Tesztberendezés alkatrészei és tartozékai

Description
Product name: DC-DC step-down charging module

Product size: L42mm*W16mm*H5mm

Input: 7.5V-28V

Output: 5V/3A

Conversion efficiency: 96% (Max)

Switching frequency: 1.5MHZ (Max) Typical 1MHZ

Working temperature: -40℃- 85℃

Load capacity: large output 3A, 2A long-distance running
Scope of application: USB5V powered devices such as mobile power supplies, mobile phones, tablets, etc.

Introduction
ote: The charge should disconnect the load OUT terminal on the positive and negative can not be wrong, please according to specifications, otherwise it will damage directly.
Module Features and parameters:
Inputs with MICRO USB female, can be directly input to do with the phone charger rechargeable lithium battery,
And still retains the input voltage wiring pads, can be very convenient DIY
Input voltage: 5V
Charging cut-off voltage: 4.2V ± 1%
Maximum charge current: 1000mA
Battery over-discharge protection voltage: 2.5V
Battery overcurrent protection current: 3A
Board size: 2.6 * 1.7CM

Instructions:
Note: The first time you access the battery, it may no voltage between the output OUT and OUT-, then access 5V voltage charge your energy can activate the protection circuit, and the battery from the B B-, then draw a line on the short open also need recharged to activate the protection circuit. Note that the charger must be able to output 1A or more to do when using a mobile phone charger input, or may not charge

MICRO USB female and next - pads for the power input, access 5V. B positive then the lithium battery, B- then negative lithium batteries. OUT and OUT- connected to the load, such as positive and negative electrodes connected mobile booster plate or other load.

Connect the battery to the B B-, inserted into the USB female mobile phone charger, the red light is being charged, the green light to full.

Introduction
ote: The charge should disconnect the load OUT terminal on the positive and negative can not be wrong, please according to specifications, otherwise it will damage directly.
Module Features and parameters:
Inputs with MICRO USB female, can be directly input to do with the phone charger rechargeable lithium battery,
And still retains the input voltage wiring pads, can be very convenient DIY
Input voltage: 5V
Charging cut-off voltage: 4.2V ± 1%
Maximum charge current: 1000mA
Battery over-discharge protection voltage: 2.5V
Battery overcurrent protection current: 3A
Board size: 2.6 * 1.7CM

Instructions:
Note: The first time you access the battery, it may no voltage between the output OUT and OUT-, then access 5V voltage charge your energy can activate the protection circuit, and the battery from the B B-, then draw a line on the short open also need recharged to activate the protection circuit. Note that the charger must be able to output 1A or more to do when using a mobile phone charger input, or may not charge

MICRO USB female and next - pads for the power input, access 5V. B positive then the lithium battery, B- then negative lithium batteries. OUT and OUT- connected to the load, such as positive and negative electrodes connected mobile booster plate or other load.

Connect the battery to the B B-, inserted into the USB female mobile phone charger, the red light is being charged, the green light to full.

Introduction
ote: The charge should disconnect the load OUT terminal on the positive and negative can not be wrong, please according to specifications, otherwise it will damage directly.
Module Features and parameters:
Inputs with MICRO USB female, can be directly input to do with the phone charger rechargeable lithium battery,
And still retains the input voltage wiring pads, can be very convenient DIY
Input voltage: 5V
Charging cut-off voltage: 4.2V ± 1%
Maximum charge current: 1000mA
Battery over-discharge protection voltage: 2.5V
Battery overcurrent protection current: 3A
Board size: 2.6 * 1.7CM

Instructions:
Note: The first time you access the battery, it may no voltage between the output OUT and OUT-, then access 5V voltage charge your energy can activate the protection circuit, and the battery from the B B-, then draw a line on the short open also need recharged to activate the protection circuit. Note that the charger must be able to output 1A or more to do when using a mobile phone charger input, or may not charge

MICRO USB female and next - pads for the power input, access 5V. B positive then the lithium battery, B- then negative lithium batteries. OUT and OUT- connected to the load, such as positive and negative electrodes connected mobile booster plate or other load.

Connect the battery to the B B-, inserted into the USB female mobile phone charger, the red light is being charged, the green light to full.

Introduction
ote: The charge should disconnect the load OUT terminal on the positive and negative can not be wrong, please according to specifications, otherwise it will damage directly.
Module Features and parameters:
Inputs with MICRO USB female, can be directly input to do with the phone charger rechargeable lithium battery,
And still retains the input voltage wiring pads, can be very convenient DIY
Input voltage: 5V
Charging cut-off voltage: 4.2V ± 1%
Maximum charge current: 1000mA
Battery over-discharge protection voltage: 2.5V
Battery overcurrent protection current: 3A
Board size: 2.6 * 1.7CM

Instructions:
Note: The first time you access the battery, it may no voltage between the output OUT and OUT-, then access 5V voltage charge your energy can activate the protection circuit, and the battery from the B B-, then draw a line on the short open also need recharged to activate the protection circuit. Note that the charger must be able to output 1A or more to do when using a mobile phone charger input, or may not charge

MICRO USB female and next - pads for the power input, access 5V. B positive then the lithium battery, B- then negative lithium batteries. OUT and OUT- connected to the load, such as positive and negative electrodes connected mobile booster plate or other load.

Connect the battery to the B B-, inserted into the USB female mobile phone charger, the red light is being charged, the green light to full.

Introduction
ote: The charge should disconnect the load OUT terminal on the positive and negative can not be wrong, please according to specifications, otherwise it will damage directly.
Module Features and parameters:
Inputs with MICRO USB female, can be directly input to do with the phone charger rechargeable lithium battery,
And still retains the input voltage wiring pads, can be very convenient DIY
Input voltage: 5V
Charging cut-off voltage: 4.2V ± 1%
Maximum charge current: 1000mA
Battery over-discharge protection voltage: 2.5V
Battery overcurrent protection current: 3A
Board size: 2.6 * 1.7CM

Instructions:
Note: The first time you access the battery, it may no voltage between the output OUT and OUT-, then access 5V voltage charge your energy can activate the protection circuit, and the battery from the B B-, then draw a line on the short open also need recharged to activate the protection circuit. Note that the charger must be able to output 1A or more to do when using a mobile phone charger input, or may not charge

MICRO USB female and next - pads for the power input, access 5V. B positive then the lithium battery, B- then negative lithium batteries. OUT and OUT- connected to the load, such as positive and negative electrodes connected mobile booster plate or other load.

Connect the battery to the B B-, inserted into the USB female mobile phone charger, the red light is being charged, the green light to full.

Introduction
ote: The charge should disconnect the load OUT terminal on the positive and negative can not be wrong, please according to specifications, otherwise it will damage directly.
Module Features and parameters:
Inputs with MICRO USB female, can be directly input to do with the phone charger rechargeable lithium battery,
And still retains the input voltage wiring pads, can be very convenient DIY
Input voltage: 5V
Charging cut-off voltage: 4.2V ± 1%
Maximum charge current: 1000mA
Battery over-discharge protection voltage: 2.5V
Battery overcurrent protection current: 3A
Board size: 2.6 * 1.7CM

Instructions:
Note: The first time you access the battery, it may no voltage between the output OUT and OUT-, then access 5V voltage charge your energy can activate the protection circuit, and the battery from the B B-, then draw a line on the short open also need recharged to activate the protection circuit. Note that the charger must be able to output 1A or more to do when using a mobile phone charger input, or may not charge

MICRO USB female and next - pads for the power input, access 5V. B positive then the lithium battery, B- then negative lithium batteries. OUT and OUT- connected to the load, such as positive and negative electrodes connected mobile booster plate or other load.

Connect the battery to the B B-, inserted into the USB female mobile phone charger, the red light is being charged, the green light to full.

Introduction
ote: The charge should disconnect the load OUT terminal on the positive and negative can not be wrong, please according to specifications, otherwise it will damage directly.
Module Features and parameters:
Inputs with MICRO USB female, can be directly input to do with the phone charger rechargeable lithium battery,
And still retains the input voltage wiring pads, can be very convenient DIY
Input voltage: 5V
Charging cut-off voltage: 4.2V ± 1%
Maximum charge current: 1000mA
Battery over-discharge protection voltage: 2.5V
Battery overcurrent protection current: 3A
Board size: 2.6 * 1.7CM

Instructions:
Note: The first time you access the battery, it may no voltage between the output OUT and OUT-, then access 5V voltage charge your energy can activate the protection circuit, and the battery from the B B-, then draw a line on the short open also need recharged to activate the protection circuit. Note that the charger must be able to output 1A or more to do when using a mobile phone charger input, or may not charge

MICRO USB female and next - pads for the power input, access 5V. B positive then the lithium battery, B- then negative lithium batteries. OUT and OUT- connected to the load, such as positive and negative electrodes connected mobile booster plate or other load.

Connect the battery to the B B-, inserted into the USB female mobile phone charger, the red light is being charged, the green light to full.

Introduction
ote: The charge should disconnect the load OUT terminal on the positive and negative can not be wrong, please according to specifications, otherwise it will damage directly.
Module Features and parameters:
Inputs with MICRO USB female, can be directly input to do with the phone charger rechargeable lithium battery,
And still retains the input voltage wiring pads, can be very convenient DIY
Input voltage: 5V
Charging cut-off voltage: 4.2V ± 1%
Maximum charge current: 1000mA
Battery over-discharge protection voltage: 2.5V
Battery overcurrent protection current: 3A
Board size: 2.6 * 1.7CM

Instructions:
Note: The first time you access the battery, it may no voltage between the output OUT and OUT-, then access 5V voltage charge your energy can activate the protection circuit, and the battery from the B B-, then draw a line on the short open also need recharged to activate the protection circuit. Note that the charger must be able to output 1A or more to do when using a mobile phone charger input, or may not charge

MICRO USB female and next - pads for the power input, access 5V. B positive then the lithium battery, B- then negative lithium batteries. OUT and OUT- connected to the load, such as positive and negative electrodes connected mobile booster plate or other load.

Connect the battery to the B B-, inserted into the USB female mobile phone charger, the red light is being charged, the green light to full.

Description
Mini Solderless Breadboard
1 Terminal Strip
Tie-point 170
ABS plastic material
Completely reusable
Coloured coordinates for easy component placement
Phosphor bronze nickel plated spring clips
Accepts a variety of wire sizes (29-20 AWG)
Dimensions: 45x34.5x8.5mm
Color: Black, white,blue,green, red,yellow

Description
Mini Solderless Breadboard
1 Terminal Strip
Tie-point 170
ABS plastic material
Completely reusable
Coloured coordinates for easy component placement
Phosphor bronze nickel plated spring clips
Accepts a variety of wire sizes (29-20 AWG)
Dimensions: 45x34.5x8.5mm
Color: Black, white,blue,green, red,yellow

Description
Mini Solderless Breadboard
1 Terminal Strip
Tie-point 170
ABS plastic material
Completely reusable
Coloured coordinates for easy component placement
Phosphor bronze nickel plated spring clips
Accepts a variety of wire sizes (29-20 AWG)
Dimensions: 45x34.5x8.5mm
Color: Black, white,blue,green, red,yellow

Description
Mini Solderless Breadboard
1 Terminal Strip
Tie-point 170
ABS plastic material
Completely reusable
Coloured coordinates for easy component placement
Phosphor bronze nickel plated spring clips
Accepts a variety of wire sizes (29-20 AWG)
Dimensions: 45x34.5x8.5mm
Color: Black, white,blue,green, red,yellow

Description
Mini Solderless Breadboard
1 Terminal Strip
Tie-point 170
ABS plastic material
Completely reusable
Coloured coordinates for easy component placement
Phosphor bronze nickel plated spring clips
Accepts a variety of wire sizes (29-20 AWG)
Dimensions: 45x34.5x8.5mm
Color: Black, white,blue,green, red,yellow

Description
Mini Solderless Breadboard
1 Terminal Strip
Tie-point 170
ABS plastic material
Completely reusable
Coloured coordinates for easy component placement
Phosphor bronze nickel plated spring clips
Accepts a variety of wire sizes (29-20 AWG)
Dimensions: 45x34.5x8.5mm
Color: Black, white,blue,green, red,yellow

Product Description
100% brand new and high quality
Material: Electrical Components
Color: See pictures
Features:
You want to make a robot, When we saw this chip, we quickly realized what an excellent add-on this would be.
Using only two pins, control 16 free-running PWM outputs!
I2C input, control 16 PWM output, you can control the 16 way servo motor.
Specifications:
Frequency: 40-1000Hz.
Channel number: 16 channel.
Resolution: 12 bit.
Voltage: DC 5-10V
Size: 60*25mm/2.36"*0.98"
No retail package
Quantity:1Pc
Note: Due to the difference between different monitors, the picture may not reflect the actual color of the item. Thank you!!

Product Description
1. Chip: KA2284;

2. Supply voltage: 3.5V-12V;

3. The magnitude of the level can be adjusted;

4. AC and DC signals can be controlled by jumper;

5. PCB board size: 29 (mm) x21 (mm);

Product Description
1602 LCD:
LCD display module with blue/Green/White blacklight.
Wide viewing angle and high contrast.
Built-in industry standard HD44780 equivalent LCD controller.
Commonly used in: copiers, fax machines, laser printers, industrial test equipment, networking equipment such as routers and
storage devices.
LCM type: Character
Can display 2-lines X 16-characters.
Voltage: 5V DC.
Module dimension: 80mm x 35mm x 11mm.
Viewing area size: 64.5mm x 16mm
IIC
1602 I2C interface 4-wire 1602 screen
IO port of Arduino control board is only 20,so IO ports is not enough for many sensor, SD card, relay modules.
The original 1602 screen need 7 IO ports to drive up, and this module can save 5 IO ports

Product Description
1602 LCD:
LCD display module with blue/Green/White blacklight.
Wide viewing angle and high contrast.
Built-in industry standard HD44780 equivalent LCD controller.
Commonly used in: copiers, fax machines, laser printers, industrial test equipment, networking equipment such as routers and
storage devices.
LCM type: Character
Can display 2-lines X 16-characters.
Voltage: 5V DC.
Module dimension: 80mm x 35mm x 11mm.
Viewing area size: 64.5mm x 16mm
IIC
1602 I2C interface 4-wire 1602 screen
IO port of Arduino control board is only 20,so IO ports is not enough for many sensor, SD card, relay modules.
The original 1602 screen need 7 IO ports to drive up, and this module can save 5 IO ports

Product Description
1602 LCD:
LCD display module with blue/Green/White blacklight.
Wide viewing angle and high contrast.
Built-in industry standard HD44780 equivalent LCD controller.
Commonly used in: copiers, fax machines, laser printers, industrial test equipment, networking equipment such as routers and
storage devices.
LCM type: Character
Can display 2-lines X 16-characters.
Voltage: 5V DC.
Module dimension: 80mm x 35mm x 11mm.
Viewing area size: 64.5mm x 16mm
IIC
1602 I2C interface 4-wire 1602 screen
IO port of Arduino control board is only 20,so IO ports is not enough for many sensor, SD card, relay modules.
The original 1602 screen need 7 IO ports to drive up, and this module can save 5 IO ports

Product Description
1602 LCD:
LCD display module with blue/Green/White blacklight.
Wide viewing angle and high contrast.
Built-in industry standard HD44780 equivalent LCD controller.
Commonly used in: copiers, fax machines, laser printers, industrial test equipment, networking equipment such as routers and
storage devices.
LCM type: Character
Can display 2-lines X 16-characters.
Voltage: 5V DC.
Module dimension: 80mm x 35mm x 11mm.
Viewing area size: 64.5mm x 16mm
IIC
1602 I2C interface 4-wire 1602 screen
IO port of Arduino control board is only 20,so IO ports is not enough for many sensor, SD card, relay modules.
The original 1602 screen need 7 IO ports to drive up, and this module can save 5 IO ports

5pcs/lot FR4 Fiberglass Board 10*15cm 1.5MM Thick PCB Single Side Prototype Board diy Laminate Printed Circuit Electronic Board

Description
The working voltage of single-chip microcomputer and equipment is 3.3V, and some single-chip microcomputers and equipment, sensors have 5.0V working voltage; when the two need to communicate, the working voltage is inconsistent; the module provides feasible in different devices of 3.3V and 5.0V Sex has played a bridging role.

Features:
(1) One-way conversion of high-voltage logic to low-voltage logic
(2) The module is compatible with breadboards and can be directly plugged into the breadboard for use
(3) Realize the direct 5V and 3.3V level communication of the serial port
(4) The highest stable communication baud rate is 28800bps
Product compatibility:
(1) AVCC connects to 5V system power supply
(2) ASCL connects to 5V system SCL
(3) ASDA connects to 5V system SDA
(4) AGND connects to 5V system GND
(5) BVCC connects to 3.3V system power supply
(6) BSCL connects to 3.3V system SCL
(7) BSDA connects to 3.3V system SDA
(8) Connect BGND to 3.3V system GND
This module can only convert the 5V voltage of channel A into 3.3V of channel B, but cannot convert the 3.3V voltage of channel B into 5V voltage of channel A.

Description:
1  L9110S-chip motor drive
2 Module supply voltage: 2.5-12V
3 Suitable Motor range: between motor operating voltage 2.5v-12V, the maximum operating current of 0.8A, the current smart car voltage and current market are within this range
4 Drive two DC motors, or a 4-wire 2-phase stepping motor.
5 PCB board size: 2.8cm * 2.1cm ultra-small size, suitable for assembly
6 Is provided with a fixed mounting holes, diameter: 3mm
modules Interfaces:
6P black bent pin description:
1 VCC external voltage 2.5V-12V
2 GND External GND
3 AIA external microcontroller IO port
4 AIB external microcontroller IO port
5 BIA external microcontroller IO port
6 BIB external microcontroller IO port
4P green terminal:
1 OA1 OB1 contact DC 2-pin, non-directional
2 OA2 OB2 contact DC 2-pin, non-directional
Use:
ON VCC, GND module power indicator light
AIA input high, AIB input low, [OA1 OB1] motor is transferred;
AIA input low, AIB input high, [OA1 OB1] motor reversal;
BIA input high, BIB input low,] [OA2 OB2 motor is transferred;
BIA input low, BIB input high,] [OA2 OB2 motor reversal;
Package includes:
1 x L9110S H-bridge Stepper Motor Dual DC motor Driver Controller Board

Features:
1. The knob monochromatic dimmer is a kind of controller which can realize the stepless dimming.
2. Using the control mode of the knob, it is a kind of dimmer that can realize 0-100% no pole dimming, and the user can adjust the light to the appropriate brightness according to the actual needs.
3. It is used to control all kinds of lamps and lanterns with LED as light source, such as LED, LED module, LED lamp string etc.
4. Application scenarios: urban lighting, holiday atmosphere, KTV, gym, car lights, etc.
Specifications:
Working temperature: -20-60℃
Power supply voltage: 12V-24V
Output: Single loop
Static power: <1W
Maximum load current: 8A
Output power: 12V<96W, 24V<192W
Product size: approx. 89*60*48mm/3.5*2.36*1.88''
Note:
Please allow 1-3cm differs due to manual measurement.
Due to the different display and different light, the picture may not show the actual color of the item. Thanks for your understanding.

Pam8403 with Switch
PAM8403 small mini 5 v digital power amplifier board (can be USB powered) (XY) board USES PAM8403 digital power amplifier chip, circuit is simple, reliable work.Working voltage of 2.5 V to 2.5 V, 3 wx2 maximum output, efficiency can achieve 90% above, can use computer USB 5 V power supply, is very suitable for battery and portable electronic products.Bat small size, and is equipped with switch, potentiometer, can follow one's inclinations of the volume, and control the power switch to use and install is very flexible and convenient.Using devices all use the real thing, can be competent for long-term stability.
Operating voltage: 2.5 V to 2.5 V
Maximum output: 3 wx2 (5 v 4 o)
Board size: about 22 mm 30 mm wide/deep/high 16 mm excluding potentiometer handle bulge (dimension) boards are finished plate welding test, the above potentiometer is with switch, can control the volume and power switch, not more than 5.5 V, working voltage power supply positive and negative don't wrong, otherwise the chip has the potential to damage.

PAM8403 Green
1, 2 * 3 w miniature digital power amplifier board class D power supply can use the computer?
Answer: power amplifier board can use a computer power supply, but will produce noise may be produced (also some customers did not appear murmurs), the best advice of independent power supply.
2, miniature digital 2 * 3 w class D power amplifier boards with the speaker of the house is good?
Answer: our speaker is only provide DIY players try, sound is not particularly good, if the pursuit of high sound client can buy separately.
3, 2 * 3 w miniature digital power amplifier board class D why there are noise after power on the speaker?
The answer:
1, appear whistlers, should be the audio input line, the introduction of shielded wire should be used for audio input line, and then there is audio input line don't hung up to connect good audio source.
2, is a kind of reason may be that some power supply is bad interference is very big, switch power supply.
Customer common problems:
1, 2 * 3 w miniature digital power amplifier board class D power supply can use the computer?
Answer: power amplifier board can use a computer power supply, but will produce noise may be produced (also some customers did not appear murmurs), the best advice of independent power supply.
2, miniature digital 2 * 3 w class D power amplifier boards with the speaker of the house is good?
Answer: our speaker is only provide DIY players try, sound is not particularly good, if the pursuit of high sound client can buy separately.
3, 2 * 3 w miniature digital power amplifier board class D why there are noise after power on the speaker?
The answer:
1, appear whistlers, should be the audio input line, the introduction of shielded wire should be used for audio input line, and then there is audio input line don't hung up to connect good audio source.
2, is a kind of reason may be that some power supply is bad interference is very big, switch power supply.
Good noise suppression, under the condition of the connected input audio, ears also can't hear any noise on the speaker, dual channel stereo, 5 v power supply can output 3 w 3 w power, can be directly driven 4 Ω, 8 Ω small speakers, big output power, energy, sound quality is good. Unique without LC filter class D digital power board, can use computer USB power supply directly. Double panel wiring, properly solve wiring caused by potential balance and crosstalk between channels, super mini design, can be easily placed in a variety of digital products within a small space, high amplification efficiency. Are all made of solid plate welding machine, welding quality of the manual soldering iron welding comparable!

Pam8403 Red
Power supply: DC 1A (DC): 5V
Output power: 3W 3W (4 ohms)
SNR: 90dB
Efficiency:> 90%
Size: 24 * 15.5 * mm positioning hole size: 20mm aperture spacing: 2mm
"Note":
1: positive and negative power supply can not be reversed, the power supply voltage can not exceed 5.5V, these two violations could result in IC damage.
2: on-chip high-gain buffer, the board can not change any component parameters do not meet the parameters will result in IC damage.
3: Try using the line input cable with shielded, can play a role in immunity, eliminate clutter current sound.
4: cmos pipe BTL output drive mode, the speaker can not be negative about together, connect-4 speaker wire is completely independent, does not allow total access!

Pam8403 with Switch
PAM8403 small mini 5 v digital power amplifier board (can be USB powered) (XY) board USES PAM8403 digital power amplifier chip, circuit is simple, reliable work.Working voltage of 2.5 V to 2.5 V, 3 wx2 maximum output, efficiency can achieve 90% above, can use computer USB 5 V power supply, is very suitable for battery and portable electronic products.Bat small size, and is equipped with switch, potentiometer, can follow one's inclinations of the volume, and control the power switch to use and install is very flexible and convenient.Using devices all use the real thing, can be competent for long-term stability.
Operating voltage: 2.5 V to 2.5 V
Maximum output: 3 wx2 (5 v 4 o)
Board size: about 22 mm 30 mm wide/deep/high 16 mm excluding potentiometer handle bulge (dimension) boards are finished plate welding test, the above potentiometer is with switch, can control the volume and power switch, not more than 5.5 V, working voltage power supply positive and negative don't wrong, otherwise the chip has the potential to damage.

PAM8403 Green
1, 2 * 3 w miniature digital power amplifier board class D power supply can use the computer?
Answer: power amplifier board can use a computer power supply, but will produce noise may be produced (also some customers did not appear murmurs), the best advice of independent power supply.
2, miniature digital 2 * 3 w class D power amplifier boards with the speaker of the house is good?
Answer: our speaker is only provide DIY players try, sound is not particularly good, if the pursuit of high sound client can buy separately.
3, 2 * 3 w miniature digital power amplifier board class D why there are noise after power on the speaker?
The answer:
1, appear whistlers, should be the audio input line, the introduction of shielded wire should be used for audio input line, and then there is audio input line don't hung up to connect good audio source.
2, is a kind of reason may be that some power supply is bad interference is very big, switch power supply.
Customer common problems:
1, 2 * 3 w miniature digital power amplifier board class D power supply can use the computer?
Answer: power amplifier board can use a computer power supply, but will produce noise may be produced (also some customers did not appear murmurs), the best advice of independent power supply.
2, miniature digital 2 * 3 w class D power amplifier boards with the speaker of the house is good?
Answer: our speaker is only provide DIY players try, sound is not particularly good, if the pursuit of high sound client can buy separately.
3, 2 * 3 w miniature digital power amplifier board class D why there are noise after power on the speaker?
The answer:
1, appear whistlers, should be the audio input line, the introduction of shielded wire should be used for audio input line, and then there is audio input line don't hung up to connect good audio source.
2, is a kind of reason may be that some power supply is bad interference is very big, switch power supply.
Good noise suppression, under the condition of the connected input audio, ears also can't hear any noise on the speaker, dual channel stereo, 5 v power supply can output 3 w 3 w power, can be directly driven 4 Ω, 8 Ω small speakers, big output power, energy, sound quality is good. Unique without LC filter class D digital power board, can use computer USB power supply directly. Double panel wiring, properly solve wiring caused by potential balance and crosstalk between channels, super mini design, can be easily placed in a variety of digital products within a small space, high amplification efficiency. Are all made of solid plate welding machine, welding quality of the manual soldering iron welding comparable!

Pam8403 Red
Power supply: DC 1A (DC): 5V
Output power: 3W 3W (4 ohms)
SNR: 90dB
Efficiency:> 90%
Size: 24 * 15.5 * mm positioning hole size: 20mm aperture spacing: 2mm
"Note":
1: positive and negative power supply can not be reversed, the power supply voltage can not exceed 5.5V, these two violations could result in IC damage.
2: on-chip high-gain buffer, the board can not change any component parameters do not meet the parameters will result in IC damage.
3: Try using the line input cable with shielded, can play a role in immunity, eliminate clutter current sound.
4: cmos pipe BTL output drive mode, the speaker can not be negative about together, connect-4 speaker wire is completely independent, does not allow total access!

Pam8403 with Switch
PAM8403 small mini 5 v digital power amplifier board (can be USB powered) (XY) board USES PAM8403 digital power amplifier chip, circuit is simple, reliable work.Working voltage of 2.5 V to 2.5 V, 3 wx2 maximum output, efficiency can achieve 90% above, can use computer USB 5 V power supply, is very suitable for battery and portable electronic products.Bat small size, and is equipped with switch, potentiometer, can follow one's inclinations of the volume, and control the power switch to use and install is very flexible and convenient.Using devices all use the real thing, can be competent for long-term stability.
Operating voltage: 2.5 V to 2.5 V
Maximum output: 3 wx2 (5 v 4 o)
Board size: about 22 mm 30 mm wide/deep/high 16 mm excluding potentiometer handle bulge (dimension) boards are finished plate welding test, the above potentiometer is with switch, can control the volume and power switch, not more than 5.5 V, working voltage power supply positive and negative don't wrong, otherwise the chip has the potential to damage.

PAM8403 Green
1, 2 * 3 w miniature digital power amplifier board class D power supply can use the computer?
Answer: power amplifier board can use a computer power supply, but will produce noise may be produced (also some customers did not appear murmurs), the best advice of independent power supply.
2, miniature digital 2 * 3 w class D power amplifier boards with the speaker of the house is good?
Answer: our speaker is only provide DIY players try, sound is not particularly good, if the pursuit of high sound client can buy separately.
3, 2 * 3 w miniature digital power amplifier board class D why there are noise after power on the speaker?
The answer:
1, appear whistlers, should be the audio input line, the introduction of shielded wire should be used for audio input line, and then there is audio input line don't hung up to connect good audio source.
2, is a kind of reason may be that some power supply is bad interference is very big, switch power supply.
Customer common problems:
1, 2 * 3 w miniature digital power amplifier board class D power supply can use the computer?
Answer: power amplifier board can use a computer power supply, but will produce noise may be produced (also some customers did not appear murmurs), the best advice of independent power supply.
2, miniature digital 2 * 3 w class D power amplifier boards with the speaker of the house is good?
Answer: our speaker is only provide DIY players try, sound is not particularly good, if the pursuit of high sound client can buy separately.
3, 2 * 3 w miniature digital power amplifier board class D why there are noise after power on the speaker?
The answer:
1, appear whistlers, should be the audio input line, the introduction of shielded wire should be used for audio input line, and then there is audio input line don't hung up to connect good audio source.
2, is a kind of reason may be that some power supply is bad interference is very big, switch power supply.
Good noise suppression, under the condition of the connected input audio, ears also can't hear any noise on the speaker, dual channel stereo, 5 v power supply can output 3 w 3 w power, can be directly driven 4 Ω, 8 Ω small speakers, big output power, energy, sound quality is good. Unique without LC filter class D digital power board, can use computer USB power supply directly. Double panel wiring, properly solve wiring caused by potential balance and crosstalk between channels, super mini design, can be easily placed in a variety of digital products within a small space, high amplification efficiency. Are all made of solid plate welding machine, welding quality of the manual soldering iron welding comparable!

Pam8403 Red
Power supply: DC 1A (DC): 5V
Output power: 3W 3W (4 ohms)
SNR: 90dB
Efficiency:> 90%
Size: 24 * 15.5 * mm positioning hole size: 20mm aperture spacing: 2mm
"Note":
1: positive and negative power supply can not be reversed, the power supply voltage can not exceed 5.5V, these two violations could result in IC damage.
2: on-chip high-gain buffer, the board can not change any component parameters do not meet the parameters will result in IC damage.
3: Try using the line input cable with shielded, can play a role in immunity, eliminate clutter current sound.
4: cmos pipe BTL output drive mode, the speaker can not be negative about together, connect-4 speaker wire is completely independent, does not allow total access!

Description:
1. The product is used for charging / discharging 3 series lithium batteries (lithium ion or lithium polymer batteries).
2. In the process of charging and discharging, it has the functions of over charging protection, over discharging protection, over current protection and short circuit protection, which can be used at ease.
3. In life, the common products that can be used to it are: vacuum cleaner, massager battery pack; LED lamp backup power supply, solar street lamp battery pack; monitoring backup power supply and other products.
Specification:
Product model: HW-533
Size: 50 * 16 * 1mm/1.96*0.62*0.03''
Charging voltage: 12.6V-13V
Maximum working current: 10A
Overcurrent protection: 25A
Static current: less than 6uA
Internal resistance: less than 60mΩ
Overcharge voltage range: 4.25-4.35v ± 0.05v
Over discharge voltage range: 2.7-3.0v ± 0.05v
Working temperature: - 40 - 50 ℃
Storage conditions: - 40 - 80 ℃
Effective life: more than 30000 hours
Warm Tips:
Calculation of charging and discharging current of lithium battery:
When using the module, you may encounter the situation of estimating the maximum charge and discharge current of the battery.
The following describes the calculation formula of the maximum charge and discharge current of lithium battery. The calculation formula is: maximum charge and discharge current = rated capacity * C. For example, if a lithium battery has a nominal capacity of 2200mAh and a discharge rate of 2C, its discharge current is 2200 * 2 = 4400maA = 4.4A.
Note:
Please allow 1-3mm differs due to manual measurement.
Due to the different display and different light, the picture may not show the actual color of the item. Thanks for your understanding.

Introduction
Dimension: 5x7 4x6 3x7 2x8 cm
Material : double Side Copper PCB
Hole Dia:about 1mm
Hole pitch : standard 2.54mm
Quantity :4pcs
for point to point DIY soldering
Package include:
1pcs 2x8cm PCB
1pcs 3X7cm PCB
1pcs 4x6cm PCB
1pcs 5x7cm PCB

Detailed introduction:
40pcs 10cm 2.54mm 1pin Female to Female jumper wire Dupont cable
2.54mm 1pin
Female to Female
Length:10cm
Qty:40pcs(40pcs x 1)
40pcs 10cm 2.54mm 1pin Male to Female jumper wire Dupont cable
2.54mm 1pin
Male to Female
Length:10cm
Qty:40pcs(40pcs x 1)
40pcs 10cm 2.54mm 1pin Male to Male jumper wire Dupont cable
2.54mm 1pin
Male to Male
Length:10cm
Qty:40pcs(40pcs x 1)
10cm 3kinds 120pcs

Detailed introduction:
40pcs 10cm 2.54mm 1pin Female to Female jumper wire Dupont cable
2.54mm 1pin
Female to Female
Length:10cm
Qty:40pcs(40pcs x 1)
40pcs 10cm 2.54mm 1pin Male to Female jumper wire Dupont cable
2.54mm 1pin
Male to Female
Length:10cm
Qty:40pcs(40pcs x 1)
40pcs 10cm 2.54mm 1pin Male to Male jumper wire Dupont cable
2.54mm 1pin
Male to Male
Length:10cm
Qty:40pcs(40pcs x 1)
10cm 3kinds 120pcs

Detailed introduction:
40pcs 10cm 2.54mm 1pin Female to Female jumper wire Dupont cable
2.54mm 1pin
Female to Female
Length:10cm
Qty:40pcs(40pcs x 1)
40pcs 10cm 2.54mm 1pin Male to Female jumper wire Dupont cable
2.54mm 1pin
Male to Female
Length:10cm
Qty:40pcs(40pcs x 1)
40pcs 10cm 2.54mm 1pin Male to Male jumper wire Dupont cable
2.54mm 1pin
Male to Male
Length:10cm
Qty:40pcs(40pcs x 1)
10cm 3kinds 120pcs

Detailed introduction:
40pcs 10cm 2.54mm 1pin Female to Female jumper wire Dupont cable
2.54mm 1pin
Female to Female
Length:10cm
Qty:40pcs(40pcs x 1)
40pcs 10cm 2.54mm 1pin Male to Female jumper wire Dupont cable
2.54mm 1pin
Male to Female
Length:10cm
Qty:40pcs(40pcs x 1)
40pcs 10cm 2.54mm 1pin Male to Male jumper wire Dupont cable
2.54mm 1pin
Male to Male
Length:10cm
Qty:40pcs(40pcs x 1)
10cm 3kinds 120pcs

Product Description
Size: 35*30(MM)
Adjustable frequency
Over current short circuit shut off self-locking
The output voltage can be regulated, and the effect is good!
The output current can reach about 1A, driving 20 3205 effect tubes is no problem
Power supply 8-12V
If the product is updated, no notice will be given unless the function is changed! Pin description
1. Positive power supply
2. Signal output
3. The negative pole of the power supply
4. Signal output
5. Optocoupler input anode
6. Optocoupler output negative
7, signal off short foot
8. Signal feedback pin

Uses:
Various flame, fire detection
Module Features:
One can detect a flame or in a 760 nanometer wavelength of ~ 1100 nm range of the light, lighter flame test distance of 80cm, for the greater flame, the farther the distance test
2, the detection angle of 60 degrees or so, particularly sensitive to the flame spectrum
3, sensitivity adjustable (shown in blue digital potentiometer adjustment)
4, the comparator output signal clean, good waveform, driving ability, more than 15mA
5, with adjustable precision potentiometer sensitivity adjustment
6, the working voltage of 3.3V-5V
7, the output format: digital switching outputs (0 and 1)
8, a fixed bolt holes for easy installation
9, small plates PCB Size: 3.2cm x 1.4cm
10, using a wide voltage LM393 comparator
Module for use:
1, the flame sensor flame most sensitive to ordinary light is also a rection, generally used as a flame alarm purposes.
2, a small plate output interface can be directly connected to the microcontroller IO port
3, with the flame sensor to maintain a certain distance, so as not to damage the sensor temperature, the flame of a lighter test distance 80cm, for the greater flame, the farther the distance test

Description
The sensor module has strong adaptability to ambient light. It has a pair of infrared emitting and receiving tubes. The emitting tube emits a certain frequency of infrared rays. When the detection direction encounters an obstacle (reflecting surface), the infrared rays are reflected back and received by the receiving tube. After being processed by the comparator circuit, the green indicator light will light up, and the signal output interface will output a digital signal (a low-level signal). The detection distance can be adjusted by the potentiometer knob. The effective distance range is 2-30cm, and the working voltage is 3.3V- 5V. The detection distance of the sensor can be adjusted by a potentiometer, has the characteristics of low interference, easy assembly, and convenient use. It can be widely used in many occasions such as robot obstacle avoidance, obstacle avoidance trolley, assembly line counting and black and white line tracking. Module parameter description 1 When the module detects the front obstacle signal, the green indicator light on the circuit board lights up, and the OUT port continues to output low-level signals. The module has a detection distance of 2～30cm, a detection angle of 35°, and the detection distance can pass the potential Adjust the potentiometer clockwise to increase the detection distance; adjust the potentiometer counterclockwise to decrease the detection distance. 2. The sensor takes active infrared reflection detection, so the reflectivity and shape of the target are the key to the detection distance. Among them, the black detection distance is the smallest, and the white is the largest; the distance of a small area is small, and the distance of a large area is large. 3. The output port OUT of the sensor module can be directly connected to the IO port of the single-chip microcomputer, or can directly drive a 5V relay; connection mode: VCC-VCC; GND-GND; OUT-IO 4. The comparator adopts LM393, which works stably; 5. 3-5V DC power supply can be used to power the module. When the power is turned on, the red power indicator lights up; 6. With 3mm screw holes, easy to fix and install; 7. Circuit board size: 3.2CM*1.4CM 8. The threshold comparison voltage of each module has been adjusted through the potentiometer before delivery. Please do not adjust the potentiometer at will if it is not a special case. Module interface description 1 VCC external 3.3V-5V voltage (can be directly connected with 5v microcontroller and 3.3v microcontroller) 2 GND External GND 3 OUT Small board digital output interface (0 and 1)

Introduction
Dimension: 5x7 4x6 3x7 2x8 cm
Material : double Side Copper PCB
Hole Dia:about 1mm
Hole pitch : standard 2.54mm
for point to point DIY soldering

Introduction
Dimension: 5x7 4x6 3x7 2x8 cm
Material : double Side Copper PCB
Hole Dia:about 1mm
Hole pitch : standard 2.54mm
for point to point DIY soldering

Introduction
Dimension: 5x7 4x6 3x7 2x8 cm
Material : double Side Copper PCB
Hole Dia:about 1mm
Hole pitch : standard 2.54mm
for point to point DIY soldering

Introduction
Dimension: 5x7 4x6 3x7 2x8 cm
Material : double Side Copper PCB
Hole Dia:about 1mm
Hole pitch : standard 2.54mm
for point to point DIY soldering

Introduction
Durable and easy to install
Very convenient and practical
Very popular among the electronic lovers
Very easy to adjust voltage and electric current
Come with cap,very easy to use
Model Number:
B1K 2K 5K 10K 20K 50K 100K 250K 500K 1M Shaft WH148 Potentiometer each 1pc
Note:The color of the cap is sent randomly

Description:
Size: 5mm/3mm
Length: 37mm.
Emitted Colour : Infrared.
Lens Color : Black/Clear.
wavelength: 940nm.
Forward Voltage (V) : 1.2-1.4V.
Forward Current (mA): 100mA.
Transmitting and receiving distance: about 7 - 8 M.

Description:
Size: 5mm/3mm
Length: 37mm.
Emitted Colour : Infrared.
Lens Color : Black/Clear.
wavelength: 940nm.
Forward Voltage (V) : 1.2-1.4V.
Forward Current (mA): 100mA.
Transmitting and receiving distance: about 7 - 8 M.

Description:
Size: 5mm/3mm
Length: 37mm.
Emitted Colour : Infrared.
Lens Color : Black/Clear.
wavelength: 940nm.
Forward Voltage (V) : 1.2-1.4V.
Forward Current (mA): 100mA.
Transmitting and receiving distance: about 7 - 8 M.

Description:
Size: 5mm/3mm
Length: 37mm.
Emitted Colour : Infrared.
Lens Color : Black/Clear.
wavelength: 940nm.
Forward Voltage (V) : 1.2-1.4V.
Forward Current (mA): 100mA.
Transmitting and receiving distance: about 7 - 8 M.

Description:
Size: 5mm/3mm
Length: 37mm.
Emitted Colour : Infrared.
Lens Color : Black/Clear.
wavelength: 940nm.
Forward Voltage (V) : 1.2-1.4V.
Forward Current (mA): 100mA.
Transmitting and receiving distance: about 7 - 8 M.

Description:
Size: 5mm/3mm
Length: 37mm.
Emitted Colour : Infrared.
Lens Color : Black/Clear.
wavelength: 940nm.
Forward Voltage (V) : 1.2-1.4V.
Forward Current (mA): 100mA.
Transmitting and receiving distance: about 7 - 8 M.

24Values TO-92 Transistor 20 Of Each Type BC327 BC337 BC517 BC547 BC548 BC549 2N2222 Transistors Set Electronics Assortment Kit
•BC327 PNP - 20pcs
• BC337 NPN - 20pcs
• BC517 NPN - 20pcs
• BC547 NPN - 20pcs
• BC548 NPN - 20pcs
• BC549 NPN - 20pcs
• BC550 NPN - 20pcs
• BC556 PNP - 20pcs
• BC557 PNP - 20pcs
• BC558 PNP - 20pcs
• 2N2222 NPN - 20pcs
• 2N3904 NPN - 20pcs
• 2N3906 PNP - 20pcs
• 2N5401 PNP - 20pcs
• 2N5551 NPN - 20pcs
• A1015 PNP - 20pcs
• C1815 NPN - 20pcs
• C945 NPN - 20pcs
• S8050 NPN - 20pcs
• S8550 PNP - 20pcs
• S9012 PNP - 20pcs
• S9013 PNP - 20pcs
• S9014 NPN - 20pcs
• S9015 PNP - 20pcs

Product Description
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