Üzleti, irodai és ipari

 
Tracking info of  China Post Ordinary Small Packet Plus can be check here : www.17track.net/en 
 
 
 
 
 
 
 
2GT Timing Pulley Features:
 
Belt is rubber, fiberglass reinforced, 6mm wide, 2mm pitch.
For 3D Printing applications, GT2 2mm belt system works better than T5, T2.5, it gives better smoothness and accuracy of positioning, resulting in better printing quality. GT2 timing belt system especially suited for linear movement and positioning applications.
Listing includes:
2 x 20 Teeth GT2 Aluminum Pulleys 5mm Bore .
2 x M3 setscrews
1 x Allen Key
1 x 2GT Fiberglass Reinforced Rubber Open Belt (2m pitch x 6mm wide).Belt length 2000mm
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 

Description:
1 component profiles
ModelBF350-3AA/1.5AA
Sensitivity factor: 2
Strain limit: 2%
Grid wire: longxwide2x3.5mm
Base size: longxThe width of 5X4.5mm
Base material: modified phenolic substrate.
Grid wire material
Resistance: 350 ohms
Fatigue life: >10000000 times
Flux: ordinary rosin solder
 
The working principle of resistance strain gauge is based on the strain effect produced by mechanical deformation, namely the role of conductor or semiconductor materials in the external force when the resistance value changes, this phenomenon is called "strain effect".
 
The strain gauge is attached to the object to be measured, so that it is bent along with the strain of the measured object. A lot of metal in the mechanical bending of its resistance will change.
 
 
2 product profiles
 
Voltage: 5V
Two tube reverse protection ~ (to prevent the power supply connected to the back)
On board with a blue LED power indicator
Analog output
The higher the bending degree, the higher the output voltage
Zero potentiometer
Can be used to adjust the output voltage of the starting voltage
Output analog voltage 0-3.5V
Board size: 32 X 17 mm
The board is printed with pin output definition
(bending strain gauge can change the output voltage)
Q: how do you use this principle?
This is the bending sensor
Said the principle is also to detect the degree of bending, the strain piece affixed to the carrier, such as: Iron and aluminum plastic film and then bending the carrier, the strain gauge to detect the bending output voltage will change.
The strain gauge can be affixed to any object, the bending is detected, and then the voltage of the module is bent.
(welding strain films should pay attention to the temperature is not too high 300 degrees below the appropriate welding time of 3 seconds, please use the welding wire cord is appropriate)
 

ProtoBoard Shield for D1 mini double sided perf board Compatible
 

ESP-32S ESP32 ESP-32 Bluetooth and WIFI Dual Core CPU with Low Power Consumption MCU ESP-32
 

L9110 Fan Module for Robot Design and Development Control
 

RPR220 Optoelectronic Switch Reflective Optical Coupling Sensor
_External dimensions (Units: mm)
260
Sensors
Reflective photosensor (photoreflector)
RPR-220
The RPR-220 is a reflective photosensor. The emitter is a GaAs infrared light emitting diode and the detector is a high-
sensitivity, silicon planar phototransistor. A custom lamp was developed to enable the achievement of a smaller package
than with conventional reflectors.
_Applications
Compact disk players, Copiers, Game machines,
Office automation equipment
_Features
1) A plastic lens is used for high sensitivity.
2) A built-in visible light filter minimizes the influence of
stray light.
3) Lightweight and compact.
_Absolute maximum ratings (Ta = 25_C)261
Sensors RPR-220
_Electrical and optical characteristics (Ta = 25_C)
_Electrical and optical characteristic curves262
Sensors RPR-220
_Circuit for testing transfer characteristics

This module is designed specifically for the Raspberry Pi RTC module. Module uses I2C communication mode and Raspberry Pi. Onboard DS1307 clock chip and a button battery guaranteed after 1220 Raspberry Pi power still can remember the time. Set aside a serial port, TTL convenient way online debugging. Small size, big power
 
1. l-board Maxim d DS1307 chip;
 
l CR1220 button batteries that power;
 
l can be directly used shell script operations;
 
l lead Raspberry Pi serial for debugging;
 
l programmable square-wave output.
 
2: Product Interface:
 
l Raspberry Pi B version 2X13 socket;
 
l Raspberry Pi A / B / 2-generation 2X20 socket;
 
l support Raspberry Pi B / A / B / 2;
 
l 2 * 5p 2.54mm pitch interface.
 
3: Parameters:
 
l an operating voltage of 5V;
 
l 0 ° C to 40 ° C temperature range clock accuracy of ± 2ppm;
 
l real-time clock provides seconds, minutes, hours, day, date, month, and year information and provide valid until the year 2100 a leap year compensation;
 
l two calendar alarm clock;
 
l Working temperature: -10 ° C to 85 ° C.
 
4: Typical applications:
 
l telematics systems

Static drive 2 segment Digital Tube LED Display Module 2 Digital 74HC595 tube 100% new original
 

Static drive 2 segment Digital Tube LED Display Module 2 Digital 74HC595 tube 100% new original
 

Static drive 2 segment Digital Tube LED Display Module 2 Digital 74HC595 tube 100% new original
 

 

 
Trigger Cycle Timer Delay Switch Circuit Board MOS Tube Control Module 12 24V
 
 

Description:This tiny little board does all of the neat-o for tricks that you\\\'re familiar with: 4 channels of 10-bit ADC, 5 PWM pins, 12 DIOs as well as hardware serial connections Rx and Tx. Running at 16MHz and 5V, this board will remind you a lot of your other favorite for -compatible boards but this little guy can go just about anywhere. There is a voltage regulator on board so it can accept voltage up to 12VDC. If you\\\'re supplying unregulated power to the board, be sure to connect to the "RAW" pin on not VCC.
This latest revision corrects the silk error from the last version of the board so that pin 14 is correctly labeled. We\\\'ve also added a PTC fuse and diode protection to the power circuit and corrected the RX and TX LED circuit.
Features:
ATMega 32U4 running at 5V/16MHz
Supported under for IDE v1.0.1
On-Board micro-USB connector for programming
4 x 10-bit ADC pins
 
 
 
 

14*17 Volume Control Rotary Knobs Black For 6mm Dia. Knurled Shaft Potentiometer

 
USB Current Voltage Tester USB Voltage Ammeter USB Detector Double Row Shows New
Article-Nr.:5401323
Product Details:
USB Current Voltage Tester
Condition: New
Measuring range: DC 3v - 9v, current: 0-3a (error: ± 1% ), 5a biggest support
5a current (if more than 3a, error will be larger than 3% )
Color is shown as pictures
PLS NOTE that due to lighting effects, monitor\'s brightness/ contrass settings ect, there could be some slight differences in the color tone of the pictures and the actual item!
Package Included:
1 X USB Current Voltage Tester

GY-6500 MPU-6500 6DOF six-axis accelerometer 6-axis attitude gyro sensor module SPI Interface MPU6500
 

 
Product Description:
Colour  : Blue
Material : Aluminum alloy 
Inner d1*d2 : 5mm x 8mm
Outer diameter : 14mm
Total length : 25mm
Scwer hole diameter : 4mm

DC-DC 5V to 3.5V / 12V USB Step UP / Down Power Supply Module Adjustable Boost Buck Converter Out DC 1.2V-24V
 
 
 
 
 

 
Specifications:
Brand new and high quality.
Measuring range: DC 0V--30V.
Input range: DC 4.5V-30V(Max Input: DC 30V. The device can be damaged if input is over 30V).
Working Current: < 23mA.
Display Color: RED.
Display: Three 0.56 "digital tube.
Measurement accuracy: ±1% .
Refresh rate: about 300mS / times.
Input impedance: > 100K.
Operation Temp: -10degrees- 65degrees.
Size:2.8cm x 4.7cm x 2.1cm.
Wiring:
Red:power supply .
Black:power supply -, measure -.
White:measure .
 

Specifications:
- Supply Voltage: 2.7v-5.5v @ 3mA current
- Output: 2Vpp on 1.25V bias
- Frequency Response: 20Hz - 20KHz
- Programmable Attack and Release Ratio
- Automatic gain, selectable max from 40dB, 50dB or 60dB
- Low Input-Referred Noise Density of 30nV/
- Low THD: 0.04% (typ)
 
Package included:
CJMCU MAX9814 microphone AGC amplifier*1
 

Specifications:
- Supply Voltage: 2.7v-5.5v @ 3mA current
- Output: 2Vpp on 1.25V bias
- Frequency Response: 20Hz - 20KHz
- Programmable Attack and Release Ratio
- Automatic gain, selectable max from 40dB, 50dB or 60dB
- Low Input-Referred Noise Density of 30nV/
- Low THD: 0.04% (typ)
 
Package included:
CJMCU MAX9814 microphone AGC amplifier*1
 

Specifications:
- Supply Voltage: 2.7v-5.5v @ 3mA current
- Output: 2Vpp on 1.25V bias
- Frequency Response: 20Hz - 20KHz
- Programmable Attack and Release Ratio
- Automatic gain, selectable max from 40dB, 50dB or 60dB
- Low Input-Referred Noise Density of 30nV/
- Low THD: 0.04% (typ)
 
Package included:
CJMCU MAX9814 microphone AGC amplifier*1
 

This module features:
All the chips we guarantee are brand new imported industrial-grade chips, which can reach a distance of thousands of meters.
The ESD protection with plus or minus 15KV
3, chip driver is set rate, reduce EMI, and reduce caused by the improper matching cable terminal signal reflection, making the error-free signal transmission rate is as high as 500 KBPS.
A receiver that has a unit load of 1/4 is an impedance that supports multiple communication and allows for a bus that is connected to no more than 128 devices.
5, industrial-grade chips working temperature can reach to 40 ° to 85 °.
6, this module can be hot plug, no other 485 chip heat plug is dead phenomenon.
The power supply is used with the tantalum electrolytic capacitor, and the double capacitor is used for high low-frequency power filtering
Using double transient suppression diode, the over-voltage protection performance is excellent
9, 10 Ω current protection resistance, patch designed to improve 485 signal integrity
It has terminals and welded lead holes, easy to debug and fixed wiring, and welding leads can improve the reliability of the signal
The RS485 and the TTL signal are all single-sided, ensuring the quality of the signal and improving signal integrity
Spread copper over large areas to prevent signal interference
It has 2.54 interval hole welded hole for your secondary development
It has the M3 screw hole which is quite commonly used now, and the installation is convenient and reliable
15, have 120 Ω termination resistor, can make short sub R16 can termination resistor
16, with power supply and RXD, TXD signal, receiving and receiving
The Angle pin is introduced to facilitate testing
Support 3.3 V and 5V signal control and compatibility

     Features:
     100% Brand New.
    Size: 48mm x 29mm x 26mm.
    Display color: Red & Blue LED (dual display).
    Display: 0.28" LED digital.
    Operating voltage: DC 4.5 ~ 30V.
    Measure voltage: DC 0 ~ 100V.
    Minimum resolution (V): 0.1V.
    Refresh rate: 500ms / times.
    Measure accuracy: 1% (± 1 digit).
    Minimum resolution (A): 0.01A.
    Operating Current: <20mA.
    Measure current: 10A (direct measurement, built-in shunt).
    Operating temperature: -10 to 65°c.
    Operating Humidity: 10 to 80% (non-condensing).
    Mounting cutout: 45.5mm x 26.5mm.
 

, new original CH340G chips, the chips are STC official recommendation USB to TTL chips will not appear due to a different drive / different computer as a result of incompatibilities! ! !
2, golden appearance, quality and upscale yellow pin, pin durable than the black market, beautiful;
3, not only have the power light PWR, TXD and RXD LEDs also reserved RTS, CTS location convenient and intuitive know whether the product is at work in the absence of the instrument case;
4,3V3 and 5V by a short circuit risk selection;
5, support WINDOWS 98 / ME / 2000 / XP / Server 2003 / VISTA /
Server 2008 / Win7 / Win8 32 Bit / 64
 

 
 

24V 12V turn 5V 5A , adjustable step-down power Supply module NEW,morr than LM2596 LM2596S
 

BBS:http://mh.nodebb.com
Product introduction:
The INMP441 is a high performance, low power, digital output, omnidirectional MEMS microphone with bottom port. The
The complete INMP441 solution consists of a MEMS sensor, signal conditioning, analog to digital converter, anti-aliasing filter, power management and industry standard 24-bit I2S interface. The I2S interface allows the INMP441 to be directly connected to digital processors such as DSPs and microcontrollers without the need for an audio codec for use in the system. The INMP441 has a high signal-to-noise ratio and is an excellent choice for near field applications. The INMP441 has a flat wideband frequency response that results in high definition of natural sound.
Product Features:
1. Digital I2S interface with high precision 24-bit data
2. High signal to noise ratio is 61 dBA
3. High sensitivity - 26 dBFS
4. Stable frequency response from 60 Hz to 15 kHz
5. Low power consumption: low current consumption 1.4 mA
6. High PSR: -75 dBFS
Interface definition:
SCK: Serial data clock for I2S interface
WS: Serial data word selection for I2S interface
L/R: Left/Right channel selection.
When set to low, the microphone outputs a signal on the left channel of the I2S frame.
When set to high level, the microphone outputs signals on the right channel
SD: Serial data output of the I2S interface.
VCC: Input power, 1.8V to 3.3V.
GND: power ground
This product provides tutorials for using ESP32 modules with I2S functionality.
Connect to ESP32:
 INMP441 ESP32
SCK >> GPIO14
SD >> GPIO32
WS >> GPIO15
L/R >> GND
GND >> GND
VDD >> VDD3.3
What is the difference between an omnidirectional microphone and a unidirectional microphone:
First of all, I understand that the sound divergence is all-round. One person speaks and diverge in the air.
As for how far it can pass, it depends on many factors.
1.directional microphone, the general pickup radius is very small, 30 cm is a big one, single use, put it on the mouth, the sound quality is very good, because it is not picked up again.
The shape is generally goose neck wheat, a rod, a curved rod, to your mouth, directivity, just listen to your voice.
With a single-point microphone, the sensitivity is limited to a certain range. Sensitivity is too high, causing sharp whistling, etc., involving many other devices
As for why not make a big pickup radius, there is a reason. Later
2.omnidirectional microphone, the general pickup radius is very large, one meter two meters three meters five meters have, compared with ten centimeters, this level is very different, it is not just picking a person's voice, but Multiple people, five six, seven eight or even ten.
Omnidirectional microphones are highly sensitive,
The omnidirectional microphone pickup radius is too large, and it will also pick up more ambient noise, so the sound quality is not as good as the single-point microphone, unless you do a good noise reduction. There is definitely a difference between collective use and single-person service.
But omnidirectional wheat has a benefit, the wiring is simple, not one by one. Suitable for small meetings, ad hoc meetings, some remote discussions, remote operations.
3.single-point wheat generally supports local amplification,
Omnidirectional microphones generally do not support local amplification. It should be noted that because of such high sensitivity, the local amplification whistling is very scary, and the current technology is difficult to deal with.

data
https://pan.baidu.com/s/15UMUH5_ppb2FTju7AJgFyw

Leonardo R3 development board Board for arduino ATMEGA32U4

Leonardo R3 development board Board for arduino ATMEGA32U4

 
 
The USB to RS232 module based TTL provides the best and convenient way to connect your RS232 TTL Devices or demo board to your PC via the USB port.
Supports the following Windows OSes:
Windows 98SE
Windows ME
Windows 2000 SP4
Windows XP SP2 and above (32 & 64 bit)
Windows Server 2003 (32 & 64 bit)
Windows Server 2008 / 2008 R2 (32 & 64 bit)
Windows Vista (32 & 64 bit)
Windows 7 (32 & 64 bit)
NOTE: For Windows 7, please use RC build 7100 or above.

Joint: IPX13
Wire: RF113 silver plating
Line length: 15 cm
 

Parameters:
1. Working voltage:5V
2. 8-channel infrared detector
Applications:
1. Robot
2. Smart Car
3. Laboratory
4. DIY
 
 
 

A, PCF8563 clock chip
PCF8563 is a PHILIPS company launched an industrial I2C bus interface with a very low power consumption of multi-functional clock / calendar chip. PCF8563 a variety of alarm function, timer function, clock output function and interrupt output function to complete a variety of complex timing services, and even for the microcontroller to provide watchdog function. It is a cost-effective clock chip, which has been widely used in the field of electric meters, water meters, gas meters, telephones, fax machines, portable instruments and battery powered instruments and meters.
Main performance index of PCF8563:
You can use the standby battery
Wide voltage range of 1.0~5.5V.
This ultra low power consumption: the typical value is 0.25uA
It through the I2C bus serial input / output
This programmable clock output frequency: 32.768KHz, 1024Hz, 32Hz, 1Hz.
* four alarm and timer function
It includes a reset circuit, oscillator capacitor and power failure detection circuit
Open drain interrupt output.
400KHZ read and write speed
Two, module interface description
Left battery mounting interface
Pay attention to the installation direction, according to the direction of the image installation
Right INT interrupt output (generally not used)
COT clock output (generally not used)
SCL IIC clock interface MCU IO port
SDA IIC digital interface MCU IO port
The GND module of extraterrestrial grounding
VCC power supply interface 3.3v-5v
 

INTRODUCTION:
Sing for the moment! The DFPlayer Mini is a small and low cost MP3 module with an simplified output directly to the speaker. The module can be used as a stand alone module with attached battery, speaker and push buttons or used in
combination with an (for) (for)UNO or any other with RX/TX capabilities.
 
It is  perfectly integrates hard decoding module, which supports common audio formats such as MP3, WAV and WMA. Besides, it also supports TF card with FAT16, FAT32 file system. Through a simple serial port, you can play the designated
music without any other tedious underlying operations.
APPLICATIONS:
Car navigation voice broadcast;
Road transport inspectors, toll stations voice prompts;
Railway station, bus safety inspection voice prompts;
Electricity, communications, financial business hall voice prompts;
Vehicle into and out of the channel verify that the voice prompts;
The public security border control channel voice prompts;
Multi-channel voice alarm or equipment operating guide voice;
The electric tourist car safe driving voice notices;
Electromechanical equipment failure alarm;
Fire alarm voice prompts;
The automatic broadcast equipment, regular broadcast.
SPECIFICATION:
Supported sampling rates (kHz): 8/11.025/12/16/22.05/24/32/44.1/48
24 -bit DAC output, support for dynamic range 90dB , SNR support 85dB
Fully supports FAT16 , FAT32 file system, maximum support 32G of the TF card, support 32G of U disk, 64M bytes NORFLASH
A variety of control modes, I/O control mode, serial mode, AD button control mode
Advertising sound waiting function, the music can be suspended. when advertising is over in the music continue to play
Audio data sorted by folder, supports up to 100 folders, every folder can hold up to 255 songs
30 level adjustable volume, 6 -level EQ adjustable
Document: If you need it, please contact with us
 
 

Features:
 Support sampling frequency (kHz):8 / 11.025 / 12 / 16 / 22.05 / 24 / 32 / 44.1 / 48
 Support file format:MP3/WAV
 Support Micro SD card, Micro SDHC Card
 30 class adjustable volume
 UART TTL serial control playback mode, baud rate is 9600bps
 Power supply can be 3.2 ~ 5.2VDC
 Size:43mm x 25mm
 
 

ESP8266 5V WiFi 2 CHANNEL RELAY MODULE Things smart home remote control switch phone APP
 Description:
The 5V dual WiFi relay module uses ESP-01 as the WiFi module and is compatible with 8 bit MCU chip. Only a simple configuration process can realize the wireless control of the 2 way relay by using the mobile phone APP .
 
 Function:
1.Onboard   ESP-01 WiFi modules and  high performance microprocessor STM8S103 .
 
2 The module has 2 operating modes of work:
           Mode 1: mobile phone is directly mounted on WiFi module.
           Mode 2: mobile phones and WiFi modules are equipped on routers simultaneously
           Additional function: it can also be used as USB relay when ESP-01 is pulled out.
 
3.Transmission distance:
In an open environment, the maximum stable transmission distance is 100M when the mobile phone is mounted on the WiFi module.
 
4. When the WiFi module and mobile phone are carried on the router at the same time, the transmission distance depends on the signal strength of the router.
     
5. Onboard 5V, 10A//250V AC 10A//30V DC relay, which can be continuously pulled for 100 thousand times, has diode discharge protection, short response time.
 
6 .The use of Smartcongig technology in the mobile phone on the APP ESP-01 WiFi module to complete the account and password configuration, configured username and password memory function.
 
     
7.Board mode selection and real time working status indicator.
 
8. Reserved UART debug interface and STM8 SWIM program download interface.
 
9. Board size: 59*40mm.

Specifications:
Model: 6 string 22V 24V lithium battery protection board
Size: about 4.9x3.1cm(1.92x1.22'')
Maximum operating current: Within15A
Charging current: Within 15A
Balanced charge: None
Short circuit protection: Yes
Applicable assembly: Nominal 3.7V Batteries / 6 strings
6 string 22V power tools solar lighting, 18650 dedicated, three yuan 3.7V lithium battery protection board, BMS protection board. Battery protection board, as the name suggests battery protection board is mainly rechargeable (Refers to the lithium battery) and protect the integrated circuit board. Lithium battery (rechargeable type) so need protection, is determined by its own characteristics. As the lithium battery its material determine itself can not be overcharge, over discharge, overcurrent, short circuit and ultra-high temperature charge and discharge, so lithium battery lithium components will always follow A protective plate with sampling resistor, and a current fuse.
Package Included:
1 x Protection Board For 18650 Lithium Battery
Notice
- Due to different producing batches, product details might be a little different. If you minding the difference, please buy it carefully.
- Please allow 1-3CM differs due to manual measurement.
- Due to the different display and different light, the picture may not reflect the actual color of the item. Thanks for your understanding.
 
 
 
 
 

PWM to Voltage Converter /Frequency Voltage Converter Module 0% -100% to 0-10V/0-10V to 0-10KHz Analog Converter Module
 
 
PWM to Voltage Module
(PWM to Voltage Converter Module 0% -100% to 0-10V for PLC MCU Digital to Analog Signal PWM Adjustabl Converter Power Module)
1. Description:
The PWM transfer voltage module LC-LM358-PWM2V converts the PWM digital signals into 0 to 10V analog signals.
It can be used as signal interface switching for PLC or other industrial control boards. The output voltage is regulated by adjusting the duty ratio of the PWM. The modules are small in size and easy to use in different places.
2. Features:
1>. MCU embedded technology
2>. Easy to operate, fine tuned by potentiometer
3>. Select the PWM signal input level range through short-circuit
4>. The module is smaller, easy to carry and use
3. Parameter:
1>. Work Voltage:DC 12V-30V; (> 100MA)
2>. PWM Receiver Frequency:1KHZ-3KHZ
3>. PWM signal input level range:
The peak of 4.5V to 10V level. The short cap install in 5V'. This level is used for normal controller or 5V MCU
The peak of 12V to 24V level, so inserted in 24V. The short cap install in 24V'. This level is used for normal PLC controller 
4>. Conversion range:0% -100% PWM to 0-10V
5>. Allowable error:5%
4. Hardware Interface:
VCC

DC 12V-30V
GND

Ground
PWM

Positive of PWM input signal
GND

Negative of input signal
VOUT

Output Voltage 0-10V
GND

Output Voltage Ground
 
 
5. Operation instructions:
After power on, without input signal, the output is 0V, so only input can output.
The first time when the power is on, it is best to do a calibration debugging:Input a 50% duty ratio signal to PWM/GND and adjust the relative amplitude short cap. The frequency is 1KHZ-3KHZ, Measured VOUT and GND with a multimeter and it will display 5V. Adjust potentiometer to make sure display 5.00V on multimeter. This will calibrate your pulse signal to this module.
      When the frequency changes, the correspondences may be offset and need to be re calibrated.
      The output voltage can be adjusted by adjusting the duty ratio.
      The accuracy can be controlled by adjusting the potentiometer.
 
Voltage to Frequency Module
Frequency Voltage Converter 0-1KHz To 0-10V Digital To Analog Voltage Signal Conversion Module Frequency Conversion To Voltage
Overview:
The voltage to frequency module LM331_V2F is a module that can generate different frequencies depending on the input voltage. It is capable of converting 0-10V voltage into a frequency pulse signal of 0-10KHz.
Features:
1. Input voltage, output frequency signal.
2. The output signal can be fine-tuned, and the potentiometer can be adjusted to calibrate the correspondence between voltage and frequency.
3. The output of this module can be supplied to the driver for pulse signal. It must be connected to the driver for common anode connection. The relevant wiring is OC-OUT: PUL- or PUL12-30V connected to the driver: PUL or common terminal 5V connected to the driver, ( When powering 12V, it is necessary to string a 330R resistor. When powering 13-24V, it is necessary to string a 2.7K resistor to limit the current)
Technical Parameters:
Working voltage: 13.5V-30V.
Input controllable voltage range: 0-10V.
Output frequency range: 0-10KHz.
Wiring instructions:
VCC: Working power supply.
GND: Power ground.
IN : Input voltage.
IN-: Input ground.
OCOUT: Signal collector output port (use this output port when equipped with a driver).
FOUT: Frequency output port (common frequency output port).
Two independent outputs, OC-OUT is NPN and FREQ-OUT is IC output. The common cathode end is matched with the negative GND of the power supply. When the common anode wiring is used with the power supply, when the common anode wiring is 13-24V, it is necessary to string a 2.7KR resistor, and the common anode wiring is 12V power supply. To string a 330R resistor.
Instructions:
The frequency pulse signal is connected to F, and there is a corresponding voltage output at the VOUT terminal.
Input and output correspondence:
1V = 1KHz
10V = 10KHz
If there is a deviation in the correspondence when using, you can adjust the potentiometer on the board to calibrate.

DRV8833 2Channel DC Motor Driver Module Board 1.5A 3V-10V
 

DRV8833 2Channel DC Motor Driver Module Board 1.5A 3V-10V
 

 
Tracking info of  China Post Ordinary Small Packet Plus can be check here : www.17track.net/en 
 
length : 30cm
1p-1p pin header
Compatible with 2.54mm spacing pin headers
40pcs wires in one line
 
Package includes:
One line with 40pcs wires X1
 
 

 
 
that will be (40 m-m) (40 m-f) (40 f-f) = 120 total cables

Product Introduction
    JDY-23 transparent transmission module is based on Bluetooth 5.0 protocol standard, working frequency range is 2.4GHZ range, modulation mode is GFSK, maximum transmission power is 4db, maximum transmission distance is 60 meters, adopts imported original chip design, supports users to modify equipment through AT command Instructions such as name and baud rate are convenient and quick to use.
 
The JDY-23 Bluetooth module can realize module and mobile phone data transmission. By default, BLE Bluetooth can be used for product application without configuration.
 
 Make BLE faster and easier to use in products
 
Module Parameter Details
JDY-23 product parameters                                                        
model

JDY-23
Working frequency

2.4G
Transmit power

4db(maximum)
  Communication    Interface

UART
  Operating              Voltage

1.8V - 3.6V
Operating temperature

-40° - 80°
antenna

Built-in PCB antenna
  Receiving              sensitivity

-97dbm
Transmission distance

60 meter
  Master-slave        support

Slave
Module size

19.6 * 14.94 *1.8 mm(Length, width and height)
Bluetooth version

BLE 5.0(Compatible with BLE4.0, BLE4.2)
Awakening state current

800uA(Broadcast)
Light sleep state current

<50uA (Broadcast)
  Deep sleep            current

9uA (No broadcast)
  Instruction            parameter              saving

Parameter configuration power-down data is saved
SMT soldering temperature

<260°
rf-TX/RX peak current

5mA

PCF8591 AD / DA chip introduced
PCF8591 is a monolithic, single supply, low-power, 8-bit CMOS data acquisition devices. PCF8591 has 4 analog inputs, one analog output and a serial I2C bus interface. PCF8591 of three address pins A0, A1 and A2 can be used for programming the hardware address, allowing access to eight PCF8591 devices on the same I2C-bus, without the need for additional hardware. Input and output on the PCF8591 device address, control and data signals through two-line bidirectional I2C bus serially transmitted.
PCF8591 Key performance indicators:
 single power supply
 PCF8591 operating voltage range of 2.5V-6V
 
 Low Standby Current
 via I2C-bus serial input / output
 PCF8591 by 3 hardware address pins addressing
 PCF8591 I2C bus speed sampling rate decision
 4 programmable analog inputs for single-ended or differential inputs
 auto increment channel selection
 PCF8591 analog voltage range from VSS to VDD
 PCF8591 built-in track and hold circuit
 8-bit successive approximation A / D converter
 DAC gain realized by an analog output
 
Two baby description
A module chip PCF8951
2 module supports four external voltage input acquisition (voltage input range 0-5v)
3 modules integrated photoresistor, you can collect the ambient light intensity AD exact numeric
4 modules integrated thermistor, you can collect the ambient temperature exact numeric AD
5 module integrates a road 0-5V voltage input acquisition (via the blue potentiometer to adjust the input voltage)
6 modules with power indicator (on the module power indicator will light)
7 modules with DA output indicator, when the module DA output interface voltage reaches a certain value, it will light up the board DA output indicator, the greater the voltage, the LED brightness is more obvious;
8 module PCB size: 3.6cm * 2.3cm
9 standard dual panel, thickness 1.6mm, nice layout, surrounded by a through-hole, pore size: 3mm, convenient fixed
 
 
Three module interface specification
The module on the left and right, respectively, 2-way external expansion pin connector, respectively, as follows:
DA output interface chip left AOUT
AINO chip analog inputs 0
AIN1 chip analog inputs 1
AIN2 chip analog inputs 2
AIN3 chip analog inputs 3
The right of the clock SCL IIC interface connected microcontroller IO port
SDA IIC digital interface connected microcontroller IO port
GND module to external ground
VCC power supply interface external 3.3v-5v
 
Four modules red cap shorted instructions
There are three red module shorted cap, respectively, the following effects:
P4 P4 shorting cap connected, select thermistor access circuit
P5 P5 connected shorting cap, select photoresistor access circuit
P6 P6 connected shorting cap, select 0-5V adjustable voltage access circuit