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You have to be careful because many small power supplies are poorly regulated, which means that they supply excessive voltage when there is a small current load. A 12 v supply might supply 16-17 v when the load is only 50 mA so unless you can check this it's best not to use it.
What else can I help you with?
What power source is needed for 26 small 12volt incandescent 50ma lights?
They could be run in parallel from a 12 v 1.5 amp power supply.
What is 50mA equal to?
50 micro ampheres
Assume a device draws 50ma of current and 150vdc across it what is its resistance?
Ohm's law: Voltage = Current times Resistance Solve: Resistance = Voltage divided by Current So, a device drawing 50ma with 150V has a resistance of 150 / 0.05, or 3000 ohms. p.s. Since power is volts times amps, that device is dissipating 7.5 watts.
What can be pulling to much power from my van and not returing it to my battery?
Its called a parasitic draw. Any electrical component in the vehicle could cause it. To test for a draw, pull the negative battery cable and use a meter to measure amperage between the battery terminal and cable. The reading should usually be below 50mA or <.050 amps.
There is a total of 500mA of current into five parallel resisters the currents through four of the resistors are 50mA 150mA25mA and 25mAand 100mA what is the current through the fifth resister?
150 mA is.
What does 50mA mean?
m means milli,as in 1/1000A means Amps50mA is =0.050 AmpsAmps is the amount of current passing through a device.
What is the maximum voltage to normal type LED with out using resistor?
This varies depending on the color. Try driving them with a current source instead. About 5mA to 50mA should work on any LED. Using a voltage source will blow some colors, and not light other colors at all. Of course a current source is likely to be more expensive than a series resistor.
Why buffer is used between micro controller and relays?
Hi, Buffers usually provide protection to the microprocessor from what is called, `back EMF`(also called spiking) in layman's terms, or the energy created in the coil as the control voltage is released. Also, since most micro's have limited output current capabilities, the buffer could serve as a relay driver, providing the power necessary to energise the relay. Hope this helps, Cubby Cubby is right, mostly the maximum current that a micro controller can source or sink is 25ma, where as most of the relays require 50ma-200ma so a buffer is required to provide the necessary current to activate the relay coil, moreover a back emf is generated when the relay is turned OFF which can damage the controller so buffer also protects the controller from this back EMF......check this link to know more about interfacing relay to a micro controller http://www.dnatechindia.com/index.php/Tutorials/8051-Tutorial/Relay-Interfacing.html
How many lumens does an 18 watt CFL give off?
Currently maximum LED luminous efficiency is about 114 lumens/W, measured at 50mA. Average luminous efficiency is about 104 lumens/W. Ordinary LED light effect is about 60 lumens / W. 18W is about 130 lumens is about 1080 lumens.
What is the difference between a flash based mp3 player and hard disk based mp3 player?
Ok some unbacked up sayings for the beginning: Flash drives have smaller capacities, but are faster. The IPod Touch, Shuffle and the cheaper classes of mp3-Players would feature them (up to about 4, 8 GB). HOWEVER THEY REQUIRE LESS CURRENT(FOR MP3~50mA),INCREASING THE BATERRY'S LIFETIME.USUALLY,A FLASH DRIVE IS MORE EXPENSIVE THAN A HDD WITH THE SAME CAPACITY. Hard Disk Drives (HDDs) offer more space for storage, but tend to be slower and rather aren't fit for jogging (they are bigger, havier and the steel-needle can scratch the disk). If I'm not mistaken the ipod classic uses an HDD.
What are the parameters of the DR25 germanium diode?
The DR25 germanium diode typically features a maximum reverse voltage of around 40V and a forward current rating of about 50mA. Its forward voltage drop is approximately 0.3V to 0.4V at the rated current. The diode is known for its low noise characteristics and is often used in low-frequency applications, such as radio receivers and detectors. Additionally, it has a junction capacitance of about 2pF, making it suitable for high-frequency applications as well.
Can you use a dc 9V 400mA ac adapter in place of 9V 500mA adapter?
No. The 200mA adapter will only produce 1/8th the current of the 1600mA adapter, and probably won't even power what you intend to use. If it does, the extreme undercurrent will likely damage the equipment itself. A possible solution is a universal adapter, which may allow you to set the voltage and/or current for use with the intended device.
