Product DescriptionHow it display: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-30 (three-color light)Operating voltage: DC4.5-5VPower supply: 3 AA batteries or USB ..

Product DescriptionNote: This is a DIY kit, you need to assemble it. We don't supply any manuals please note about this before you order it.Brief introduction:This kit is a classic low-power transceivers.This is a very small volume of simple 40 meter band micro-power amplitude telegraph transceiver uses a 9V square battery.The reception is good..

Product DescriptionSpecification:Model:6J5Name:Headphone Amplifier DIY Kits1.16 HZ-28.5KHZ2.Headphone Impedance: 16-600ohm3.SNR:> 108db4.Channel separation <-100db5.Distortion: <0.003% (distortion noise but not all, of the second harmonic modified sound)6.Input and output: standard 3.5mm headphone jack7.NE5532 op-amp8.Tube:6J5 or 6J39.Powe..

Product DescriptionNote: This is a DIY kit, you need to assemble it, no instruction supply.Sepecification: Model: 6j1 Tube (replaceable models 6AK5, 6AU6, 5654, etc.) Channel type: 2.0 / StereoOperating voltage: AC12V 0.8A or abovePower interface: 5.5 * 2.5 plugBoard size: 77 x 75 x 57MM (WDH)Machine weight: 87 grams (with copper pillar)G..

Product DescriptionNote: This is a DIY kit, you need to assemble it. We don't supply any manuals please note about this before you order it.Brief introduction:This kit is a classic low-power transceivers.This is a very small volume of simple 40 meter band micro-power amplitude telegraph transceiver uses a 9V square battery.The reception is good..

Product DescriptionNote: Easy to install, not supply instructions, please solder the corresponding position according to the packing list. Feature: CXA1691 integrated module, FM / AM two band, is very portable.This circuit uses CXA1691 integrated module as the radio core, comes with amplifier, clear sound, quiet processing, high sensitivi..

Product DescriptionDebugging: 1) FM band debugging: Turn the switch to ON, the band selector switch to FM, D1 LED light.The first step: adjust the receive frequency range, the quadruple variable capacitor is adjusted to the lowest, then display FM frequency, with a tool to adjust the L103 oscillation coil so that the figure shows about 69..

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 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 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 Description1. Material: PVC + copper 2. Alligator clips are fully insulated and easily put in probe tipsSpecification: General Size 90*2* 0.8cm Weight 26g Package Weight One Package Weight 0.05kgs / 0.12lb Qty per Carton 12..

Product DescriptionDescription:This DIY Christmas Tree contained more than 20 kinds of difference led breathing effect, 33 leds simulated the star breath flashing effect. The led using the gradual changing brightness instead of directly light up, that makes this diy project looks cool and no longer dull.three pieces PCB combine together to a 126mm ..

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 Description1. Designed for car, portable computer or other 12V rechargeable battery 2. For emergency charging devices, trickle charge the battery with the solar panel 3. Offer you an option to switch a converter, you can charge your phone or other 5V DC product via it Specification: General Size 31.5*16.5*0.2..

Product DescriptionSpecification: General Model LDTR – YJ045 Size 1.8*1*0.7cm Weight 10g Package Weight One Package Weight 0.03kgs / 0.06lb Qty per Carton 120 Carton Weight ..