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LM2596S DC-DC 3.6-46V 3A adjustable step-down power Supply module With reverse connection protection 5V voltage regulator
LM2596S upgrade!Increase the input with reverse connection protection, plus or minus the reverse would not burn module, strengthen the quality of the inductance, increase the service life of the product!
 
Specifications:
Module property:Non-isolation buck
Rectification mode:Non-synchronous rectifier
Input voltage:3.6V-46V
Output voltage:1.25V-35V
Output current:Rated current is 3A,
Conversion efficiency:92% ( highest )
Switching frequency:65KHz
Output ripple:30mV( maximum )
Load regulation:±0.5%
Voltage regulation:± 2.5%
Work temperature:-Minus 40 degrees - 85 degrees
dimension:43mm*21mm*14mm(L*W*G)
 
Using the tutorial:
1. Plugged into a power supply (3-40 v), the power indicator light is lit, the module to work properly.
2. Adjust the blue potentiometer knob (generally booster clockwise, counterclockwise step-down) with a multimeter monitoring the output voltage to the voltage.

 

 

 
 

Product name                              

ATX power supply board
 

Model

XH - M229
 

Compatible with the port

ATX (compatible with partial BTX type)
 

The PIN number

24 pin
 

Switch

Yes
 

Number of sets of output

Four sets of different voltages
 

Size

48 * 128 * 30 mm
 

100PCS 1N4001 1N4004 1N4007 1N5408 1N5819 1N5822 FR107 FR207 DO-41 Rectifier Diode

76-108MHz DIY Kit FM Radio Transmitter and Receiver Module Frequency Modulation Stereo Receiving PCB Circuit Board
Description:
1. Model: RF-02FM
2. Operating Current: 5-15mA
3. Operating Voltage: DC 3-6V
4. Transmission Distance: 5-50m
5. Transmission Frequency: 88-108MHz
6. Audio Input: -15dB (max)
7. PCB Size: 53*40mm
76-108MHz FM Stereo Radio DIY Kit Wireless FM Receiver Module Frequency Modulation Electronics Soldering Practice Project DC 2.7V-3.3V
Note: Please don't use 18650 battery, if not it will damage the item.
Description:
- The YFM-2 type radio circuit is very simple.
- The total number of components does not exceed 19.
- Although the number of components is not large, it includes two types of components: SMD and DIP which are suitable for novices and friends who want to practice soldering of SMD components.
Features:
1>.Built-in digital automatic gain control (AGC) circuit
2>.Support the global frequency band 76-108Mhz
3>.DIY manual welding
4>.Simple and easy to operate
5>.Support radio memory function
Parameter:
1>.Item name: FM Stereo Radio Module DIY Kit
2>.Item Mode:YFM-2
3>.Work Voltage:DC 3V
4>.Work Current:19mA
5>.Work Frequency:76-108Mhz
6>.Output impedance:32ohm
7>.Work Temperature:-40℃~85℃
8>.Work Humidity:0% ~95% RH
9>.Size(Installed):57*32*20mm
Applicable:
1>.Training welding skills
2>.Student school
3>.DIY production
4>.Project Design
5>.Electronic competition
6>.Graduation design
7>.Crafts collection
8>.Home decoration
9>.Souvenir collection
Installation Tips:
1>.User needs to prepare the welding tool at first.
2>.Please be patient until the installation is complete.
3>.The package is DIY kit.It need finish install by user.
4>.The soldering iron can't touch the components for a long time(1.0 second), otherwise it will damage the components.
5>.Pay attention to the positive and negative of the components.
6>.Strictly prohibit short circuit.
7>.Install complex components preferentially.
8>.Make sure all components are in right direction and right place.
9>.It is strongly recommended to read the installation manual before starting installation!!!
Installation Steps(Please be patient install!!!):
1>.Step 1: Install 1pcs SOP-16 RDA5807PF at U1.There is a dot on one corner of the IC and there is a rectangle pad on PCB where the Pin1 of IC can place on.These two marks are corresponding to each other and are used to specify the installation direction of the IC.
2>.Step 2: Install 1pcs 30K ohm Resistor at R1.
3>.Step 3: Install 1pcs 0.1uH Inductor at L1.
4>.Step 4: Install 2pcs 1uH Inductor at L2,L3.
5>.Step 5: Install 1pcs 32.768KHz Crystal Oscillator at Y1.
6>.Step 6: Install 1pcs 24pF Ceramic Capacitor at C1.
7>.Step 7: Install 1pcs 0.01pF(103) Ceramic Capacitor at C2.
8>.Step 8: Install 1pcs 0.022pF(223) Ceramic Capacitor at C3.
9>.Step 9: Install 5pcs 6*6*5mm Switch at S1-S5.
10>.Step 10: Install 1pcs 100uF 16V Electrolytic Capacitor at C4,C5. Please pay attention to the positive and negative poles. The shorter pin is the negative pole.
11>.Step 11: Install 1pcs 3.5mm Audio Jack at J1.
12>.Step 12: Connect battery box.Pay attention to positive and negative.
13>.Step 13: Use a cable tie to fasten the battery box.
14>.Step 14: Connect to power supply and enjoy the effect.

76-108MHz DIY Kit FM Radio Transmitter and Receiver Module Frequency Modulation Stereo Receiving PCB Circuit Board
Description:
1. Model: RF-02FM
2. Operating Current: 5-15mA
3. Operating Voltage: DC 3-6V
4. Transmission Distance: 5-50m
5. Transmission Frequency: 88-108MHz
6. Audio Input: -15dB (max)
7. PCB Size: 53*40mm
76-108MHz FM Stereo Radio DIY Kit Wireless FM Receiver Module Frequency Modulation Electronics Soldering Practice Project DC 2.7V-3.3V
Note: Please don't use 18650 battery, if not it will damage the item.
Description:
- The YFM-2 type radio circuit is very simple.
- The total number of components does not exceed 19.
- Although the number of components is not large, it includes two types of components: SMD and DIP which are suitable for novices and friends who want to practice soldering of SMD components.
Features:
1>.Built-in digital automatic gain control (AGC) circuit
2>.Support the global frequency band 76-108Mhz
3>.DIY manual welding
4>.Simple and easy to operate
5>.Support radio memory function
Parameter:
1>.Item name: FM Stereo Radio Module DIY Kit
2>.Item Mode:YFM-2
3>.Work Voltage:DC 3V
4>.Work Current:19mA
5>.Work Frequency:76-108Mhz
6>.Output impedance:32ohm
7>.Work Temperature:-40℃~85℃
8>.Work Humidity:0% ~95% RH
9>.Size(Installed):57*32*20mm
Applicable:
1>.Training welding skills
2>.Student school
3>.DIY production
4>.Project Design
5>.Electronic competition
6>.Graduation design
7>.Crafts collection
8>.Home decoration
9>.Souvenir collection
Installation Tips:
1>.User needs to prepare the welding tool at first.
2>.Please be patient until the installation is complete.
3>.The package is DIY kit.It need finish install by user.
4>.The soldering iron can't touch the components for a long time(1.0 second), otherwise it will damage the components.
5>.Pay attention to the positive and negative of the components.
6>.Strictly prohibit short circuit.
7>.Install complex components preferentially.
8>.Make sure all components are in right direction and right place.
9>.It is strongly recommended to read the installation manual before starting installation!!!
Installation Steps(Please be patient install!!!):
1>.Step 1: Install 1pcs SOP-16 RDA5807PF at U1.There is a dot on one corner of the IC and there is a rectangle pad on PCB where the Pin1 of IC can place on.These two marks are corresponding to each other and are used to specify the installation direction of the IC.
2>.Step 2: Install 1pcs 30K ohm Resistor at R1.
3>.Step 3: Install 1pcs 0.1uH Inductor at L1.
4>.Step 4: Install 2pcs 1uH Inductor at L2,L3.
5>.Step 5: Install 1pcs 32.768KHz Crystal Oscillator at Y1.
6>.Step 6: Install 1pcs 24pF Ceramic Capacitor at C1.
7>.Step 7: Install 1pcs 0.01pF(103) Ceramic Capacitor at C2.
8>.Step 8: Install 1pcs 0.022pF(223) Ceramic Capacitor at C3.
9>.Step 9: Install 5pcs 6*6*5mm Switch at S1-S5.
10>.Step 10: Install 1pcs 100uF 16V Electrolytic Capacitor at C4,C5. Please pay attention to the positive and negative poles. The shorter pin is the negative pole.
11>.Step 11: Install 1pcs 3.5mm Audio Jack at J1.
12>.Step 12: Connect battery box.Pay attention to positive and negative.
13>.Step 13: Use a cable tie to fasten the battery box.
14>.Step 14: Connect to power supply and enjoy the effect.

1.   50V 0.22μF ±20%  105°C  Φ 4 x 7 mm  10pcs
2.   50V 0.47μF ±20%  105°C  Φ 4 x 7 mm  10pcs
3.   50V     1 μF ±20%  105°C  Φ 4 x 7 mm  10pcs
4.   50V   2.2μF ±20%  105°C  Φ 4 x 7 mm  10pcs
5.   50V   4.7μF ±20%  105°C  Φ 4 x 7 mm  10pcs
6.   50V    10μF ±20%  105°C  Φ 4 x 7 mm  10pcs
7.   50V    22μF ±20%  105°C  Φ 4 x 7 mm  10pcs
8.   16V    33μF ±20%  105°C  Φ 4 x 7 mm  10pcs
9.   16V    47μF ±20%  105°C  Φ 4 x 7 mm  10pcs
10. 16V  100μF ±20%  105°C  Φ 5 x 7 mm 10pcs
11. 16V  220μF ±20%  105°C  Φ 5 x 7 mm 10pcs
12. 16V  470μF ±20%  105°C  Φ 6 x 7 mm 10pcs

Pack:
DS1307 I2C real-time clock chip (RTC)
24C32 32K I2C EEPROM memory
Solve the problem DS1307 with backup battery can not read and write.
Fully charged, it can provide the DS1307 timing 1.
Compact design, 27mm * 28mm * 8.4mm
Leads to the a DS1307 clock pin, to provide the clock signal for the microcontroller.
Can be cascaded to other I2C devices.

Features:
100% brand new and high quality
Ding dong doorbell switch s1 is push button switch on the door, without press the switch, the capacitance cannot be connected is not recharged, and capacitance voltage of 0 v, the reset has been in a low level condition, leading to the speaker doesn't work.When closed switch s1, the VCC current through the diode for capacitor charging, make its both ends of the voltage, and reset voltage also began to rise gradually.When the voltage of the capacitance increased to higher levels, namely the reset input port is the high level, the timer starts, composed of resistance, capacitance and diode oscillator start work, output frequency for f1.When disconnecting switch s1, resistance and capacitance circuit, capacitor began to discharge.At the same time composed of resistance, capacitance and diode oscillator start work, output frequency for ' 2 f.Restore low level is reset when the capacitor discharge end, timer stop working.
In the speaker output termination, output current will make the speaker voice.Output frequency is not at the same time, the sound is different.This circuit has two kinds of different frequency, so the speaker will be issued a "ding" "dong" two kinds of different sounds.
Specifications:
Package Name: NE555 doorbell kit
Working voltage: 4.0-7.0V
PCB size: 28mm (L) *25mm (W)
Kit horn: 8 Ohm 0.25W
Color: Beige
Net Weight: 15g
Package Includes:
1* 8 Ohm 0.25W horn
2* 100MM red line
2* 100MM black line
1* NE555 chip
1* 8P IC block
1* 100UF 25V Capacitance
1* 10UF 25V Capacitance
1* 6*6*5 keystroke]
3* 103 ceramic capacitors
5* 47K resistance
2* 1N4148

Item name: HMC5883L module (three-axis magnetic field module)
Model: GY-273
Chips: HMC5883L
Communication: IIC communication protocol
Measuring range: ± 1.3-8 gauss
Specifications:
Power supply :3-5V
Size: 1.8 x 1.3 cm
Net weight:17g
Package weight:27g
Color:As shown in the pictures
Package included: 
1PCSx HMC5883L Triple Axis Compass Magnetometer Sensor Module For Arduino 3V-5V

Note: This item is DIY Kit, not assembled. default with one PCB board.
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 150Ω ~ 1.5KΩ, 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;
Installation Notes:
1). With the PCB board parts better production, in which the transformer line of thick line and thin line, this should pay attention to the other components by the board of silk symbols and parameters of welding on the line. Transformer board has done three pads, in which the middle of the pad hole is relatively large, the hole at the same time welding a thick enameled wire and a thin enameled wire, thick enameled wire and fine enameled wire do not use the same side, such as with the left Thick lines and the right side of the thin wire into or with the left side of the thin line and the right side of the thick line welding into, in short, do not use the same side of the thick lines and thin lines can be.
2). In order to prevent the output 2-wire distance too far, resulting in no-load, you can weld a 3P pin at the output.
3). After the success of the production, if the output access to a high-voltage capacitor and three high-voltage rectifier composed of voltage doubler circuit, you can produce DC high voltage, you can make anion generator, wiring diagram is as follows:
Package Include:
15VKE = 1 type step-up transformer x1
PCB Board X 1
120 ohm resistance X 1
UF4007 ultra-fast recovery diode X 1
N20 transistor X 1
Heat sink X 1
M3 * 6 screws X 1
Boat switch X 1
3-Pin X 1

 
.
Features:
100% Brand New.
Size: 5.2 x 2.65 x 1.4cm (L x W x H)
Module Properties: non-isolated constant current and voltage module
Rectification: non-synchronous rectification
Input voltage: 8V-34V
Output voltage: 1.25V-32V
Output current: adjustable maximum 5A
Conversion efficiency: 95% (the highest)
Switching frequency: 180KHz
Output ripple: 50mV (max) 20M bandwidth
Load Regulation: ± 0.5%
Voltage Regulation: ± 2.5%
Operating Temperature: -40 °c to 85 °c
 
 

 
.
Features:
100% Brand New.
Size: 5.2 x 2.65 x 1.4cm (L x W x H)
Module Properties: non-isolated constant current and voltage module
Rectification: non-synchronous rectification
Input voltage: 8V-34V
Output voltage: 1.25V-32V
Output current: adjustable maximum 5A
Conversion efficiency: 95% (the highest)
Switching frequency: 180KHz
Output ripple: 50mV (max) 20M bandwidth
Load Regulation: ± 0.5%
Voltage Regulation: ± 2.5%
Operating Temperature: -40 °c to 85 °c
 
 

 
.
Features:
100% Brand New.
Size: 5.2 x 2.65 x 1.4cm (L x W x H)
Module Properties: non-isolated constant current and voltage module
Rectification: non-synchronous rectification
Input voltage: 8V-34V
Output voltage: 1.25V-32V
Output current: adjustable maximum 5A
Conversion efficiency: 95% (the highest)
Switching frequency: 180KHz
Output ripple: 50mV (max) 20M bandwidth
Load Regulation: ± 0.5%
Voltage Regulation: ± 2.5%
Operating Temperature: -40 °c to 85 °c
 
 

 
.
Features:
100% Brand New.
Size: 5.2 x 2.65 x 1.4cm (L x W x H)
Module Properties: non-isolated constant current and voltage module
Rectification: non-synchronous rectification
Input voltage: 8V-34V
Output voltage: 1.25V-32V
Output current: adjustable maximum 5A
Conversion efficiency: 95% (the highest)
Switching frequency: 180KHz
Output ripple: 50mV (max) 20M bandwidth
Load Regulation: ± 0.5%
Voltage Regulation: ± 2.5%
Operating Temperature: -40 °c to 85 °c
 
 

Features for 1602 LCD:
 
 
LCD display module with blue 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: Characters
 
 
 
Can display 2-lines X 16-characters.
 
 
 
Voltage: 5V DC.
 
 
 
Module dimension: 80mm x 35mm x 11mm.
 
 
 
Viewing area size: 64.5mm x 16mm
 
 
Features IIC/I2C :
 
Arduino 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
 

Features for 1602 LCD:
 
 
LCD display module with blue 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: Characters
 
 
 
Can display 2-lines X 16-characters.
 
 
 
Voltage: 5V DC.
 
 
 
Module dimension: 80mm x 35mm x 11mm.
 
 
 
Viewing area size: 64.5mm x 16mm
 
 
Features IIC/I2C :
 
Arduino 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
 

Features for 1602 LCD:
 
 
LCD display module with blue 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: Characters
 
 
 
Can display 2-lines X 16-characters.
 
 
 
Voltage: 5V DC.
 
 
 
Module dimension: 80mm x 35mm x 11mm.
 
 
 
Viewing area size: 64.5mm x 16mm
 
 
Features IIC/I2C :
 
Arduino 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
 

Features for 1602 LCD:
 
 
LCD display module with blue 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: Characters
 
 
 
Can display 2-lines X 16-characters.
 
 
 
Voltage: 5V DC.
 
 
 
Module dimension: 80mm x 35mm x 11mm.
 
 
 
Viewing area size: 64.5mm x 16mm
 
 
Features IIC/I2C :
 
Arduino 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
 

Features for 1602 LCD:
 
 
LCD display module with blue 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: Characters
 
 
 
Can display 2-lines X 16-characters.
 
 
 
Voltage: 5V DC.
 
 
 
Module dimension: 80mm x 35mm x 11mm.
 
 
 
Viewing area size: 64.5mm x 16mm
 
 
Features IIC/I2C :
 
Arduino 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