Best Step down Module

3Dstereo ViewMaster Space Exploration - 3 Reel Set - (New)

  • Apollo Moon Missions & Kennedy Space Center - Classic Viewmaster - 3 Reels - 21 3D Pictures.
  • Reel A - Apollo 8 Mission Saturn V was launch vehicle for Apollo Missions.
  • Apollo 8 Crew were first men to orbit the moon.
  • Crew were first men to see the far side of the moon.
  • Splash down as Apollo capsule is recovered..
  • Reel B - John F. Kennedy Space Center Space Shuttle Model.
  • Apollo launch recreated in simulated firing room..
  • Reel C - Apollo 11 Mission July 20, 1969 - the Eagle has landed.
  • Armstrong’s historic photo of Aldrin’s first step on the moon.
  • Aldrin stands beside the US flag on moon.
  • Lunar Module Eagle returns to rendezvous with Columbia.
  • Command Module awaits return of first men on the moon.
  • Armstrong: That’s one small step for a man, one giant leap for mankind..
  • You will need a ViewFinder viewer to see the 3D images - available here on Amazon.
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ATNSINC 4Pack LM2596 DC-DC Buck Converter, Adjustable Step Down Voltage Regulator 3-40V to 1.5-35V High Efficiency Power Supply Volt Reducer Transformer Module

  • The input voltage: DC 3 -40 V (Input voltage must be 1.5 V higher than the output voltage, no boost.).
  • The output voltage: DC 1.5 - 35 V adjustable..
  • The output current: It is recommended to use under 2A, maximum 3A(Additional heatsink is required)..
  • Steps: 1. Plugged into a power supply (3-40v), 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..
  • Package includes:4XLM2596 DC-DC buck converter module（Note：The factory have tested these at max voltage so they are very high by default, takes about 15-20 turns CCW before the voltage starts ramping down).
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SMKAN DP20V2A Constant Voltage Constant Current Programmable Control Step-down Supply Power Module

  • The constant voltage and constant current programmable control power supply module is cabinet and delicate, and it put the collection of analog integration and digital control functions in one. Its adjustable output voltage range is 0-20.0V, step by 0.1V. Its adjustable output current range is 0-2.00A, step by 0.01A. Boot voltages can be stored freely and the model has two groups of quick storage voltage. Compared with the traditional analog power supply, it is more convenient to quickly extract the voltage or current required. LCD display on the model has the function digital voltmeter and ammeter. You can view the preset voltage, input voltage, output voltage, the preset current, output current, output power and LCD brightness..
  • Adjusting preset voltage:Pressing SET button, page down to U-SET, press the codding potentiometer, then enter toadjustnumeric value. Press codding potentiometer in turn to choose the numeric value you want to adjust. Turn codding potentiometer to adjust the numeric value. If you want toexit adjusting voltage, press shortly SET. In the process of adjusting preset voltage, if you open output voltage mode by pressing the ON/OFF, the output voltage will be refreshing by increasing or decreasing the numeric value.
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AOICRIE 3Pcs DC to DC Voltage Regulator Step Down Power Supply Buck Converter Module 6-40V to 5V 3A Dual USB Port Output

  • DC-DC 9V/12V/24V/36V to 5V 3A step down power converter module..
  • Converting Efficiency: 92% (MAX), Switching frequency: 150KHZ, Input: 6V-40V, Output: 5V / 3A (MAX)..
  • This module has short circuit protection, Working temperature: -40 to +85 degree Centigrade..
  • Load capacity: Maximum output 3A (with two phones simultaneously) Conversion efficiency: 92%..
  • On-baord Dual USB port with 5V 3A fixed output,can be used as a USB charger for your power bank,smart phones,tablet,etc.DIY Mobile Power Supply,5V output for charging Phone,MP3, MP4, etc..
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DROK® DC-DC Buck Converter 3.5-30V to 0.8-29V 10A Step-down Volt Adjustable Output Voltage Regulator Module Power Supply with High Accuracy Voltmeter Red Digital Tube Display

  • DROK DC buck converter input voltage range is DC 3.5~30V, output adjustable voltage range is DC 0.8~29V, max output current is 10A, conversion rate....
  • LED Voltage Meter: the step down regulator is equipped with high accuracy voltmeter, red LED display, press the key to switch display input voltage or....
  • Metal Case: DROK volt transformer is designed with metal case, can protect the module from destroying, and the case itself is a heat sink, excellent....
  • Note: please make sure that the input voltage is higher than the output voltage at least 1V.
  • please note that this module doesn't have reversed....
  • Small Size: the switching power supply module is with compact design, dimension is 85mm*58mm*33mm(L*W*H)..
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DROK DC 24V to 12V CC CV Step Down Volts Regulator Constant Current Voltage 8A DC Adjustable Buck Converter 7-40V to 1.2-35V LED Driver Charger Module with Charging Indicator Solar Power Supply DIY

  • Module Properties: non-isolated step-down constant current , constant voltage module (CC CV) charging module.
  • Output voltage :DC 1.2-35V continuously adjustable.
  • Output Current: 8A ( when power tube's temperature exceeds 65 degrees, please add cooling fan ).
  • Constant current range :0.2-8A ( adjustable ).
  • Input 24V Output 12V 5A ripple around 50mV ( excluding noise ).
  • Application: High-power LED constant current driver, rechargeable lithium batteries (including ferroelectric), 4V, 6V, 12V, 14V, 24V rechargeable batteries, nickel-cadmium nickel-metal hydride batteries (battery pack) charging, solar panels, wind turbines.
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FDSF Diy In12 In-12 Nixie Tube Pcba Kit Digital Clock Beautiful Gift,No Tubes

  • 2.12/24 hour module: Click "Up" key to change.
  • 3.Sleep module. Long Press "UP", while no display , into sleep module(22:00~07:00 no display. 07:00~22:00 display). Display all "0"number,out of sleep module..
  • 1.Set : Long Press "Down" key into setting . Click "Up","Down" to select , and Long Press "Down" key to finish..
  • 4.Set back color: Click "Down" to change color. when color refresh that means it is into change color automatic (every day change one color),or color is fixed..
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DCDC Converter, DROK Step Down Voltage Regulator Module DC 4.5-40V 36V 24V to 1.25-37V 12V 9V 5V 3V Variable Buck Converter Adjustable Electronic Power Supply Volt Reduce Transformer Stabilizer Board

  • DROK DCDC converter input voltage range is DC 4.5-40v, output voltage range is DC 1.25-37v, the voltage is continuously adjustable. It is a non-isolated buck converter, can dial down voltage from 36v 30v 24v to 12v 5v 3.7v 3.5v 3.3v 2v..
  • Analog Control: Our DC buck converter is designed with a adjustable potentiometer, the output voltage can be easily and accurately adjusted with a mini screwdriver. Clockwise to step up voltage and counterclockwise to step down voltage..
  • Protection: This power supply supply step down regulator is with over-temperature and short-circuit protection, which protect your device from damaging and enhance its safety when using..
  • Low Power-consumption: Although the voltage range is wide, this buck voltage module has a low power consumption of only about 3A when in static state..
  • Note: Please make sure the input voltage is at least 1.5V greater than output voltage to ensure stable output.
  • please note that there is no reversed connection protection, so check the polarity of input voltage before power on to avoid burning due to reversed connection.
  • please add heatsink when the output power is larger than 15W..
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KEYESTUDIO Basic Starter Kit for Microbit V2 V1.5 (Not Included), with 35 Lessons Tutorial, i2c LCD, 5V Relay, LED Matrix, Breadboard Components Great for Teens Kids STEM Programming

  • The easy plug starter kit v2.0 are designed for STEM education and it allows children to learn programming easily or teachers to bring the detailed lesson plans into their classroom and embed them in their learning system..
  • It contains a control board, 8 piece RJ11 cables, a USB cable, and 25 piece popular and creative sensors and modules like Fan Motor, DS3231 Clock Module, IR Receiver Module, 2812 RGB Module, OLED Module, Ultrasonic Module, PIR Motion Sensor, etc..
  • A big surprise is that there are no complicated jumpers and soldering, they are convenient to connect using the RJ11 interface, and we also provide Mixly graphical programming tutorial..
  • Mixly is a free open-source graphical for Arduino programming software, based on Google’s Blockly graphical programming framework..
  • This programming learning kit includes 22 interesting and instructive tutorials, step by step to familiarize you with electronic modules, exercise your logical thinking and develop your ideas..
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