Product DescriptionFeature:CTR-30 flash Christmas tree kit consists of three circuit board, allows 36 LED flash alternately, showing a Christmas tree in the space of three-dimensional profile (the night environment has better viewing).Feature:Kit Model: CTR-30C (Colorful light)Operating voltage: DC4.5-5VPower supply: 3 AA batteries or USB charger&n..

Product DescriptionFeature:One end is Micro USB male connector.  The other end is a female head 5.5 x 2.1Note:Your charger voltage and current should talk to your phone or tablet voltage and current match or can not be charged. This adapter cable is the shape of the role played conversion interfacePacakge included:3x Micro USB To Power Ch..

Product DescriptionFeature:Material : BrassPackage included:50 x Brass cylinders (M2.5 x 11 + 6)50 x Screws ( Pm2.5 x 5)50 x Nuts( M2.5)..

Product DescriptionFeature:Material : BrassPackage included:30 x Brass cylinders (M2.5 x 11 + 6)30 x Screws ( Pm2.5 x 5)30 x Nuts( M2.5)..

Product DescriptionUse: School science experiment, electronic equipment, negative ion generator, small scientific production and so on.  Feature: This circuit works to produce a stable high-frequency arc, the temperature is extremely high, can easily ignite the combustible, so it was called a plasma lighter. Note: &nbs..

Product DescriptionIf you don't know how to connect this dimmer to a light, here is the wiring instruction: Specification:Material: plasticColor: blackAC: 220V 50HzMAX power: 150W3 levels: low, medium, high, then offSize: 4.5 x 3.5 x 1.5cm ( L x W x H )Cable length: about 9cmFeature:CE approvalNote: connect the wire correctThe po..

Product DescriptionFeature:Package name: FM TransmitterKit model: RF-02Working voltage: DC3-6VWorking current: 5-15mATransmission frequency: 88-108MHzLaunch distance: 5-50 meters (Affected by the level of production and the use of the environment)PCB size: 53 * 40mmAntenna: 300mm soft antennaFrequency stability: Better (relative to RF-01 model)Sens..

Product DescriptionNote:With Carton box packageNo instruction supply! Package includes: 1 x Project Box (18.4*8.8*4.5cm)1 x MQ-21 x MQ-31 x MQ-41 x MQ-51 x MQ-61 x MQ-71 x MQ-81 x MQ-91 x MQ-1351 x 400 holes breadboard2 x 24cm jumper wire (Male to Male)2 x 20cm jumper wire (Male to Male)4 x 16cm jumper wire (Male to Male)22 x 12cm jumper ..

Product DescriptionNote:Package with plastic boxNo instructions supply! Package includes: 1 x Project box1 x 400 Holes breadboard10 x Resistor (100Ω)10 x Resistor (220Ω)10 x Resistor (330Ω)10 x Resistor (560Ω)10 x Resistor (1k)10 x Resistor (2k)10 x Resistor (4.7k)10 x Resistor (10k)10 x Resistor (20k)10 x Resistor..

Product DescriptionNote: With Carton Box PackageNo instructions supply! Package includes: 1 x Project box (18.1*12*4.2cm)1 x Power supply module1 x 830 Holes breadboard10 x Resistor (100Ω)10 x Resistor (220Ω)10 x Resistor (330Ω)10 x Resistor (560Ω)10 x Resistor (1k)10 x Resistor (2k)10 x Resistor (4.7k)10 x Re..

Product DescriptionDeceleration stepper motor: Diameter: 28mmVoltage: 5VStepping angle: 5.625 x 1/64Reduction ratio: 1/645-wire 4-phase can be driven with ordinary uln2003 chip can also be used in conjunction with the use of two-phase development board, can be used directly plug, easy to use stepper motor in the development board Package ..

Product DescriptionNote:With plastic box packageNo instructions supply! Package includes: 1 x Project box1 x Power supply module1 x 800 Holes breadboard10 x Resistor (100Ω)10 x Resistor (220Ω)10 x Resistor (330Ω)10 x Resistor (560Ω)10 x Resistor (1k)10 x Resistor (2k)10 x Resistor (4.7k)10 x Resistor (10k)10 x Resi..

Product DescriptionFeature:Package name: FM TransmitterKit model: RF-02Working voltage: DC3-6VWorking current: 5-15mATransmission frequency: 88-108MHzLaunch distance: 5-50 meters (Affected by the level of production and the use of the environment)PCB size: 53 * 40mmAntenna: 300mm soft antennaFrequency stability: Better (relative to RF-01 model)Sens..

Product DescriptionNote: This is a DIY kit, you need to assembly it, we supply schematic diagram only.Feature: Constant current outputWide operating voltage: 3.5V – 12VALC circuits do not need to connect diodes or transistorsThe brightness level can be adjustedThe circuit board adopts military grade 1.6MM FR4 sheetPCB dimensions: 40..

Product DescriptionUse: School science experiment, electronic equipment, negative ion generator, small scientific production and so on.  Feature: This circuit works to produce a stable high-frequency arc, the temperature is extremely high, can easily ignite the combustible, so it was called a plasma lighter. Note: &nbs..