Best Dkardu in 2026

【Precision】: These devices are precision timing circuits capable of producing accurate time delays or oscillation

【Timing Data】: Timing From Microseconds to Hours

【Two operations】: Astable or Monostable Operation

✅[Usage]: LED strip light dimmer switch is Knob-operated control. Just rotate the knob to adjust the brightness or simply turn on/off the lights.

✅[Specifications]: Rated voltage: DC 5V; Output current: 3A; Output power: 15W; RateAdjustment range: 0%- 100%; Overall length: 38cm/15inch.

✅[Regulation Principle]: Constant voltage output, regulation of current by PWM, no flicker and no current surge, no rapid changes, very linear and smooth settings.

✅【PARAMETER】Supply Voltage: 5V; Current Consumption: 0.6 mA; Measuring Temperature Range: -40 to +85°C; Measuring Pressure Range: 300-1100 hPa

✅【FUNCTION】Not only can measure pressure(Accuracy: ±1Pa), but also temperature(Accuracy: ±1°C)

✅【INTERFACE】It provides both I2C and SPI interfaces. To use SPI, simply de-solder the bonding pads on the back. If you go with I2C, the board also provides 2 I2C addresses for you to select as you want.

【Product introduction】: The module uses the main chip LM393, and has a vibration probe with adjustable sensitivity

【Output command】: TTL level signal and analog output signal

【Scope of application】: it can be used in vibration testing occasions such as burglar alarm, electronic lock, mechanical equipment vibration detection, range target center counting detection, etc

【Basic Features】: The working voltage of 3V - 5V; Output form: digital switch output (0 and 1)

【Easy installation】: Sensor can sense changes in body angle. A fixed bolt holes for easy installation.

【High sensitivity】: Using the highly sensitive switch SW-520D as the angle sensor. Using a wide voltage LM393 comparator.

【Parameters】: Effective Angle: <120 degree ; Detection Distance : <7m ; Power Supply : 5-20V DC ; Quiescent Current : ~65uA

【Docking】: The Module with standard interface that can be controlled directly by microcontroller, Compatible with and Replacement for such as 8051, AVR

【Automatic Trigger】: When someone enters the sensing range is input high level, and people leaving the induction range is automatically delayed closing high level, then Output low level

✅[Feature] : Door pin switch is ON-OFF momentary design.The rating is 20A 12VDC. When the switch is depressed, it breaks the circuit.

✅[Switch Size] : Mounting hole size is 0.315 inches (8MM). Total length is 2.78 inches(70.5 MM). Length adjustable by move two lock screws.

✅[High Quality Material] : The door pin switch is made of metal with chrome plated.The push actuator is made of plastic. Durable material ensures durability and longevity.

✅[Adapter Function]: It will allow you to use your old keyboard with a new computer that only supports USB ports. Blue is PS/2 keyboard, green is PS/2 mouse.

✅[Plug And Play]: With a built-in USB chip, the computer can immediately identify PS/2 devices without installing drivers. The product is of good quality and can be easily installed without a software driver.

✅[Compatibility]: It works perfectly even with very old keyboards. it allows you to reuse the old setup with a full PS2 KVM. It works with both Linux and Win. Your old keyboard and mouse can work again.

【Product introduction】: This item is an inexpensive logic analyzer designed to be compatible with Saleae Logic Analyzer software.

【Applicable to various occasions】: The logic sampling rate of each of the 8 channels is 24M/s, generally about 10M, which is sufficient for various occasions

【Channel value】: A total of 8 digital channels, the voltage range is 0V and 5.5V, of which 1.5V is the voltage threshold, below 1.5V is considered low, above 1.5V is considered high.

【PIR Intelligent Sensing】:With PIR motion sensor, it can detect human movement by detecting infrared ray emitted by human body. Intelligent sensing, it will automatically delay to shut down after the person leaves.

【Stable Sensitivity】:Built-in temperature compensation chip, reducing the impact sensing distance by the temperature. 120 degrees cone angle detecting range, High and stable sensitivity, effectively save energy and improve efficiency.

【Energy Saving】: with this convenient LED motion sensor, you can easily realize automatic lighting and liberate your hands

✅[1 to 2 Slot Fuse Holder]: Provides one fuse holder to protect existing circuit and a second fuse holder to protect new circuit. plugs into Occupied or vacant energized fuse block slot. Easy installation of additional circuits without splicing or cutting.

✅[Widely Used]: It is widely used to add LED light bars, radar detectors, driving recorders or any other electronic equipment that needs to be directly connected to the fuse box.

✅[Quick Connect Terminal]: Blue flexible socket tail, very easy to connect to any naked wires by only use a vise, no welding required.

【Durable material】:The transistor is made of metal oxide semiconductor material, which has good thermal stability and long service life.

【Multifunction】: N channel rectifier with multiple functions such as detection, rectification, amplification, switching, voltage stabilization, and signal modulation, widely used in large-scale and very large-scale integrated circuits.

【Advanced Technology】: Transistor is a kind of precision electronic component with high input resistance, low noise, low power consumption, and a large dynamic range.

【Product introduction】: This Hall NPN sensor consists of voltage regulator, voltage generator, difference amplifier, Schmitt trigger and open collector output. The input are the magnetic induction, the output is a digital voltage signal.

【Features】: Wide supply voltage range. The built-in intelligent sensing chip of the proximity switch can sensitively detect objects, when proximity switch is close to single target object, it will send control signal.

【Advantages】: Long life, small volume, convenient installation. The proximity switch has TVS tube protection and strong anti‑interference ability.

✅Adopt the external MOS tube, double wire and iron, silicone and aluminum magnetic ring, high efficiency, less heating under the same charging power.Low resistance double parallel electrolytic capacitor, plus 6 pcs 1206 ceramic capacitors! Increased performance.

✅Quick charge status indicator: blue light is output indicator, red light is quick charge status indicator!

✅Support for Qualcomm QC4+/QC4.0/QC3.0, for Huawei SCP/FCP, for OPPO VOOC, for Apple 2.4A, for Samsung AFC, for one plus DASH, for VIVO 9V2A dual engine flash charger, for MediaTek PE2.0

【Parameters】: Working voltage: 2.5 - 5.5VDC; Working current: 100mA(MAX); I2C address: 0x20(default), can be modified by soldering A1 and A2 selection pads.

【Pins】: 16 individually addressable pins; Each pin configurable for input or output.

【Feature】: Open-drain interrupt output pin for input change interrupt.

【Principle】: Piezoelectric ceramics are made by the relative stress of the internal positive and negative charge centers under mechanical stress, which results in opposite bound charges, ie piezoelectric effects, and sensitive properties at both ends of the material.

【Properties】: Piezoelectric ceramics are functional ceramic materials that convert mechanical energy and electrical energy.

【Adjustment Transform】: This product has high sensitivity and can be adjusted to respond with a mouth blow or an output with a hand tap (Low turn sensitivity is low, right turn sensitivity is high).

SO MANY TOYS IN A SNAP: Make dozens of cool electronic gadgets - all from one box! A safe and fun way to introduce children ages 8+ to the basics of electrical engineering! Build exciting projects and toys using the included colorful instruction book!

PROJECTS THEY'LL LOVE: So many fun electric-powered projects you can make and play! Ages 8 to 108 will love building 100+ projects! Have fun while building practical skills and learning the basics of circuitry. Build a flying saucer in a snap and watch it take off and sound the alarm! Kit includes 29 Snap Circuits parts.

GREAT GIFT Give the gift of learning and fun this holiday season! Snap Circuits kits will keep kids busy and having fun all year round. Combine with other Snap Circuits kits for even more projects!

SO MANY TOYS IN A SNAP: Make dozens of cool electronic gadgets - all from one box! A safe and fun way to introduce children ages 8+ to the basics of electrical engineering! Build exciting projects and toys using the included colorful instruction book!

AMAZING VALUE So many fun electric-powered projects you can make and play! Build 20+ games with fun sounds and lights! 36-piece kit also builds over 200 exciting and unique projects that come together in a snap! Watch your child write their very own spinning LED message- powered by circuits they engineered themselves!

GREAT GIFT Give the gift of learning and fun this holiday season! Snap Circuits kits will keep kids busy and having fun all year round. Combine with other Snap Circuits kits for even more projects!

NE555 DIP 50pcs

Atomic Accuracy: The Atomic clock has a built-in receiver that automatically synchronizes itself with the WWVB radio broadcast by the US Government’s National Institute (NIST) in Fort Collins, Colorado. The Atomic Clock will always be accurate to within one second as it receives daily WWVB updates.

Jumbo 4” Tall LCD Time Display - Easy to Read, Easy to Use, Easy to Set up - Use as either a wall clock, or as a desk clock with integrated stand. Perfect for anyplace in your home.

Displays time (hours, minutes, seconds), indoor and outdoor temperature, calendar and day of week

Kids Electric Circuits kit can build 335 projects investigating alternative strategies.

Circuit Experiments Kits Included: Lamp,Fan,Door Bell,FM Radio,Burglar Alarm,Morse Code and more.Light,megnet,sound,water control are involved

Educational Science STEM Toys Contains: over 31 circuit snap parts,each component has a code printed, circuit snap parts design, well-connected and no extra tools needed.

DS3231 16-pin memory chips - AT24C32 ,extremely accurate I2C real-time clock (RTC), with an integrated temperature-compensated crystal oscillator (TCXO) and crystal.

Highly accurate RTC completely manages all timekeeping functions.The device incorporates a battery input, disconnect the main power supply and maintains accurate timekeeping.

Integrated oscillator improve long-term accuracy of the device and reduces the number of components of the production line.

COMPLETE CIRCUIT KIT: Comes with one instructions, 5 x crocodile clip leads, 5 x bulbs, 2 x motors, 2 x motor holder, 2 x rocker switches, 3 x propeller with 3 Vanes, 3 x propeller with 4 Vanes, 1 x buzzer sounder, 1 x bulb holders, AA size battery holder (1 x 1.5V), AA size battery holder (2 x 1.5V), packaged with enough circuit accessories for you do science project easily

SCIENCE EXPERIMENT KIT: This popular and interesting electronic science experiment STEM toys can well inspire and encourage kids learning about science. This Montessori learning toy is good for curious kids, turning your own new ideas and inventions into reality. Also perfect for Children's school science STEM engineering projects

WIDE APPLICATIONS: The circuit motor kit can well catch kids attention and let the them try to build, experiment and explore basic electrical simple circuits. It can also be used in school in science, STEM, technology and design courses, easy to meet your project needs, properly educating some circuit knowledge would be a good interaction time with your kids together

⏰【Light-controlled Temperature Clock Kit】: The practical soldering kit are used to installed to a 4-Digit Digital Light-controlled Temperature LED Electronic Clock. Which can display current date, time, temperature in the real time, Alarm clock music. User can set alarm as your needs. This diy electric kit is widely used in schools to help students learn basic mechanical and electronic skills. Highly recommended to practice soldering skills enjoyably for you.

⏰【Great School Science Project】: Electronic soldering project kit for soldering practice and also suitable for family education. Not only to improve your soldering skills, you will also will be more familiar with electronic components and learn more interesting electronics things. But please note, this diy soldering kit requires certain foundation of basic electronic theoretical knowledge and welding and hands-on ability. The finished project can also be used as desktop art accessories.

⏰【Easy Assembly】: In addition to teaching basic mechanical and electronic principles, the led clock kit is easy to build and the principle is simple. The connection that was clearly mapped and labeled on the board. The diy soldering project is often used to teach basic soldering skills. A great first diy electronics kit for any STEM student. The soldering practice kits are also suitable for DIY electronics enthusiasts and can be used as school education practice kits.

Choose the Suitable Clock Mechanism: Total shaft length is 7/8 in, thread length is 5/8 in, this kit fit clock dials from 3/8 in - 1/2 in thick, making you smile of the memories your old clock gives you

PACKAGED WITH CARE: Comes as 2 clock movements, double insurance to repair your clock, with 4 pack hands packaged in a presentation box with custom foam inserts to protect all from scratching, bending, and other damage

DECORATIVE CLOCK HANDS: 4 pack clock hands sets for different options, fit for clock face from 5~12 in diameter; you can pick out the style and length of the hands that look best with your clock at no additional charge

1, 【 WHat You Get 】 ----- In this kit, We carefully select the combination series for you to meet your needs for IC chip work.In total 169Pcs You will get LM324,LM358,LM386,LM393,NE5532,NE555,PC817,ULN2003,ULN2803,ICL7660S,JRC4558,LM339,TDA2030AN,TDA2822D,PT2399,UC3842AN,UC3843AN,DIP4 socket, DIP8 socket, DIP14 socket, DIP16 socket, DIP18 socket. So Many different Types popular IC Chip Assortment Kit can meet all your Daily needs.

2, 【 Product Features】 -----Integrated circuits have the advantages of small size, light weight, small solder joints, long life, high reliability, and good performance. At the same time, the cost is low and it is convenient for mass production. Using integrated circuits to assemble electronic equipment, the assembly density can be increased by tens to thousands of times than that of transistors. The stable working time of the equipment can also be greatly improved.

3, 【 The Most Popular Fully Types Integrated Circuit Chip Assortment Kit 】 ------ We have chosen a variety of useful IC types for daily assembly, such as: precision timers, dual operational amplifiers, audio amplifiers, Darlington arrays, quad operational amplifiers, etc. It is suitable for single power supply with a wide range of power supply voltages, and is also used in dual power supply operating modes.

Good package: come with specially designed blister cardboard box and instructions, convenient to carry

Clock mechanism size: total shaft length is 20 mm (0.79 inches), thread length is 11.7 mm (0.46 inches); Jump second movement, suitable for 4 - 8 mm (0.16 - 0.31 inches) thickness clock panel

Size from the center of the hole to the tip: the hour hand approx. 68 mm/ 2.7 inches; The minute hand is approx. 98 mm/ 3.9 inches in length; The second hand approx. 100 mm/ 3.94 inches

🕐Nice DIY clock repair set: This battery clock replacement mechanism set comes with 5 quartz clock movements, 12 pairs of clock hands, 5 gaskets and 5 hang hooks, and the enough quantity to use and replace, provides a variety of styles to choose from

🕐Size details: the total shaft lengths are approx 13 mm/ 0.51 inches, 18 mm/ 0.7 inches and the thread lengths are approx 5mm/ 0.2 inches, 11mm/ 0.43 inches. Jump second movement is suitable for 2 mm/ 0.079 inches, 11 mm/ 0.43 inches thickness of clock panel; Suitable size is for your easy use and storage

🕐12 Different styles of hands: this clock kit comes with 12 pairs of clock hands in different styles and length for your options, so it is great for clock creations and repairs while providing a decorative effect