uncleflo

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Some cool dude. Higher order of decision making. Absolute.

Registered since September 28th, 2017

Has a total of 3739 bookmarks.

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IEE Current Ratings Regulations Table 4E1A

https://www.cse-distributors.co.uk/cable/technical-tables-useful-info/table-4e1a/

Saved by uncleflo on January 4th, 2020.

Single-Core 90°C Thermosetting Insulated Cables, Non-Armoured, with or without Sheath. Cable, Technical Tables, Useful Info, Table 4E1A. Thickness of cables that need to provide a specific current.

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ISolar V III Off-Grid lnverter-ISolar SMV/SPV Series

http://www.easunpower.com/content/?992.html

Saved by uncleflo on December 27th, 2019.

ISolar V III is third generation off-grid inverter with rich new functions. Its detachable LCD control module can be turned to remote panel. It’s also integrated with Bluetooth interface ready for mobile monitoring and supports USB on-the-go function to facilitate data upload/download. Battery independency design enhances this inverter to operate without battery connected. Please check our sales for more details.

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custom made heavy duty Multi rotor motor high voltage power plant protection UAV version drone Mapping in Agriculture-in Parts & Accessories from Toys & Hobbies on AliExpress

https://www.aliexpress.com/item/32982585129.html

Saved by uncleflo on December 22nd, 2019.

Model (Motor Type) KV15; Motor Size Motor Size(mm) φ202*150; Weight(g) 12000; Torque (nM) 130; Speed (RPM) 4500; Max Continuous Current(A) 250; Max Continuous Power(W) 80000; Continous power(W) 45000; Max Pulling Force(g) 180000; Suitable for ESC 144v 400A; SHAFT: 20mm; SLOT:36; POLES: 20 (40 MAGANET)

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custom made heavy duty Multi rotor motor high voltage power plant protection UAV version drone Mapping in Agriculture-in Parts & Accessories from Toys & Hobbies on AliExpress

https://www.aliexpress.com/item/33048251382.html

Saved by uncleflo on December 22nd, 2019.

(Motor Type) KV<40; Motor Size(mm) φ240*150; Weight(g) 16000; Torque (nM) 150; Speed (RPM) 6000; Max Continuous Current(A) 400; Max Continuous Power(W) 100000; Continous power(W) 55000; Max Pulling Force(g) 250000; Suitable for ESC Suit for ESC 400V 250A /200V 500A; MOTOR: H240150; SIZE: 240x 150( without shaft )

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Choosing the Right Switch: Know Your AC from Your DC

https://www.electronicdesign.com/technologies/analog/article/21807286/choosing-the-right-switch-know-your-ac-from-your-dc

Saved by uncleflo on December 18th, 2019.

When picking a switch to use in electrical design, many people believe they can use any switch, provided its current rating is more than the maximum load in the circuit. This, of course, isn’t true. Alternating current (ac) or direct current (dc) circuits are capable of carrying very different currents, as illustrated by the ratings on the switch in Figure 1. This is why it’s so important for designers and engineers to understand how to pick the right switch for their product.

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Electric inboard motors - P&E Lowlands

https://www.pelowlands.com/en/products/elco/electric-inboard-motors

Saved by uncleflo on October 28th, 2019.

P&E Lowlands is a brand representative and dealer of equipment, installations, auxiliaries and services in the field of modern power production, storage, distribution or drives in industrial and marine applications. In the first place we focus on a sustainable future using the internal combustion engine and look for advanced energy solutions, alternative fuels and power storage opportunities. Our approach draws from the idea behind the Blue World, the expanded version of Green Energy. The Blue World starts from the circular economy, a system in which reuse of products and raw materials will be maximized. We endeavor to replace fossil fuels in internal combustion engines with renewable alternatives deriving from the circular chain. Think hydrogen or biofuels. It strengthens our belief that the entire world can run on renewable energy resources. P&E Lowlands is based in Willemstad, the Netherlands. From this central location we are within reach of companies in Benelux and the North of France to guide them on the path towards 100 % renewable energy resources. The end of the era of fossil fuels does not mean the end of the internal combustion engine. In the future the IC-engine will be a durable and energy efficient transformer of renewable energy. This will not be achieved without finding ways to store sufficient energy supplied by nature. Until then, we will help you to make your equipment run on as little energy as possible. For this we offer custom solutions. The IC-engine comes in such a way that it perfectly matches the way your machine is functioning.

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Marine - Victron Energy

https://www.victronenergy.com/markets/marine

Saved by uncleflo on October 11th, 2019.

Whether you are a leisure or a professional sailor, you know how important it is to have a reliable power supply so that your electronics continue to function properly - especially far out at sea. Victron Energy offers a broad range of equipment designed specifically with you and your on board power system in mind. We proudly present to you a new era in freedom and independence. 'Service' batteries provide power for everything except for 'engine-starting'. Demand for on-board electricity has to be matched with an adequate battery bank. Lithium Batteries provide the best solution for high power demand. Compared to lead/acid technology they are smaller and about 70% lighter for their capacity. They can be deeply discharged, without harm. More current is available throughout the discharge cycle …and they can be cycled thousands of times - resulting in a much longer service life. It is also 'easier' to drive power back into Lithium batteries - so charging-time is reduced.

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Lithium iron phosphate battery NX LiFePO4 POWER UN38.3 (1280Wh) 12V 100Ah M8-F - AML9138 | Allbatteries.co.uk

https://www.allbatteries.co.uk/lithium-iron-phosphate-battery-nx-lifepo4-power-un38-3-1280wh-12v-100ah-m8-f-aml9138.html

Saved by uncleflo on September 9th, 2019.

LiFePO4 technology differs from lead acid technology, but is perfectly compatible with your device. This battery can therefore be easily installed and does not require any modifications on your behalf. What¿s more, this LiFePO4 battery can be charged with you current lead acid battery charger. This 12V lithium iron phosphate battery is equipped with a BMS (Battery Management System) which protects the battery against short circuits, overcharge and deep discharge. The BMS also balances cells to increase battery life, improve performance and protect against mishandling.

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Live Tides Overview

http://pla.co.uk/hydrographics/ltoverview.cfm

Saved by uncleflo on September 9th, 2019.

Live tides at various areas of England and the UK. Our operations cover 95 miles of the River Thames. We work to keep commercial and leisure users safe, protect and enhance the environment and promote the use of the river for trade and travel This section includes information on all aspects of our operations, from how they are financed to boats we operate and the services we provide.

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PINAMP Mini DIL Optical Receiver Modules | OSI Laser Diode Inc.

https://www.laserdiode.com/standard_products/product/pinamp-optical-receiver-modules

Saved by uncleflo on August 26th, 2019.

OSI Laser Diode, Inc. (LDI) PINAMPs provide a low cost, high performance miniature optical receiver module which integrates a high speed, high responsivity, low leakage current InGaAs photodiode with a GaAs transimpedance amplifier. The transimpedance amplifier incorporates automatic gain control providing high optical overload performance. The receiver package offers high reliability which satisfies Telcordia GR-468-CORE specifications. The pigtailed receivers are available with industry standard FC, LC, SC, and ST® connectors. Custom connectors are also available.

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DIY 24v LiFePO4 Solar Battery Bank! Beginner Friendly, 2.4 kWh, Cheap, Full Tutorial! - YouTube

https://www.youtube.com/watch?v=E4pN4DVPOcY

Saved by uncleflo on June 23rd, 2019.

Safety Update: If the cells have a voltage difference of more than .2 of a volt (example: one cell is 2.7 volts, and another cell is 3.5 volts), you should not parallel connect, and instead discharge the higher voltage cell with a 25-50 watt, 1.5-2.7 ohm resistor. Just attach the leads of the resistor to the individual higher voltage cell, and wait till it is at a voltage that is closer to the other cells. When they are within .2 volts of each other, then you can connect them in parallel and allow them to equalize. Another way to do this is to charge the lower voltage cells, but 3 volt chargers are not easy to find, so I would stick to the resistor method. These resistors only cost a dollars each, and you can find them at most electronics supply stores.

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Google Patents - Variable speed wind turbine

http://www.google.com/patents/US5083039

Saved by uncleflo on April 5th, 2015.

A variable speed wind turbine is disclosed comprising a turbine rotor that drives an AC induction generator, a power converter that converts the generator output to fixed-frequency AC power, a generator controller, and an inverter controller. The generator controller uses field orientation to regulate either stator currents or voltages to control the torque reacted by the generator. The inverter controller regulates the output currents to supply multi-phase AC power having leading or lagging currents at an angle specified by a power factor control signal.

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current

http://openweathermap.org/current

Saved by uncleflo on February 22nd, 2015.

Access current weather data for any location on Earth including over 200,000 cities! Current weather is frequently updated based on global models and data from more than 40,000 weather stations. Data is available in JSON, XML, or HTML format.

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Air-augmented rocket - Wikipedia, the free encyclopedia

http://en.wikipedia.org/wiki/Air-augmented_rocket

Saved by uncleflo on September 2nd, 2014.

Air-augmented rockets (also known as rocket-ejector, ramrocket, ducted rocket, integral rocket/ramjets, or ejector ramjets) use the supersonic exhaust of some kind of rocket engine to further compress air collected by ram effect during flight to use as additional working mass, leading to greater effective thrust for any given amount of fuel than either the rocket or a ramjet alone. It represents a hybrid class of rocket/ramjet engines, similar to a ramjet, but able to give useful thrust from zero speed, and is also able in some cases to operate outside the atmosphere, with fuel efficiency not worse than both a comparable ramjet or rocket at every point.

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Homemade 100 HP Motor Controller for an Electric Car

http://www.instructables.com/id/Homemade-100-HP-Motor-Controller-for-an-Electric-C/?ALLSTEPS

Saved by uncleflo on July 19th, 2014.

This instructable explains how to build your own 100 HP (peak) motor controller for use in an electric car or motorcycle conversion. It can take any voltage up to 144v, and the peak current is 500 amps. The cost of the components is a few hundred dollars, which means you can save over $1000 by putting one together yourself. At 144v, you can expect a top speed of around 75 MPH in a car.

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Open ReVolt Project Forum

http://ecomodder.com/forum/showthread.php/paul-sabrinas-cheap-diy-144v-motor-controller-6404.html

Saved by uncleflo on July 19th, 2014.

Freeway capable EVs are more expensive than slow EVs because you need more batteries (sometimes: could use buddy pairs at lower voltage) and a high voltage controller. The same motor can often still be used, just by advancing the brushes, and maybe adding a blower to keep it cool. So, it seems to me that the best place to focus efforts to making freeway capable EVs more affordable (under $1500?), is to focus on the controller. About $1200 or so can be shaved off the cost of a new controller.

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Tutorial on back EMF suppresion: its causes and its cures.

http://www.progeny.co.uk/Back-EMF-Suppression.aspx

Saved by uncleflo on July 17th, 2014.

Physical electronic access control, almost always, involves driving an electromagnetic locking device of some kind. It might be a powerful magnet or a smaller solenoid within a strike. All these devices are subject to the same basic laws of physics. The electromagnet will store energy when powered and will generate a “back EMF”, or counter EMF (CEMF), when the supply is switched off.

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esc - Controlling small brushless dc motors? - Electrical Engineering Stack Exchange

http://electronics.stackexchange.com/questions/34823/controlling-small-brushless-dc-motors

Saved by uncleflo on July 16th, 2014.

I'm designing an ESC with a small microcontroller running at 3.3V. The BLDC motors I have chosen are extremely small, and run best at 3.7V. I have the power supply for both of these (3.7V is VBATT, 3.3V is obtained using a buck converter). They are 3 phase, and the controller needs to be sensorless. I would like to measure RPM and current usage as well if it doesn't mean I will have an overly complicated design. All the docs I have found are great for higher voltages, and ridiculous currents (I will max out at ~5Amps at 3.7V, I don't necessarily need to design a 100V, 300A ESC). Questions I have: Is there a reference design I can follow somewhere around the net? What kind of protection circuitry should I use? How simple can I go? Are there any ICs that will simplify the circuit even further? Any other recommendations/tips/pointers?

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Brushless DC (BLDC) motor with Arduino – Part 2. Circuit and Software

http://elabz.com/bldc-motor-with-arduino-circuit-and-software/

Saved by uncleflo on July 15th, 2014.

In this post I will describe the hardware and the software part of a project involving the use of BLDC (Brushless DC) motor salvaged from a broken XBox 360. This is a second installment in the series of posts related to Arduino and brushless DC motors. Please see the first part for a bit of info on the theory behind the commutation sequence. Once you understand the commutation sequence for the particular design of the BLDC motor, the circuit design for the BLDC driver becomes pretty clear. It is not much different from a bipolar stepper driver in that we need the be able to both source and sink current at all ends of the windings, except of course in this case there are only three ends whereas the bipolar stepper has four.

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True, Reactive, and Apparent power : Power Factor

http://www.allaboutcircuits.com/vol_2/chpt_11/2.html

Saved by uncleflo on February 23rd, 2014.

We know that reactive loads such as inductors and capacitors dissipate zero power, yet the fact that they drop voltage and draw current gives the deceptive impression that they actually do dissipate power. This “phantom power” is called reactive power, and it is measured in a unit called Volt-Amps-Reactive (VAR), rather than watts. The mathematical symbol for reactive power is (unfortunately) the capital letter Q. The actual amount of power being used, or dissipated, in a circuit is called true power, and it is measured in watts (symbolized by the capital letter P, as always). The combination of reactive power and true power is called apparent power, and it is the product of a circuit's voltage and current, without reference to phase angle. Apparent power is measured in the unit of Volt-Amps (VA) and is symbolized by the capital letter S.

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Surface Recombination | PVEducation

http://pveducation.org/pvcdrom/design/surface-recombination

Saved by uncleflo on October 28th, 2013.

Surface recombination can have a major impact both on the short-circuit current and on the open-circuit voltage. High recombination rates at the top surface have a particularly detrimental impact on the short-circuit current since top surface also corresponds to the highest generation region of carriers in the solar cell. Lowering the high top surface recombination is typically accomplished by reducing the number of dangling silicon bonds at the top surface by using "passivating" layer on the top surface. The majority of the electronics industry relies on the use of a thermally grown silicon dioxide layer to passivate the surface due to the low defect states at the interface1. For commercial solar cells, dielectric layers such as silicon nitride are commonly used.

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Flex 4 Component States vs. Skin States « Saturnboy

http://saturnboy.com/2009/09/flex4-component-states-skin-states/

Saved by uncleflo on January 24th, 2012.

Flex 4 introduced an awesome new skinning architecture. Among other things, the new architecture provides significantly better separation between a component and its skin. Flex 4 also promotes the use of states to the point where they are virtually mandatory in any non-trivial app. And that brings us to the question of the day: How do you communicate state information from the host component down to its skin? As always, we’ll dive into some examples to explore how things work. In our first example, we just want our skin to mirror the states of its host component. So, we begin with a simple component based on SkinnableComponent. And then we add three states: base, happy, sad. Here we discuss the code.

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