Product DescriptionDescription: NE555 circuit and peripheral components constitute a multi-resonator. The output waveform is rectangular wave. By adjusting the duty cycle of the output rectangular wave, square wave can be formed. Further more, the output waveforms can be processed by integral transform circuit. The output waveforms include squ..

Product DescriptionDescription: This suite converts sound signals into radio signals, and restores sound to another place by wireless means using a normal FM radio.It is interesting and can also learn electronic technology to improve practical ability.The following are common uses: wireless microphones, wireless broadcasting, wireless hawking,..

Product DescriptionDescription: Large heatsink, low heat generation for a long time, no need for fan cooling.The copper wire discharge electrode needs to be sharpened to reduce noise.No have soldering manual. Debug instructions: The 103 potentiometer adjusts the duty cycle, increasing clockwise. The higher the duty cycle, the higher ..

Product DescriptionDescription: Hearing aids are a kind of sound enhancement products to help deaf people or elderly people; students can also use them as reading aids to amplify their voices when reciting texts in English, which helps to concentrate.Now our store is introducing a set of hearing aids made of discrete components, which is suita..

Product DescriptionOverviews:The Raspberry Pi has an on-board audio jack, which is super handy for all kinds of sound effects and speech, just plug and go! However, for when you want better audio for music playback,This X350 USB audio card can greatly improve the sound quality and volume.You can DIY a external speaker using the 4pin speaker cable (..

Product DescriptionDescription: Working voltage: DC2V – 15VBoard size: 23 x 27mmThe circuit is a typical self-excited multi-resonance circuit, the circuit suite is simple, easy to understand, interesting, rich theoretical knowledge, especially suitable for beginners to assemble and use. The circuit is provided with explanatory informatio..

Product DescriptionDescription: This kit is designed into ten different Christmas snowman cute cartoon characters, each Christmas snowman middle character is combined into "CHRISTMAS!", and there is a full color LED behind, with 14 full colors LED gradient modes, each LED The effect is matched with a different Christmas song, wi..

Product DescriptionDescription: Board size: 17 x 23mmThis kit needs the buyer to weld and install by himself. It is suitable for beginners, enthusiasts and students in welding and assembling practice.The circuit is composed of photoresistor and triode emitter follower. The voltage of the photoresistor is converted to the base electrode when th..

Product DescriptionUse: High school science experiments, electronic equipment, negative ion generator, small scientific production. This circuit produces a stable high-frequency arc work, the temperature is very high, can easily ignite combustible material, it was called a plasma lighter Parameter: 10KV transformer outer dimensi..

Product DescriptionDescription: The kit is a circuit for a bell that can make "ding, dong" sound.It is composed of a time base circuit integrated block and peripheral components.It has a beautiful sound quality, easy to install, low cost and low power consumption.Its working voltage is DC3V-12V.It is usually powered by a 9V laminated..

Product DescriptionDescription: Working voltage: DC 9-12VSuite includes a full set of component package, PCB circuit boards.Instruction content: including the working principle of the circuit principle diagram, assembly drawing, analysis, and basic component identification and the installation method and so on. Package Included:1 x L..

Product DescriptionDescription:The emergence of traffic lights enables traffic to be effectively controlled, which has obvious effects on diverting traffic flow, improving road traffic capacity and reducing traffic accidents. How to adopt appropriate control methods, make full use of the city highways that cost huge amounts of money, ease the traff..

Product DescriptionFeature:Working voltage: DC6V ~ 12VRecommend voltage: DC 9VRecommend battery: CR2032 (3V)Working current: 35mAStandby current: 1.2mANote:It is kits only. That is to say, all items are not soldered on the PCD board, buyers have to sold them on the pcb board by themselves. We gurantee all items on the following listing included.Onl..

Product DescriptionDescription:This is a kit parts. You should solder it by yourself.This circuit belongs to the OTL circuit teaching model, its maximum power is only 1W, driven by two complementary transistors S8550 and S8050.It can be used for exercise welding techniques, understanding the triode complementary OTL output type and how to adjust th..

Product DescriptionIntroduction: By pressing the key to change the different inputs of the NE555 oscillation resistor, NE555 generates different signal frequencies and drives the buzzer to make different sounds through the capacitor coupling.The kit can generate 16 notes by key combination. Feature: Operating voltage: DC4-12VStandby ..