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Ebooks Readers – Kindle, Sony, Cybook, Jetbook, and More…Pwm Pulse
Posted on June 23, 2011| Account limit of 2104 requests per hour exceeded. |
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Pwm Pulse
Pulse Width Modulation - what value is instrument displaying?
I built PWM module for controling current trough 10W 12V 900mA LED. I put the ampermeter in series with LED diode. When ampermeter is showing 900mA is this the actual current that is passing trough LED or some average value?.
I am wondering this since the LED is driven by current pulses from PWM module. If I increase current further more, the LED will shine more. But since it is rated 900mA perhaps I should not force it over 900mA?
the PWM frequency will affect the reading of almost any ammeter.
you are probably not reading the peak current. find or add some series resistance somewhere; use the scope to measure the peak voltage across same and dervie peak current therefrom.
Circuit Skills: PWM (Pulse Width Modulation)
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which of these amps is better for my sub?
i have a 10" cerwin vega stroker that is 4000 watts max at 2 ohms with dual voice coils. theres 2 mono amps that i have narrowed it down to but im not sure which one will be best.
the first one is an EARTHQUAKE PHD5000W and heres the specs:
5000 Watts x 1 Peak Power
3000 Watts RMS x 1 at 2 ohm
Damping Factor >800
THD: > 0.016
180-degree variable phase shift
Digital Class Circuitry
Variable Low Pass Filter: 20hz - 200kHz
Built-in variable 24dB/oct low pass-filter
Two independent low level RCA inputs
4-gauge power connection
8-gauge speaker connection
the second is a PYLE PLAD3300D and the specs:
1x1800W RMS at 2 Ohms
1x3600W MAX at 1.3 Ohms
1 Ohm Stereo Stable
MOSFET Power Supply
PWM (Pulse-Width-Modulated) System
Variable Low pass Filter (50Hz~150Hz,24dB/Octave)
Variable Subsonic Filter (15Hz~40Hz,24dB/Octave)
Input Impedance:10K Ohms
THD: <0.1%.
S/N Ratio: >90dB
Input Sensitivity : 200mV ~8V
Freq. Response : 15Hz ~ 150KHz
which is better?
i cant honestly believe your even considering a brand like Pyle. Earthquake is nothing to ride home about, but its a hell of a lot better then Pyle
good luck
Usb Cable amazon
Posted on June 21, 2011| Account limit of 2104 requests per hour exceeded. |
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Amazon Kindle Fire 8GB, Wi-Fi, 7in - Black with case, usb cable, screen protecto |  |
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US $199.00 | 2d 21h 36m |
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Amazon Kindle DX 4GB Wifi White inc case and USB cable excellent condition ebook | |
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US $240.00 | 5d 13h 40m |
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Amazon Kindle Fire 8GB, Wi-Fi, 7in - Black (USB Cable Included) | |
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US $175.00 | 6d 15h 27m |
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Usb Cable amazon
USB Cable for LG Vu CU920?
i bought a cable off amazon and it only came with the Chocolate software. i think i need the software for my phone since my computer says there was a problem. where can i get the software?
the software should come with the phone, doesn't it bring a CD?
Unboxing 2 HDMI Cables, 4-Port USB Cartoon Hub, and Mini Camera Tripod
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Amazon Kindle Fire 8GB, Wi-Fi, 7in - Black with case, usb cable, screen protecto | |
|
US $199.00 | 2d 21h 36m |
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Amazon Kindle DX 4GB Wifi White inc case and USB cable excellent condition ebook | |
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US $240.00 | 5d 13h 40m |
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Amazon Kindle Fire 8GB, Wi-Fi, 7in - Black (USB Cable Included) | |
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US $175.00 | 6d 15h 27m |
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I have a Polaroid m737t digital camera and i've lost the USB cable. Where can I buy it?
Also what's it called? It's not a micro USB and I haven't come across it. I would rather not get it on ebay. Amazon would be fine if I could find it there but I can't.
Hi Kayla,
Try Game Stop or Radio Shack store. Take the camera with you to match up the proper connector.
Hope that helps. Good luck.
Cable Lead
Posted on June 15, 2011| Account limit of 2104 requests per hour exceeded. |
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Cable Lead
What gauge of cable is advisable to connect to 12V sealed lead acid batteries in parallel?
I am building a small 70 Ah battery power supply (using AC inverter) by connecting two 12 volt sealed lead acid AGM 35 Ah batteries in parallel. The battery terminals will be less than 12 inches from each other. I'm not sure what gauge of cable is necessary or advised? Any advice on gauge and materials would be much appreciated.
You're not working with a lot of current. My experience with wiring comes from 12v car electronics, and that puts out many more amp hours than your inverter. A car battery is grounded to the frame using a 4 gauge copper strand cable in many cases.
You're not going to be using a cable thicker than 4 gauge, this much I can tell you.
Replace a power cable/flex/wire/lead on a ghd hair straightener
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What sort of cable do you use to make a guitar lead?
I have made a few guitar leads but I have always done it with 2 core cable, if anyone would be able to tell me the name of the correct cable used to make guitar leads that would be great.
Any good quality shielded cable that's flexible will work. My favorites are made by Canare and Mogami.
You're going to want something without a lot of capacitance to it (specified in pF per 100 feet). The more capacitance, the more high frequency energy gets lost in the cable itself.
Don't get too hung up on terms like "Oxygen Free" or "Balanced Bandwidth"...they're just buzz words that some manufacturers use to justify a higher price.
Single conductor shielded cable is what most folks use to make guitar leads.
Good luck.
Greetings from Austin, Tx
Ken
Cover Sleeve Amazon
Posted on June 13, 2011| Account limit of 2104 requests per hour exceeded. |
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Cover Sleeve Amazon
Modern Warfare 2 Cover about the soldier, desert camo bandana?Outift?
What is the soldier in the cover wearing over his face?
Is it a bandana? covering his face?
just a piece of cloth
BUT look closly, his face is covered by a digital desert camo cloth
BANDANA?
also the cloth around his neck, what is that?
http://www.psu.com/media/call-of-duty:-modern-warfare-2/call-of-duty:-modern-warfare-2-ss-11.jpg
ALSO, where can I buy a full digital desert camo suit(pants and shirt or long sleeve shirt)
Costume store? airsoft?amazon?
He is wearing an ACU Recon wrap around his face. The Shemagh if you look is only around his neck. He's not wearing desert digital anything. It is all ACU which is in the UCP or Universal Camoflage pattern. If you want the real thing you have to be in the service. You can buy knock offs of ACUs just about anywhere though.
CHIPMUNK, CHRIS BROWN & HARMONY INTERVIEW
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Where can I buy Howl's Moving Castle: Limited Edition Sleeve Design?
I know it was amazon only but I really want to find a copy of thelimited edition of Howl's Moving Castle that has the pop up cover. Can anyone help me?
http://www.falklandsbooks.com/info.php?asin=B000E6TY3E&lang=uk
The above link have one copy of this title... Good luck and get in quick!
Ebay.co.uk / .com are your best bet.
Amazon.com may have it also