Duracell wireless charger, how does it work?
	I picked up a Duracell wireless charger at a garage sale. Model CP-PPS. Also known as MyGrid. Jentec AH 1815-B Rated 15V at 1A. It's NOT inductive. Has alternating metal stripes that supply power to contacts on the device adapter. I have the adapter for the ipad, but no ipad. Thought I'd reverse engineer it to see if I could do anything... more » By mike  - May 14 - 17 new of 17 messages

	Need High Candlepower Beam
	Suggestions on acquiring or building a High Candlepower Beam Input: 12VDC Output: Best I can get. I have seen some "rated" at 3 million candlepower; is that for real? Are there any brighter? By BeeJ  - May 14 - 12 new of 12 messages

Highly Linear ADC Driver Amplifier - need suggestions

I'm currently researching the amplifier options for the output stage of a RF receiver I'm designing. This stage will have a single-ended output and will drive an ADC that has a SFDR of 100 dB. Of course, I need a highly linear amplifier to prevent washing out my ADC performance, but I don't want to use one with differential I/O, which is typically used to drive high-performance ADCs. I would prefer something simple, like a gain block that would reduce my parts count. The frequency range of my output is 2 MHz to 50 MHz, which is too low for most RF gain blocks' optimal frequency range. My goal is to drive 2.5 vpp, while preventing distortion that kills the SFDR of my ADC. A gain of 15 dB to 30 dB is acceptable. Any suggestions?... more » By Darol Klawetter  - May 14 - 9 new of 9 messages

OT: Windows Networking

I use wifi at various hot spots around town and on occasion use a USB adapter to connect to various signals. Often I have a number of choices and have priorities set up in the Manage Wireless Networks window. But lately in one location, Roy Rodgers (one of my least favorite hot spots) is showing up as the first choice to connect to, is set for automatic... more » By rickman  - May 14 - 3 new of 3 messages

Transimpedance amplifier (TIA) oscillating at above 1 GHz. Need Help

Hey Folks, I need to design a broadband TIA for photo current amplification. I am using a LMH6629. I simulated the circuit in Tina-TI an it is working pretty well for a feedback resistor of 330Ohm and a feedback cap of 4pf and a signal of 10MHz. However the simulation is showing oscillation if I increase the cap to something above 20pf. In my opinion it should be stable for higher caps and only start oscillating if the cap is to small.... more » By julian.arnol...@gmail.com  - May 14 - 32 new of 32 messages

Burn In Change in Characteristics

I have an audio I/O board that I test by looping back the analog I/Os externally, stimulating the digital input and examining the digital output. The functional test shows a -0.9 dB drop in gain at 20 Hz and a -2.5 dB drop in gain at 20 kHz. After a 24 Hr burn in the 20 kHz gain is the same within measurement error, but the 20 Hz gain is always down... more » By rickman  - May 14 - 17 new of 17 messages

	Small IC power amplifier challenge
	Do you know a better, cheaper smaller LM386-like IC power amplifier bugger than these?: Preferably: * Less than e.g. 10 legs * Might be heat sinkable * Thermal protection * Short-circuit proof * Missing Current Limiter (MCL) No switch-on and off clicks "depops" * Low quiescent power consumption e.g. 4mA... more » By Glenn  - May 14 - 2 new of 2 messages

CPU voltage regulator integration

Hi, Apparently some new Intel CPU's are being tested with on board voltage regulators (2.4V input buck converters for CPU power rails). Whats really surprising is these voltage regulators include the power mosfets and also the inductors, and possibly even the capacitors I'm not sure! The efficiency right now is only about 80% for the on die regulator,... more » By Jamie M  - May 14 - 7 new of 7 messages

	printed inductors
	When an inductor is printed on a PCB in the shape of a 'square wave' or square zigzag, each time it zags the trace doubles back on itself. Doesn't this cancel the magnetic field to an extent? How much does the coil structure matter to a coiled inductor, or would the straight wire have the... more » By Tom Del Rosso  - May 13 - 34 new of 34 messages

	PrintScreen directly to file?
	Hi Folks, This week I'll have to do a ton of PrintScreen copies because the software I am using doesn't have much in terms of graphical storage functions. So far the drill is: 1. CTRL-PrintScreen 2. Click into graphics software window 3. Paste into a graphics software 4. File -> Save As 5. Type name (usually doesn't have auto-increment)... more » By Joerg  - May 13 - 34 new of 34 messages