Frequently Asked Questions (FAQ) for Par Led

Honestly, I solder direct to the LED strips. You have to be careful, because if you select wire that is too stiff, it can tear the pad off the printed circuit board. So I use stranded wire, erring on the side of "small". Mind you, I do that soldering on the workbench, not on my knees

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I installed 1157 LED bulbs in my 1978 corvette they worked fine for my brake and turn signal but when i turned?

The brake relay fuse is in all probability for the ABS gadget in basic terms. examine the fuses that say tail lighting fixtures or brake lighting fixtures, turn sig lighting fixtures. All of those are routed mutually. Then on the different hand it ought to in all probability be the turn sign swap as somebody mentioned.

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Maximum safe voltage for underwater LED? closed

Water by itself isn't good conductor, but pretty much every bowl of water you use has additional chemical elements that might make it a better conductor. Gluing might be okay solution but if I were you I would find proper case. It might cost you, but at least IP67 case seems like an option to me.

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Power a diode with a photo diode and an op amp

simulate this circuit Schematic created using CircuitLabAdd 10uF cap to R7 fixed R or pot to filter AC CEILING LIGHT signals or as req'd.This bias is for a single supply. Adjust R1 for 20mA if using 9V , and use a shroud (Heat shrink )for light around detector to block stray light including rear ( if transparent)

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Why is there no power on the load side of a GFCI outlet?

I'd have to go with the GFCI being bad...you shouldn't have to wiggle anything. I'm sorry if you can't take it back & exchange it for a good one, but you don't want any defects. Check your connections, blacks to brass (or blacks, depending on the maker) & whites to silvers...open hot usually means they're reversed

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My aquarium plants' leaves are dying

You'll need to give your plants some fertilizer (I assume that's the word you didn't know).

This site gives an overview of some symptoms and what might be missing then.

Having a general/allround fertilizer would be a good start (CO2 is probably not really required).

Personally, I use Profito and my plants grow really well.

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Driving a 12V LED strip with an Arduino

For low volumes and low board space an integrated CMOS gate driver can be used to drive the MOSFET. See UCC27517A for an example.Oh and by the way, if you need less than 7 A you can use something like the LM5112 instead of the driver and the MOSFET. (If you like simpler is better.)

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coding using Arduino, two 74HC595 and two RGB LED, problems with shifting out database

Have you considered maybe going through a tutorial such as LadyAda's Arduino tutorial?It answers many common questions and problems, so we can spend time fixing new and interesting problems :-).The biggest problem I see in this code isSince you are using an Arduino, you almost certainly want to replace that with something more like:

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Raspberry Pi 2 will not boot Hyperion

Is it Hyperion you are referring to ? Now I have no experience with it what so ever, but from what I understand Hyperion is not a OS in itself, but an ambilight implementation for the Raspbmc distribution, NOT Rasbian.Furthermore it could seem you are trying to install a piece of software as an operating system

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Wifi connetion does not start at boot at ubuntu 13.04 server

You should be able to get it added to the boot-up routine with the following:If that doesn't work or if it tells you it's already there, make sure it isn't crashing at bootup. This will show you error messages in the log:You can find more helpful information about starting services at boot-up time here

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Do you think atheists will take over the world and improve your life ?

The latest catholic interview with a retiring priest acknowledges that they are loosing ground, with their crazed ancient ideas. People are leaving the church in droves. So with the lack of finances they will not be able to continue with the upkeep of all the buildings, and corners the priests could hid behind with little boys

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why when I touch the input cable or put my hand near it the LED comes on?

I am a beginner also and I tried the same code a few days ago.So try connect the button like this:Also at is mentioned in the site of Energia:"External pushbuttons can be connected either through PULL-UP or PULL-DOWN resistors to any Digital I/0 pins."So modify your code like this:Hope it works!.

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how to access LPD data from the OS

Management controllers, which control those LEDs, are usually IPMI-compliant. So you would need the OpenIPMI package for Linux and IPMI plugin for Nagios. Configuration may be somewhat server-specific (there are several generations of management chips - BMC, IMM, RSA2, to name a few). Very old (10 years or so) servers may need ibmasm package instead of OpenIPMI

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How come George Mikan isn't considered a top 10 player all-time?

George Mikan was forgotten because not lots of people wanted to watch basketball because they were mainly watching baseball Jackie Robinson or football Jim Brown and so there was hardly a few great basketball players in the sport(no offense to the others who tried really hard to be one) such as Bob Cousy, Bob Petitit, etc

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Why is Wubi copying files so slowly, mostly with no hard drive activity? (11.04)

Following the advice in the comments, it seems that disabling the Wifi sped things up. I don't know if the system kept trying to connect to one of the networks instead of copying files or something.Alternatively, if the Wifi wasn't what helped, then just keep trying. For me, the install finished on the third attempt

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bathroom light vs. nightlight?

There are many options available today. Just changing the bathroom light to a new energy efficient flourescent bulb will make a big difference in the electrical consumption. But beyond that, available now are LED night lights that can use less power in a 24 hour period than a standard bulb would use in just one hour

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RGB LED strip controlled through PySerial only somewhat functional

Thisshould be spelled:It is much more readable this way; you could refactor even further:Your also wasting effort here:This should be said more like this:This eliminates three temporary String objects you were creating with String().The rest of the code looks like it should work so you should try trouble shooting, you could:

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Options for higher current regulation in an aircraft strobe system

You can get rid of the mosfet by controlling the LM338 directly. The lower pin on that device is just a sense pin and can be used to force the current from the device to be a mA or less I reckon. This saves on the fet and you can use twice as many LM338s.

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Radio activated on/off switch

Why not have the led on all the time? You can do that with a coin battery and an LED and the total cost is not much. Here is a link to an article on how to make what you need. You could leave the magnet off because it will be inside the ball.

LED Throwie.

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Led lighting. Extended lengths

As Dan says, there is a maximum to the number of connected segments you can run. After that, you can get "RGB amplifiers" that are powered, and run the next set of segments. You should take into consideration:It may make sense to have several small(er) power supplies rather than one or two large ones.

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CANT MAKE UP MY MIND...... 46in or 55 in samsung led tv?

I respectfully disagree with Desert Dust. Many times I have heard someone say that they should have bought the bigger television, but I have NEVER heard of anyone saying that they should have bought the smaller television. Get the bigger one because the size of that TV will go with you no matter where you live

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P30N06 Mosfet Not Working Correctly

The gate and source form a capacitor, whose capacitance must be overcome in order for the drain/source to begin to conduct. In order to this, you can place a resistor (Something between 400-1000 Ohms should suffice) between the gate and the source. Be careful to not allow the voltage to exceed Vgs in the datasheet.

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How can I move a working Raspbian Buster installation from Pi 3 to Pi 4?

To migrate a working Raspbian system from a Raspberry Pi 3 to a 4:Assuming you're running Stretch and need to upgrade to Buster:This should do it. These are modified instructions from The only snag I ran into was having to add keys for a repository. It was a lot smoother than I expected.

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Interfacing SIM900A GSM Modem with TM4C123G TI microcontroller

The correct connections are: 3VR on GSM modem to TX port on launchpad, 3VT on GSM modem to RX port on launchpad and GND to GND. External Power supply too. you can test it with connecting the GSM modem to TTL to USB adapter and open putty and write "AT", if it replies "OK", its working

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Why would the resistor be after the LED in this project?

It does not matter if a resistor is before or after a component, see the circuits below. The resistor reduces the current, and this is true for the path where the resistor is in (until the interconnections before/after the resistor). In the examples there is only one path.simulate this circuit Schematic created using CircuitLab.

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Strange LED flicker when powered via buck converter

Suppose your buck regulator has ringing at 100MHz, with amplitude of 0.1 Amp. And that current flows thru 2" of wire, or 50 mm or about 50 nanoHenries inductance.If, using V L * dI/dT, we show 0.5 volts peak ringing, then your bipolars may be turning on.

....just a little bit.

Math: V 50nH * 0.

1 amp /2.

5 nanosecondsV 50/2.

5 * 0.

1 * nano/nano 20 * 0.

1 TWO VOLTS.

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Newbie Help - Trouble with NPN resistor

Maybe something like this is what you have mind, but from your description you could just use one switch and two resistors and no transistors. simulate this circuit Schematic created using CircuitLabEven if you put the PNP in there for some reason, R2D1 and R3D2 could be put in parallel and lose the NPN

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powering 12v LED strip raspberry servo with 1 12v battery closed

Input voltage: 12.6V DCOutput voltage: 12.6-10.8V DCIf the LED strips use simple resistors instead of current regulators, the battery voltage might be a bit low when partially discharged to fully light the LEDs. I suggest you wire your LED strips to a bench supply set to 10.8VDC to check if you still have enough light.

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Does (and when how) the lifetime of a LED depend on the PWM frequency

LEDs are just diodes which don't "wear out" with frequency. The maximum current and average current do affect how the LED wears out, but frequency doesn't have any affect that I've ever heard about.Also, your frequencies are low. 50 kHz and 50% duty cycle means 10 s on and 10 s off. That's a "long" time for a LED.

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Trouble understanding Charlieplexing problem

The section on Forward Voltage in Wikipedia's Charlieplexing article explains it like this:Unwanted LEDs lighting is also a problem where the LEDs are using individual resistors instead of shared resistors, if there is a path through two LEDs that has less LED drop than the supply voltage these LEDs may also illuminate at unintended times

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Can we lose our salvation, yes or no and why?

salvation is freely given and you cant give it back nor can you lose it. however you can stop believing in your salvation and what was done for you, its loss of faith not loss of salvation. salvation once received is forever, once forgotten you can always go back, its not starting again its getting reacquainted.

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If I use a 5A power pack for 3 led strips 2A will the power pack burn duplicate

Are the LED strips the kind with multiple groups of 3 LEDs and a resistor?

If yes, each group of 3 will draw 25-30mA.

Count up the # of groups, do the math, see if the total is under 5A. If it is, you're good to do.If the LEDs are something else, post a picture of them.

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Pi randomly dies after few days, stops responding and blinking green LED continuosly

According to the log, you get a fail to write error. Are you exceeding the file system capacity? Have you expanded the rootfs? If either of those questions seem strange, then most likely you are running out of room on your device.Check out expanding the file system on the Foundation's site for the usual fix.

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ATTiny 85 shift register ir sensor

It looks like there is an issue with the AVR pin setup. To read input from the switch your pin mode should be INPUT_PULLUPand switch should be connected between the pin and the ground. pinMode(switchpin, INPUT_PULLUP);I don't see centre/left/right declared in the loop() function's scope. Is that intentional? Please check.

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Any info on dell amber flashing light?

try this: Unplug the workstation from the lower back of the tower carry the potential button in on the front of the case whilst protecting the potential button, plug the potential twine lower back into the lower back Then launch the potential button and activate now and lower back, it in basic terms should be discharged