
(5) has the RXD, TXD signal indicator lights, send and receive status panoramic view
The module features:
(1)This module fully considered485BusLightning protection designAnti interference Design When the long-distance transmission in the field, the "Earth" of the module is connected to the earth, which can play a very good role in anti interference and lightning protection.485Bus is more secure; indoor short distance transmission can not access the earth.
(2) with a standard2.54Spacing design to facilitate your two development
(3Have 120Ou matching resistance, short connectR0Can match the resistance, long distance transmission is recommended.
(4Support multi machine communication, allowing access to the most 128A device on the bus
(5This module can be hot plug, no other 485Chip hot swap signal plug phenomenon
(6Large area laying copper, preventing signal interference
 

esp-wroom-02 Pocket 8266 D1 mini WIFI Module --ESP8266 18650 Battery

The main chip adopts a dual-core 32-bit CPU with low power consumption, with the main frequency up to 240MHz and the computing power up to 600DMIPS
Default is 32Mbit SPI Flash, 520KB SRAM
SoftAP and Station modes are supported
802.11b/g/n wi-fi BT/BLE SoC module with super small volume
Support the UART/SPI, I2C/I2S/PWM/ADC, DAC and so on
Firmware upgrade support (FOTA)
Antenna supports onboard antenna or IPEX seat output

 
 
 
 
 
 
 
 

 
 
 
 
 
 
 
 

 
 
 
 
 
 
 
 

 
 
 
 
 
 
 
 

 
 
 
 
 
 
 
 

 
 
 
 
 
 
 
 

 
 
 
 
 
 
 
 

D1 mini ESP32 ESP-32 WiFi Bluetooth Internet of Things development board based ESP8266 Fully functional

Product Discription: 
1. Volume: 23 * 24MM weight:0.45 g 
2. Excellent noise suppression. in the absence of contact input audio, you will not hear any noise even put your ear close to the speaker 
3. The two-channel stereo, 5V power supply can output 5W 5W power, directly drive 4, 8 speakers, output power, full of energy, good sound quality, with left and right channel volume adjustment. 
4.unique non-LC filter Class-D digital power board, it can be used directly for the USB-powered from computers. 
5. dual-panel wiring and proper solution to potential balance and channel crosstalk caused by the wiring between 
6. ultra-miniature design, it can easily be placed in a small space inside a variety of digital products, high amplification efficiency. 
7. Solder by machine 
8. The rated working voltage 2.5-5V, limit operating voltage 5.5V
 
 

UNO WiFi R3 ATmega328P ESP8266 (32Mb memory), USB-TTL CH340G. Compatible for Arduino Uno, NodeMCU, WeMos ESP8266
 

UNO WiFi R3 ATmega328P ESP8266 (32Mb memory), USB-TTL CH340G. Compatible for Arduino Uno, NodeMCU, WeMos ESP8266
 

100% brand new and high quality
Quantity:1set
Weight:23 g
Color: as picture show
Size:37mmx41mm/1.46"x1.41"(inch) (approx)
The working voltage: DC 3 ~ 5V
Loudspeaker: 8, 0.5W
 
Features:
1.An easy to use 10 seconds of voice recording
2.high-quality, natural voice restored
3.can be used as propaganda module
4.with looping, jog playback, single-pass play function
5.available single-chip control
6.this module can directly drive a small speaker 8 ohm 0.5W

100% brand new and high quality
Quantity:1set
Weight:23 g
Color: as picture show
Size:37mmx41mm/1.46"x1.41"(inch) (approx)
The working voltage: DC 3 ~ 5V
Loudspeaker: 8, 0.5W
 
Features:
1.An easy to use 10 seconds of voice recording
2.high-quality, natural voice restored
3.can be used as propaganda module
4.with looping, jog playback, single-pass play function
5.available single-chip control
6.this module can directly drive a small speaker 8 ohm 0.5W

100% brand new and high quality
Quantity:1set
Weight:23 g
Color: as picture show
Size:37mmx41mm/1.46"x1.41"(inch) (approx)
The working voltage: DC 3 ~ 5V
Loudspeaker: 8, 0.5W
 
Features:
1.An easy to use 10 seconds of voice recording
2.high-quality, natural voice restored
3.can be used as propaganda module
4.with looping, jog playback, single-pass play function
5.available single-chip control
6.this module can directly drive a small speaker 8 ohm 0.5W

 
 
 
 

 
Tracking info of  China Post Ordinary Small Packet Plus can be check here : www.17track.net/en 

 
25 type x 10pcs
1p 5p 6p 10p 15p 20p 22p 30p 33p 47p 68p 100p(101) 221 331 471 681 102(1nf) 222 332 472 103(10nf) 223 333 473 104 
 
 

 
Tracking info of  China Post Ordinary Small Packet Plus can be check here : www.17track.net/en 
 
 

Features: 
DC power supply filter board Digital power amplifier interference suppression board Automotive power supply EMI suppression, current 4A, can meet
The current of the TPA3116 machine makes the power input more pure, so the amplifier is less noisy.
low voltage DC (0V~50V)
Terminal description:
  Vin : input positive end
Vin-: input negative
Vout : output positive end
Vout-: negative output
Package Contents 
100% Brand New

Model: JDY-30 module = JDY-31 The same use.
Support Bluetooth SPP protocol, the transmission speed of up to dozens of K per second
 
 
Applications:
 
1: Bluetooth printer
2: Bluetooth POS machine
3: intelligent home control
4: Bluetooth wireless data transmission
JDY-30 manual download address: https: //pan.baidu.com/s/1jIBSbD8
Advantages: Replace all Bluetooth 3.0 and 2.0 serial communication modules on the market
 
 
 
Features:
Bluetooth V3.0 EDR
Bluetooth Class 2
Built-in PCB radio frequency antenna
Support UART interface
3.3V power supply
Operating Frequency Band:2.4GHz -2.48GHz unlicensed ISM band 
Bluetooth Specification: V2.1 EDR 
Host Interface: UART 
 

Model: JDY-30 module = JDY-31 The same use.
Support Bluetooth SPP protocol, the transmission speed of up to dozens of K per second
 
 
Applications:
 
1: Bluetooth printer
2: Bluetooth POS machine
3: intelligent home control
4: Bluetooth wireless data transmission
JDY-30 manual download address: https: //pan.baidu.com/s/1jIBSbD8
Advantages: Replace all Bluetooth 3.0 and 2.0 serial communication modules on the market
 
 
 
Features:
Bluetooth V3.0 EDR
Bluetooth Class 2
Built-in PCB radio frequency antenna
Support UART interface
3.3V power supply
Operating Frequency Band:2.4GHz -2.48GHz unlicensed ISM band 
Bluetooth Specification: V2.1 EDR 
Host Interface: UART 
 

LM358N Linear - Amplifiers - Instrumentation, OP Amps, Buffer Amps , IC OPAMP GP 1.1MHZ 8DIP
 

Description:
LC SX1308 booster module carrying SX1308 chip, its packagnig is small, and high efficiency. The output power can be adjust, maximum can arrive 28V and its interior integrate the lowest RDS internal resistance 100mΩ metal oxide semiconductor field effect transistor (mosfet), which can realize large current output of up to 2A. It widely used in 3G network products, digital products, mobile power supply,battery power supply, equipment, etc.
 
Features:
Oscillation frequency 1.2MHz
efficiency is as high as 95%
Circuit has short circuit protection, overheating protection function
10k to adjust potentiometer, adjust the output voltage
 
Parameters:
Maximum input voltage: DC 2-24V
Maximum output voltage: DC 2-28V
Switching frequency: 1.2MHz
Maximum current output: 2A
 
 
 

M3 10MM Height Hollow Copper Pillars

Data download: https://pan.baidu.com/s/1gCaxa2mvvj956MqE3lN2wg
 
Product description:
The MAX30100/MAX30102 is an integrated pulse oximeter and heart rate monitor biosensor module. It integrates a red LED and an infrared LED, photodetectors, optical devices, and low-noise electronic circuits with ambient light suppression. The MAX30102 USES a 1.8v power supply and an independent 5.0v power supply for internal LED, which is applied to wearable devices for heart rate and blood oxygen collection and detection, and is worn on fingers, earlobes and wrists. The standard 12c-compatible communication interface is high to transmit the collected values to Arduino,KL25Z and other SCM for heart rate and blood oxygen calculation. In addition, the chip can also be closed by the software module, standby current is close to zero, the power supply to maintain the state of supply. Because of its excellent performance, the chip is widely used in samsung Galaxy S7 phones. Compared with the previous generation product MAX30100, the MAX30102 integrated glass cover can effectively eliminate the external and internal light interference, has the optimal and reliable performance.
The heart rate blood oxygen sensor module is a biosensor module made according to the power requirements of MAX30100/MAX30102. Its 12C communication interface voltage is compatible with 1.8v /5V, and can be developed with conventional MCU board
KL25Z, stm32, etc. In addition, it also provides the corresponding heart rate and blood oxygen program, which can be easily used to complete the monitoring of heart rate and blood oxygen concentration in cooperation with a variety of development boards. It is suitable for scientific research and teaching demonstration on heart rate and blood oxygen, and is also very suitable for secondary development.
Module parameters:
Circuit board size: 1520mm
Circuit board thickness: 2.5mm
Module function: measure heart rate, measure blood oxygen concentration, measure temperature supply voltage: 1.8v-5v
Detection signal type: light reflection signal (PPG)
Output signal interface: 12C interface
Communication interface level: 1.8/3.3v optional
Peak wavelength of red LED: 650nm-670nm
Peak wavelength of infrared LED: 870nm-900nm
Interface description:
VIN: power inlet, 1.8v-5v
SCL: clock of 12C bus
SDA: 12C bus data
INT: interrupt pin
RD: output 2.8v, drive infrared LED
RD: output 2.6v, drive red LED
GND: grounding
Principle description:
There are three traditional methods of pulse measurement: one is the extraction of ecg signals; Second, the pulse rate is calculated from the fluctuation measured by the pressure sensor during the measurement of blood pressure. Third, the light volume method. The first two methods of extracting signals restrict the patient's movement, and if used for a long time, it will increase the patient's physical and psychological discomfort. As one of the most common measurement methods in monitoring measurement, the optical volume pulse measurement has the characteristics of simple method, convenient to wear and high reliability.
The basic principle of light volume method is to measure pulse and blood oxygen saturation by using different light transmittance caused by vascular pulsation of human tissues. Secure to client's finger, wrist, or earlobe by bandage or clip. When measuring blood oxygen saturation, according to the oxygen hemoglobin (Hb02) and hemoglobin (Hb) to infrared light, infrared light absorption to calculate. Blood vessels dilate and contract with the heartbeat, when diastolic blood volume, absorption of red and infrared light more, when systolic, blood volume less, absorption of red and infrared light less. Heart rates can be calculated based on periodic changes in the amount of light reflected to the sensor. Formula for calculating blood oxygen saturation
Directions for use
The module's 12C communication interface is compatible with 1.8v /5V and can communicate with most conventional development boards.
The 1.8v /5V level can be selected by the solder joint on the module. As shown in the figure below, the middle of the solder joint is the common point and the two sides are the selected level connection points. The product is connected to 3.3v by default

Data download: https://pan.baidu.com/s/1gCaxa2mvvj956MqE3lN2wg
 
Product description:
The MAX30100/MAX30102 is an integrated pulse oximeter and heart rate monitor biosensor module. It integrates a red LED and an infrared LED, photodetectors, optical devices, and low-noise electronic circuits with ambient light suppression. The MAX30102 USES a 1.8v power supply and an independent 5.0v power supply for internal LED, which is applied to wearable devices for heart rate and blood oxygen collection and detection, and is worn on fingers, earlobes and wrists. The standard 12c-compatible communication interface is high to transmit the collected values to Arduino,KL25Z and other SCM for heart rate and blood oxygen calculation. In addition, the chip can also be closed by the software module, standby current is close to zero, the power supply to maintain the state of supply. Because of its excellent performance, the chip is widely used in samsung Galaxy S7 phones. Compared with the previous generation product MAX30100, the MAX30102 integrated glass cover can effectively eliminate the external and internal light interference, has the optimal and reliable performance.
The heart rate blood oxygen sensor module is a biosensor module made according to the power requirements of MAX30100/MAX30102. Its 12C communication interface voltage is compatible with 1.8v /5V, and can be developed with conventional MCU board
KL25Z, stm32, etc. In addition, it also provides the corresponding heart rate and blood oxygen program, which can be easily used to complete the monitoring of heart rate and blood oxygen concentration in cooperation with a variety of development boards. It is suitable for scientific research and teaching demonstration on heart rate and blood oxygen, and is also very suitable for secondary development.
Module parameters:
Circuit board size: 1520mm
Circuit board thickness: 2.5mm
Module function: measure heart rate, measure blood oxygen concentration, measure temperature supply voltage: 1.8v-5v
Detection signal type: light reflection signal (PPG)
Output signal interface: 12C interface
Communication interface level: 1.8/3.3v optional
Peak wavelength of red LED: 650nm-670nm
Peak wavelength of infrared LED: 870nm-900nm
Interface description:
VIN: power inlet, 1.8v-5v
SCL: clock of 12C bus
SDA: 12C bus data
INT: interrupt pin
RD: output 2.8v, drive infrared LED
RD: output 2.6v, drive red LED
GND: grounding
Principle description:
There are three traditional methods of pulse measurement: one is the extraction of ecg signals; Second, the pulse rate is calculated from the fluctuation measured by the pressure sensor during the measurement of blood pressure. Third, the light volume method. The first two methods of extracting signals restrict the patient's movement, and if used for a long time, it will increase the patient's physical and psychological discomfort. As one of the most common measurement methods in monitoring measurement, the optical volume pulse measurement has the characteristics of simple method, convenient to wear and high reliability.
The basic principle of light volume method is to measure pulse and blood oxygen saturation by using different light transmittance caused by vascular pulsation of human tissues. Secure to client's finger, wrist, or earlobe by bandage or clip. When measuring blood oxygen saturation, according to the oxygen hemoglobin (Hb02) and hemoglobin (Hb) to infrared light, infrared light absorption to calculate. Blood vessels dilate and contract with the heartbeat, when diastolic blood volume, absorption of red and infrared light more, when systolic, blood volume less, absorption of red and infrared light less. Heart rates can be calculated based on periodic changes in the amount of light reflected to the sensor. Formula for calculating blood oxygen saturation
Directions for use
The module's 12C communication interface is compatible with 1.8v /5V and can communicate with most conventional development boards.
The 1.8v /5V level can be selected by the solder joint on the module. As shown in the figure below, the middle of the solder joint is the common point and the two sides are the selected level connection points. The product is connected to 3.3v by default

Data download: https://pan.baidu.com/s/1gCaxa2mvvj956MqE3lN2wg
 
Product description:
The MAX30100/MAX30102 is an integrated pulse oximeter and heart rate monitor biosensor module. It integrates a red LED and an infrared LED, photodetectors, optical devices, and low-noise electronic circuits with ambient light suppression. The MAX30102 USES a 1.8v power supply and an independent 5.0v power supply for internal LED, which is applied to wearable devices for heart rate and blood oxygen collection and detection, and is worn on fingers, earlobes and wrists. The standard 12c-compatible communication interface is high to transmit the collected values to Arduino,KL25Z and other SCM for heart rate and blood oxygen calculation. In addition, the chip can also be closed by the software module, standby current is close to zero, the power supply to maintain the state of supply. Because of its excellent performance, the chip is widely used in samsung Galaxy S7 phones. Compared with the previous generation product MAX30100, the MAX30102 integrated glass cover can effectively eliminate the external and internal light interference, has the optimal and reliable performance.
The heart rate blood oxygen sensor module is a biosensor module made according to the power requirements of MAX30100/MAX30102. Its 12C communication interface voltage is compatible with 1.8v /5V, and can be developed with conventional MCU board
KL25Z, stm32, etc. In addition, it also provides the corresponding heart rate and blood oxygen program, which can be easily used to complete the monitoring of heart rate and blood oxygen concentration in cooperation with a variety of development boards. It is suitable for scientific research and teaching demonstration on heart rate and blood oxygen, and is also very suitable for secondary development.
Module parameters:
Circuit board size: 1520mm
Circuit board thickness: 2.5mm
Module function: measure heart rate, measure blood oxygen concentration, measure temperature supply voltage: 1.8v-5v
Detection signal type: light reflection signal (PPG)
Output signal interface: 12C interface
Communication interface level: 1.8/3.3v optional
Peak wavelength of red LED: 650nm-670nm
Peak wavelength of infrared LED: 870nm-900nm
Interface description:
VIN: power inlet, 1.8v-5v
SCL: clock of 12C bus
SDA: 12C bus data
INT: interrupt pin
RD: output 2.8v, drive infrared LED
RD: output 2.6v, drive red LED
GND: grounding
Principle description:
There are three traditional methods of pulse measurement: one is the extraction of ecg signals; Second, the pulse rate is calculated from the fluctuation measured by the pressure sensor during the measurement of blood pressure. Third, the light volume method. The first two methods of extracting signals restrict the patient's movement, and if used for a long time, it will increase the patient's physical and psychological discomfort. As one of the most common measurement methods in monitoring measurement, the optical volume pulse measurement has the characteristics of simple method, convenient to wear and high reliability.
The basic principle of light volume method is to measure pulse and blood oxygen saturation by using different light transmittance caused by vascular pulsation of human tissues. Secure to client's finger, wrist, or earlobe by bandage or clip. When measuring blood oxygen saturation, according to the oxygen hemoglobin (Hb02) and hemoglobin (Hb) to infrared light, infrared light absorption to calculate. Blood vessels dilate and contract with the heartbeat, when diastolic blood volume, absorption of red and infrared light more, when systolic, blood volume less, absorption of red and infrared light less. Heart rates can be calculated based on periodic changes in the amount of light reflected to the sensor. Formula for calculating blood oxygen saturation
Directions for use
The module's 12C communication interface is compatible with 1.8v /5V and can communicate with most conventional development boards.
The 1.8v /5V level can be selected by the solder joint on the module. As shown in the figure below, the middle of the solder joint is the common point and the two sides are the selected level connection points. The product is connected to 3.3v by default

Data download: https://pan.baidu.com/s/1gCaxa2mvvj956MqE3lN2wg
 
Product description:
The MAX30100/MAX30102 is an integrated pulse oximeter and heart rate monitor biosensor module. It integrates a red LED and an infrared LED, photodetectors, optical devices, and low-noise electronic circuits with ambient light suppression. The MAX30102 USES a 1.8v power supply and an independent 5.0v power supply for internal LED, which is applied to wearable devices for heart rate and blood oxygen collection and detection, and is worn on fingers, earlobes and wrists. The standard 12c-compatible communication interface is high to transmit the collected values to Arduino,KL25Z and other SCM for heart rate and blood oxygen calculation. In addition, the chip can also be closed by the software module, standby current is close to zero, the power supply to maintain the state of supply. Because of its excellent performance, the chip is widely used in samsung Galaxy S7 phones. Compared with the previous generation product MAX30100, the MAX30102 integrated glass cover can effectively eliminate the external and internal light interference, has the optimal and reliable performance.
The heart rate blood oxygen sensor module is a biosensor module made according to the power requirements of MAX30100/MAX30102. Its 12C communication interface voltage is compatible with 1.8v /5V, and can be developed with conventional MCU board
KL25Z, stm32, etc. In addition, it also provides the corresponding heart rate and blood oxygen program, which can be easily used to complete the monitoring of heart rate and blood oxygen concentration in cooperation with a variety of development boards. It is suitable for scientific research and teaching demonstration on heart rate and blood oxygen, and is also very suitable for secondary development.
Module parameters:
Circuit board size: 1520mm
Circuit board thickness: 2.5mm
Module function: measure heart rate, measure blood oxygen concentration, measure temperature supply voltage: 1.8v-5v
Detection signal type: light reflection signal (PPG)
Output signal interface: 12C interface
Communication interface level: 1.8/3.3v optional
Peak wavelength of red LED: 650nm-670nm
Peak wavelength of infrared LED: 870nm-900nm
Interface description:
VIN: power inlet, 1.8v-5v
SCL: clock of 12C bus
SDA: 12C bus data
INT: interrupt pin
RD: output 2.8v, drive infrared LED
RD: output 2.6v, drive red LED
GND: grounding
Principle description:
There are three traditional methods of pulse measurement: one is the extraction of ecg signals; Second, the pulse rate is calculated from the fluctuation measured by the pressure sensor during the measurement of blood pressure. Third, the light volume method. The first two methods of extracting signals restrict the patient's movement, and if used for a long time, it will increase the patient's physical and psychological discomfort. As one of the most common measurement methods in monitoring measurement, the optical volume pulse measurement has the characteristics of simple method, convenient to wear and high reliability.
The basic principle of light volume method is to measure pulse and blood oxygen saturation by using different light transmittance caused by vascular pulsation of human tissues. Secure to client's finger, wrist, or earlobe by bandage or clip. When measuring blood oxygen saturation, according to the oxygen hemoglobin (Hb02) and hemoglobin (Hb) to infrared light, infrared light absorption to calculate. Blood vessels dilate and contract with the heartbeat, when diastolic blood volume, absorption of red and infrared light more, when systolic, blood volume less, absorption of red and infrared light less. Heart rates can be calculated based on periodic changes in the amount of light reflected to the sensor. Formula for calculating blood oxygen saturation
Directions for use
The module's 12C communication interface is compatible with 1.8v /5V and can communicate with most conventional development boards.
The 1.8v /5V level can be selected by the solder joint on the module. As shown in the figure below, the middle of the solder joint is the common point and the two sides are the selected level connection points. The product is connected to 3.3v by default

   W2812 RGB full-color module for D1 mini WIFI extension board learning board RGB driver module
Product features:
1. Supporting the D1 MINI
2. The compatible, using IDE for programming
3.11 the XI/O pins
4.1 XADC pin (0-3.3 - V)
5. Support the OTA online
   1.Long female pins x2pcs
   2.Short female pins x2pcs
   3.Normal pins x2pcs
   4.W2812 RGB Shield x1pcs

 
18650 Battery Cell Holder Safety Spacer Radiating Shell Storage Bracket Fits For 1x 18650 battery

2803 ULN2803A Darlington tube high pressure large current drive
 

 
Type-C PD decoy module PD23.0 to DC DC trigger extension cable QC4 charger 9V 12V 15V 20V PDC004-PD

AT24C256 2ECL IIC/I2C Serial Interface Port EEPROM Memory Module For DIY Electronic Car 3.3-5V
 
 
 

 
 
Nordic Semiconductor nRF51822 is a multi-protocol bluetooth low energy / 2.4 GHz dedicated RF single chip solutions, widely used in PC peripheral, Internet TV, toys, remote controls, sports/fitness/health sensors and automation applications.
IC features include:
16 KB and 256 KB on-chip flash RAM;
Digital and mixed-signal surrounding, including SPI, 2 - wire, ADC and quadrature decoder;
16 PPI channels;
Load match on a chip "when the power supply range of 1.8-3.6 V, 1.75 1.95 V" bypass mode;
Slice up and pull DC/DC converter for 3 v battery (for example, a button battery);
On /- 250 parts per million (PPM) 32 KHZ RC oscillator, the bluetooth application of low power consumption, does not need external 32 KHZ crystals, can save cost and PCB space;
6x6mm 48pin QFN packages, providing up to 32 GPIO;
A complete bluetooth protocol stack (the link layer to the configuration file).
NRF51822 S110 is downloadable, royalty-free, precompiled binary bluetooth stack, low power consumption can be independent programming and update. Features include:
Asynchronous API and event-driven SVC;
The runtime protection;
GATT, GAP and L2CAP level API;
Peripheral and broadcasting role;
GATT client and the server;
And more than 2.4 GHz RF proprietary protocols of parallel protocol operations;
Less than 128 KB of code and 6 KB of RAM, with more than 128 KB of flash memory for the application and 10 KB of RAM;
And use a generation compared to nRF8001 dual chip application, running S110 stack nRF51822 cut as much as 50% of power consumption.
S110 stack and nRF51822 nRF518 SDK to cooperate with each other and nRF518 contains comprehensive bluetooth low energy profile, services, and sample collection.
NRF51822 for proprietary application provides a new modified Gazell 2.4 GHz RF protocol stack, and series nRF24L Gazell application to interoperability. Compared with the last generation nRF24LE1, nRF51822 combined with new Gazell protocol stack can cut as much as 30% of power consumption.
Nordic Semiconductor nRF51822 is a multi-protocol bluetooth low energy / 2.4 GHz dedicated RF single chip solutions, widely used in PC peripheral, Internet TV, toys, remote controls, sports/fitness/health sensors and automation applications.
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 

 
 
Nordic Semiconductor nRF51822 is a multi-protocol bluetooth low energy / 2.4 GHz dedicated RF single chip solutions, widely used in PC peripheral, Internet TV, toys, remote controls, sports/fitness/health sensors and automation applications.
IC features include:
16 KB and 256 KB on-chip flash RAM;
Digital and mixed-signal surrounding, including SPI, 2 - wire, ADC and quadrature decoder;
16 PPI channels;
Load match on a chip "when the power supply range of 1.8-3.6 V, 1.75 1.95 V" bypass mode;
Slice up and pull DC/DC converter for 3 v battery (for example, a button battery);
On /- 250 parts per million (PPM) 32 KHZ RC oscillator, the bluetooth application of low power consumption, does not need external 32 KHZ crystals, can save cost and PCB space;
6x6mm 48pin QFN packages, providing up to 32 GPIO;
A complete bluetooth protocol stack (the link layer to the configuration file).
NRF51822 S110 is downloadable, royalty-free, precompiled binary bluetooth stack, low power consumption can be independent programming and update. Features include:
Asynchronous API and event-driven SVC;
The runtime protection;
GATT, GAP and L2CAP level API;
Peripheral and broadcasting role;
GATT client and the server;
And more than 2.4 GHz RF proprietary protocols of parallel protocol operations;
Less than 128 KB of code and 6 KB of RAM, with more than 128 KB of flash memory for the application and 10 KB of RAM;
And use a generation compared to nRF8001 dual chip application, running S110 stack nRF51822 cut as much as 50% of power consumption.
S110 stack and nRF51822 nRF518 SDK to cooperate with each other and nRF518 contains comprehensive bluetooth low energy profile, services, and sample collection.
NRF51822 for proprietary application provides a new modified Gazell 2.4 GHz RF protocol stack, and series nRF24L Gazell application to interoperability. Compared with the last generation nRF24LE1, nRF51822 combined with new Gazell protocol stack can cut as much as 30% of power consumption.
Nordic Semiconductor nRF51822 is a multi-protocol bluetooth low energy / 2.4 GHz dedicated RF single chip solutions, widely used in PC peripheral, Internet TV, toys, remote controls, sports/fitness/health sensors and automation applications.