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Best Secondary Power Supply

MikroTik Gigabit Ethernet Smart Switch with PoE-out and RouterOS L5 CRS112-8P-4S-IN

  • CRS112-8P-4S-IN is eight Gigabit RJ45 ports PoE switch, that offers different power output options: autosensing 802.3af/at PoE/PoE+ and Passive PoE.
  • Four SFP ports provide optical fiber connectivity options to support uplinks of up to 1 Gbps.
  • There is secondary DC jack on the back of the enclosure that supports 48-57 V power supply (not included, can be purchased separately).
  • CRS112-8P-4S-IN can power 802.3af/at devices if 48-57 V DC input is used (unit will automatically detect and provide correct power to devices).
  • Max current is 1 A per port if input voltage is 18-28 V, 450 mA if 48-57 V. Total limit is [email protected] and [email protected].
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GBGS 30W Solar Powered Exhaust Fan AC Power Backup, Built-in Thermostat Switch, 1750CFM, 4200sq/ft Ventilation, IP68 Brushless DC Motor, Adjustable Solar Panel, 40db, 47.5ft Cable, Double Rust Free

  • 【2 Ways Power Supply: Solar(Priority)+ Electric(Secondary)】A smart power controller is included to allow automatic switching of the powe supply between solar panel and AC/DC power adapter. 30W Solar power works when solar energy is equal and greater than 14V.
  • solar + electric work together when solar energy is greater than 0 but less than 18V.
  • electric power works when solar energy is 0V. This Solar Fan even works on rainy days!.
  • Quite and waterproof brushless DC motor, 14in nylon-fiber-aluminum blades (7 blades not 3 ), galvanization steel housing and mounting frame, solar wall exhaust fans can be assembled Together(Note: please buy extra screws ), front side metal mesh, roof/wall mounted.
  • 【Adjustable Solar Panel】: Horizontally & Vertically (0/30/35 degree. So you can make sure the sun is directly opposite the solar panel. Besides, the panel could be Remote Mounted.
  • Built-in Thermostat Switch, Power on: above 77℉, Power off: below 65℉.
  • AC / DC Power Adapter Length: 3 m (9.84 ft). Lifespan: Brushless DC motore--10 Years.
  • AC/DC Power Adapter--10 Years. Solar wall exhaust fans can be assembled Together(Note: please buy extra screws ). Front side metal mesh. Roof/wall mounted.
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OWC 14-Port Thunderbolt 3 Dock with Cable Compatible with Windows PC and Mac Space Gray

  • Features 14 Ports of connectivity: USB 3.1 Gen 2 / Gen 1 + Thunderbolt 3 + microSD Reader + SD Reader + mini DisplayPort + Gigabit Ethernet + S/PDIF +....
  • Multi-display support: Up to dual 4K or a single 5K, an onboard mini DisplayPort connection plus the ability to use the secondary Thunderbolt 3 port....
  • 85W Notebook charging: Host Thunderbolt 3 (USB Type-C) connection powers and charges notebook computers with up to 85W power.
  • Import Fast: Up to 312MB/s, SD 4.0 spec SD and microSD card reader slots to copy photos & movies from your media cards.
  • INCLUDES: OWC Thunderbolt 3 Dock, 0.5m (18") Thunderbolt 3 cable, External power supply and power cable, Quick Start Guide, 2 Year OWC Limited....
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DIGI XBP9B-DMSTB002 RF TXRX Module, XBee-PRO 900HP (S3B) DigiMesh, 900MHz, 250mW, RPSMA, 200Kbps, 32K Programmable

  • Application: Home security alarm and remote keyless entry； Smart home and industrial sensors； Wireless alarm security system； Building automation solutions； Wireless industrial-grade remote control； Health care products； Advanced Meter Reading Architecture(AMI)； Automotive industry applications..
  • Technical manual support: http://www.ebyte.com/en/product-view-news.aspx?id=437.
  • Features: Communication distance tested is up to 7km； Maximum transmission power of 160mW, software multi-level adjustable； Support the global license-free ISM 868/915MHz band. Support air date rate of 0.018-62.5kbps in the LoRaTM mode； Support 300kpbs in the FSK mode.
  • Compatible with the transceiver of SX1278/SX1276.
  • With large capacity, FIFO supports 256Byte data cache..
  • New SF5 spreading factor to support dense networks.
  • Support 2.5V~3.7V power supply, more than 3.3V power supply can guarantee the best performance.
  • Industrial grade standard design, support -40 ~ 85 °C for working over a long time.
  • IPEX and stamp hole are optional, which is convenient for secondary development and integration..
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Performance Teknique ICBM-892 2 Channel Amplifier 1200W MAX

  • Power – 500 Watts Max x 2 @2-Ohms, 250 Watts Max x 2 @4-Ohms, 1000 Watts Max x 1 Bridged @4 Ohms.
  • Full Range – With a Full Range amplifier you not only have the option to run your speakers, but also your subwoofers.
  • Class A/B Topology – Class ‘A’ amplifiers have enormous amount of current flowing through its output transistors with no audio signal. Class ‘B’ amplifiers have no current flowing through its outputs with no audio signal.
  • Mosfet Power Supply – A MOSFET is an electrical switch that allows the flow of electrical current. It controls the output voltage and current precisely by removing the output current sensing loss & eliminating all secondary feedback circuitry.
  • Variable Gain Control – The gain control is not for adjusting volume. It simply adjusts the amount of signal that is coming from your receiver and going to your amplifier.
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Lian Li STRIMER+ TRIPLE 8-PIN GPU RTX 30 Series Extension Cable Only Compatible with GPU RTX 30 Series

  • Dual PSU Power Supply 24 Pin (20+4) ATX Motherboard Extension Cable, 12 inch/ 30cm..
  • Allowing you to connect an additional PSU to your ATX motherboard.
  • Compatible with 24 pin and 20 pin ATX motherboards (1x 24 pin(20+4) male port and....
  • Both PSU will be powered up by one single motherboard. Use a second PSU to power multiple graphics cards.
  • Length: main cable 12inches + secondary cable 12inches (30cm+30cm).
  • Reminder: If there are pins off, you can plug back in the direction of the slot, does not affect the use!.
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BOSS Audio Systems PD3000 Class D Car Amplifier - 3000 Watts 1 Ohm Stable Digital Monoblock Mosfet Power Supply Great for Subwoofers

  • Power - 3000 Watts Max x 1 @1-Ohm, 1500 Watts Max x 1 @2-Ohms, 750 Watts Max x 1 @4-Ohms.
  • Class D - Power loss is significantly reduced making the amplifier highly efficient. Excess energy is stored until it’s needed instead of being converted into heat. Reduction in size/weight, reduced power waste, smaller heat sink, compact circuitry.
  • Mosfet Power Supply - A MOSFET is an electrical switch that allows the flow of electrical current. It controls the output voltage and current precisely by removing the output current sensing loss & eliminating all secondary feedback circuitry.
  • 1 Ohm Stable - Able to continuously power loads of 1 Ohm without encountering difficulties such as overheating. Typically made to power up subwoofers that demand the heavier power load requirements to be able to perform the way they were made to.
  • Strapping Capable - You are able to strap two PD3000 amplifiers and double the power that is being sent to your subwoofer(s). You now have the ability to connect more subwoofers to take advantage of the extra power.
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DSO 138 Oscilloscope 2.4

  • Training for electronic production , complete detailed descriptive information , like schematics , instructions, etc., making a high success rate..
  • Component species diversity for students to identify elements , inline elements welding, soldering SMD components training..
  • Kits using ARM Cortex-M3 processor (STM32F103C8), and includes a 2.4 -inch color TFT display can be used as test ARM development board..
  • Available source,the ability of a friend can be secondary development kit based on,for example,it can be changed to Millivoltmeter,data loggers,and so on..
  • Students can get in at the same time making a practical tool for audio, video synchronization , low-frequency switching power supply , infrared receiver transmitter signal waveform and many other occasions, effectively observed and measured , increased interest in learning, improve learning outcomes..
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Fully Welded Assembled DSO138 2.4

  • it allowed making a practical tool for audio and video synchronization at same time, low-frequency switching power supply , infrared receiver transmitter signal waveform and many other occasions, effectively observed and measured , increased interest in learning, improve learning outcomes.
  • Component species diversity for students to identify elements , inline elements welding, soldering SMD components training.
  • Training for electronic production , complete detailed descriptive information , like schematics , instructions, etc., making a high success rate.
  • Kits using ARM Cortex-M3 processor (STM32F103C8), and includes a 2.4 -inch color TFT display can be used as test ARM development board.
  • Available source , which can be secondary development kit based on , for example, it can be changed to Millivoltmeter , data loggers , and so on.
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Situ Lighting: Plug-in Micro Series Compact Remote Controlled LED Picture Light USA Made (Black, A) 3 Light (Artwork up to 42\Wx34\T or 35\Wx48\T))

  • ... | Quality Of Light Is Paramount | Compact, Discreet Design Allows Artwork To Stay Center of Attention | 1, 2, and 3 Light Models Are Only 1/2”, 1 3/4”, and 2 ¼” Wide | These Compact Lights Replace Up To Equivalent Of 20” Picture Lights | Manufactured of High Quality Materials | Use Of Advanced Primary and Secondary Optics To Accurately Shape Light | Available In Brushed Brass, Antique Bronze, Black, and Silver.
  • Easy Installation On Framed And Unframed Artwork | Includes: 3 Axis Adjustable Light, Remote Control, Power Supply (5’ of Cord), 6’ Low Profile Extension Cord (11’ Total Cord), Additional Cord Available Upon Request, All Mounting Hardware, Instructions, Minimalist Design Makes for Easy Installation | All Items Included for Use and Installation | Let Us Know if Using with Clock Box and We’ll Supply Appropriate Power Supply.
  • 30 Day Satisfaction Guarantee | UV Safe | Virtually No Heat Transmittal to Artwork | Energy Efficient | Made in Sarasota, Florida by Art Lighting Specialists | 100+ Other Models Available.
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Sundown Audio Salt Series Monoblock Digital Class-D Amplifier (Salt-8 8000W Rms)

  • Power – 500 Watts Max x 2 @2-Ohms, 250 Watts Max x 2 @4-Ohms, 1000 Watts Max x 1 Bridged @4 Ohms.
  • Full Range – With a Full Range amplifier you not only have the option to run your speakers, but also your subwoofers.
  • Class A/B Topology – Class ‘A’ amplifiers have enormous amount of current flowing through its output transistors with no audio signal. Class ‘B’ amplifiers have no current flowing through its outputs with no audio signal.
  • Mosfet Power Supply – A MOSFET is an electrical switch that allows the flow of electrical current. It controls the output voltage and current precisely by removing the output current sensing loss & eliminating all secondary feedback circuitry.
  • Variable Gain Control – The gain control is not for adjusting volume. It simply adjusts the amount of signal that is coming from your receiver and going to your amplifier.
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White Monitor Screens

  • SLEEK DESIGN: 27 inch monitor with Full HD, an HDMI input, 75hz refresh rate, and a resolution of 1920x1080, this desktop monitor is perfect for both home and office use.
  • VERSATILE CONNECTIVITY: Boost productivity as a secondary PC monitor at work or at home office with HDMI and VGA inputs. Great as a second monitor for laptop or desktop computers.
  • SMALL-FOOTPRINT: Built-in power supply unit and cable holder reduce clutter freeing workspace and to regain your desk real estate.
  • OPTIMAL COMFORT: Easy tilt 75Hz monitor with 4ms response time and an anti-glare coating time delivers smooth, blur-free images ideal for a variety of lighting conditions.
  • DELL SERVICES: 1 Year Advanced Exchange Service. If your warranty issue cant be resolved remotely, Dell will send a replacement monitor the next business day.
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East Tester ET430 Handheld Digital LCR Meter Portable Capacitance Tester Multifunction Digital capacitance inductance Resistance Tester …

  • 2.8-inch TFT display, 4-bit semi-display.
  • Display digit: Main parameters: 5 bits, secondary parameters: 5 bits.
  • Supporting Electrolytic Capacitance Measurement.
  • Automatic Recognition of Component Measurement.
  • Support screening and deviation measurement.
  • Large capacity lithium battery power supply.
  • Test frequency: 100Hz, 120Hz, 1KHz, 10KHz, 40kHz, 100KHz.
  • Adjustable measuring speed, manual and automatic range.
  • Short circuit correction with open circuit.
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