#DCcurrent
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Is PLUS red? Not always
What color is the plus pole? In the regular color-coding standard, the PLUS pole is marked by RED color and the MINUS by the BLUE color.
However, in Asia, sometimes there is a reversed color coding, where PLUS is marked by the black color and MINUS by the red color.
Keep this in mind when working in DC installations of equipment from Asia, that in some cases the MINUS may be marked by the red color.
The best way it to verify the polarity by measuring, because human and manufacturing errors may occur at any time.
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It is a very good day when new test gear arrives! This power supply is going to simplify bench testing... 💥⚡️😀 #rcflyernews #rcfn #rcsportflyer #rc #servo #rcairplane #rcairplanes #rcsailplane #rcheli #rchelicopter #powersupply #dccurrent #benchtest (at Moses Lake, Washington)
#benchtest#rchelicopter#rcsailplane#powersupply#rcsportflyer#rc#dccurrent#servo#rcfn#rcflyernews#rcheli#rcairplane#rcairplanes
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ZQCM Notebook Cooler, Gaming Laptop Cooler, Laptop Cooling Pad with Fans Adjustable Stands Ultra-Portable Light Weight
ZQCM Notebook Cooler, Gaming Laptop Cooler, Laptop Cooling Pad with Fans Adjustable Stands Ultra-Portable Light Weight
Price: (as of – Details) Stay comfortable while you work, help keep your laptop cool and open edges for optimal airflow. Specifications:Dimension: 417mm*300mm*15mmFan Size: ≤100x100x20(3PCS) ≤80x80x15(2PCS) ≤70x70x15(1PC)Fan Speed: 1900±10%RPM 2300±10%RPM 2600±10%RPMRated Voltage 5V DCCurrent 0.9A±10%Power 4.5WMax airflow: 74.35CFMWeight: 820gUSBQTY: 2USB2.0HUB Product Features:this laptop…
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Hills WP10 Screamer with Chime
Hills WP10 Screamer with Chime
PRODUCT FEATURES Combo top hat piezo/chime, volume control, Main Features:Sound Level: 105dB/mIntegrated adjustable ChimeVoltage: 12V DCCurrent: 110mA DFM International WR32 Tamper Switch Hills S4005 Siren Cover Plastic Hills S4101 Tamper Contact – C/C
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For just $175.00 Assembled Hotend V2.0 GT5 Extruder Head 0.3-0.5mm Nozzle Kit For 3D PrinterSpecifications:Applicable materials: Available 3mm/1.75mm PLA and ABS (not included)Printing precision: 0.1mmMaterial: MetalWeight: 490gNozzle flow rate: about 24cc / hVoltage: 12VMolding method: FDM melt laminatingSize: 88 x 42 x 101mmExtrusion nozzle: 0.3mm, 0.35mm, 0.4mm, 0.5mmThermistors: 100K1% precision NTC thermistorsComponent:1. 42 Stepper motor:2 PhaseWeight: 0.4kgStep Angle: 1.8±5% degreeVoltage: 12V DCCurrent: 12A / phaseHolding torque: 48N.cm Min.Phase Resistance: 10.0±10% Ω(phase)Phase Inductance: 20±20%mH(phase)Rotor torque: 68g.cm^2Braking torque: 2.6N.cm MAX.Insulation class: B(130)Dimension: 42.3 x 42.3 x 40mmPlumbum: AWG26 UL1007With 4pin cable2. Cooling fan:Dimensions: 40 x 40 x 15 mm (3Pin)Voltage: 12V DCCurrent: 0.11ASmall size full of energy to make your printer pretty cool.3. J-head nozzle:12V thermocoupleThermistor: 100K 1% high-precision NTC thermistorSuitable for 1.75mm, 3mm filament ABS / PLA (not included)Nozzle: 0.3mm, 0.35mm, 0.4mm, 0.5mmPackage included:1 x Assembled V2.0 GT5 Extruder Head Kit
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Brutal cold torments the US, and 'the worst is yet to come'
Stay Warm and conquer the coming winter storms with Venture Heat battery heated clothing and never suffer in the cold ever again.
#VentureHeat #HappyNewYear2018 #HeatedClothing #WinterStorms #NewYear #HeatedClothing #Safe #12Volts #DCCurrent #heatedClothing #heatedvests #heatedjackets #heatedhoodie #heatedsweaters #heatedgloves
http://www.cnn.com/2018/01/02/us/cold-weather-continues/index.html
#heated clothing#heated gear#heated apparel#heated shirts#heated pants#heated vests#heated jackets#heated hoodie#heated sweaters#heated gloves#12 Volts Electrical Heated Clothing#Venture Heat#Conquer the Cold#conquer the cold with battery heated clothing from Venture Heat#Conquer the Cold with Heated Clothing from Venture Heat#www.ventureheat.com
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Who’s that guy with the sick, deep pulls?? This morning we (@zhizuzhe and I) woke up to watch the 7am live stream of DC Current vs. the Boston Whitecaps. We’re all feeling the loss of Austin/Barty/@twelveahead over here, but I can accept his absence a little more when it means he gets to be doing cool stuff like this. Boston took the game this time, but Austin did us proud! Also, MLU has funky rules.
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Bistable relays by LAYHER
Looking for a high rating bistable relay? Chek the offer from LAYHER in Germany - http://www.layher-ag.de/de/produkte/leistungsrelais.html
Note: these relays need 130W to 160W of peak power to turn on / off. Keep this in mind for your installation design.
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The relay with a flash back diode. Observe the polarity!
Some time ago, GWL/Team has explained the need to use the reversed diode (aka anti-parallel diode or flashback diode) to be connected in parallel to the relay coils when switching relays by transistors.
Recently there were few cases when customers installed a professionally made relay that already contained the flashback diodes, but forgot to check the polarity. If one connects the relay with a flash-back diode in revered polarity, the diode will create a direct short-circuit that will cause over-current for the switching semiconductor output transistor.
This negligence or “mistake” will cause the burn of the complete component board like the CPM1 or other devices with semiconductor outputs.
Check two or more times the correct polarity of the components that are going to be connected together. Pay attention to the proper installation!
Additional resources
Why don't relays incorporate flyback diodes?
When/why would you use a Zener diode as a flywheel diode (on the coil of a relay)?
https://en.wikipedia.org/wiki/Flyback_diode
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A robust DC switch for 12V applications
This DC latching switch support 12V 500 AMP with peaks up 1600Amps:
Cranking current (1 min.):1000A Nominal make / break current:500A (0 – 34Vdc) 350A (35 – 60Vdc) Peak make / break current: 1600A (0 – 34Vdc) 1200A (35 – 60Vdc)
Check the connection diagram
TBS Remote Battery Switch DCM-RBS-12-500
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Overview of the DC contactors and switches
The physical disconnection together with the proper fusing is one of the basic principles of the proper construction of the DC circuits.
Even though there are customers that buy the cells from GWL, very often there is no mechanical disconnection of the battery form the connected electronics. The customers buy the LFP cells, but they do not buy any relays or switches. So, at GWL, we wonder about the safety of such solutions.
The basic hint and advice from GWL are: Make 100% sure you have a working mechanical disconnection of your battery pack powerlines.
Check the link to the DC contactors and DC switches for your DC Power solution.
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The Communication for BC-16 Battery Meter
The BC16 Battery Meter comes with the TTL communication port that allows reading the data of the BC in a digital way.
https://gwl-power.tumblr.com/post/650919610708852736/
Please see the photos of the connection of the communication cable. Check more at ELERIX GitHub – https://github.com/ELERIX/gwl-m-bc16-sw/tree/main/support
The TTL-232 to USB converter that has been tested by GWL – Check at GWL Shop
The BC-16 Software to allow reading the data from BC16 both on Windows and Linux. This software is available as a support from GWL including the source code in Phyton. - https://github.com/ELERIX/gwl-m-bc16-sw
Enjoy and stay in touch with GWL for additional innovative solutions.
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Industrial Type Circuit Breakers
Safety is the most important factor of any DC powered installation. To help you with the instant safety, GWL supplies the quality circuit-breakers that can be used for your installation. The 125Amp DC Breaker is designed to protect the main DC line while the 32Amp and 2AMp models are designed for the auxiliary power lines or for the powering of the accessories and measuring circuits.
Check the AC/DC breakers on-line at the GWL web shop.
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DC Disconnect Switches – a Must!
Any DC powered solution should have the ability for instantaneous protection and disconnection. GWL Team keeps reminding the customers of the need to apply proper fusing and also the quick-to-go disconnection switches.
The DC disconnection switches are ideal to make the safety disconnection for your DC voltage solution.
Check the two models of the DC disconnection switches 125A and 250A.
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Modular REMA Connectors – Forklift Batteries
The product range for DC applications has been enlarged by the REMA type DC connectors for fork-lift applications.
Check the offer of the REMA type DC connectors 80A, 160A, 320A current ratings.
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DC connectors - Make your connection easy!
GWL now offers the Anderson Style connectors for 50A, 175A and 350A ratings.
Make your connection easy and make sure your battery solution has a flexible connection and disconnection. It is always important to be able to disconnect the battery (or the other DC source) components in an easy way.
The Anderson type connectors 50A, 175A and 350A will help you instantly.
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