The specifications tag has no wiki summary.
6
votes
3answers
136 views
What effect does bit depth of an ADC have on noise floor, THD, or any other specification?
I was told recently that there is a direct relationship between bit depth of a measurement adc and minimum measurable noise floor, which in turn affects accuracy of THD measurements of DUT. I'm afraid ...
5
votes
2answers
106 views
How to search for a component?
Whenever I start a new project, one of the first things I must do is search for suitable components to see if the project is feasible. Most of my projects are desperately space constrained, so I don't ...
-1
votes
1answer
87 views
SMD Trimpot specs - some cite in K/M and others in uH
Was searching for SMD trimpots at a popular online component site, and noticed that the search results were showing trimpots (s.a. from Bourns) some of whose 1-line specs read like they were variable ...
2
votes
1answer
232 views
ARM8/ARMv4 properties for qualitative comparison between RISC, CISC, and MISC processor designs
Question:
I'm wondering if anyone knows roughly what kind of power consumption one can expect from an ARM processor having the ARM8 architecture (ARMv4 instruction set)? (Edited)
Note: I'm not ...
1
vote
1answer
71 views
Does anyone have a manual or spec regarding an NEC JAPAN D78P0308GF
As the headline states.
It seems to be hard to get! The uC is in a Siemens Landsi & Gyr Dialog.
Power measurment equipment 3-phase ZMD120AMer53
4
votes
4answers
344 views
How must I read this MOSFET specification?
I'm looking at this datasheet, which has this graph on page 3:
The FET has an \$R_{DS(on)}\$ of \$14 m\Omega\$; how can \$V_{DS}\$ be > 10 V at 100 A? Shouldn't that be 1.4 V? And if it was 10 V, ...
2
votes
1answer
237 views
High/Low level voltage specs for an IC
I'm trying to work out whether I can talk via SPI without level conversion between a PIC at 5V and an MCP3202 ADC at 4.096V (Vref and Vdd share a pin on the ADC).
I looked at the data sheet for ...
4
votes
2answers
519 views
What does A x B mean when referring to wire strand count?
Stranded wire is often specified using two numbers in the format A x B. For example, 16 AWG wire might come with a 19 x 29 strand count.
What do the first and second numbers mean?
6
votes
2answers
1k views
Transformer labeled 120v-60hz-35va-12v - What exactly does it do?
I have a pool light whose bulb physically broke, but I've found a way to open the water-tight bulb enclosure to get at the actual bulb. I'm trying to either hunt down a replacement bulb (rather than ...
7
votes
1answer
308 views
Why are 5 mm LEDs always rated at 20mA?
OK, maybe not all of them, but by far most of the 5 mm LEDs I've ever handled are rated with I(max) = 20 mA and I've been using them for maybe over 15 years.
Why is this? Is caused by the size of the ...
3
votes
2answers
246 views
What type of LED lights are needed for detecting retro-reflective markers for motion capture project?
I've a project in which I want to add 10-12 led lights around webcam's lens so that the camera can detect retro-reflective tape in it's viewing area.
How this process works is something like this. ...
3
votes
3answers
653 views
Motor driver board - wingxine - need help with wiring
Recently I bought this motor driver but I didn't get wiring diagram for it (it's last time I bought something like this). I would like someone to provide some wiring schematics for this motor driver ...
5
votes
2answers
307 views
Unknown motor, specifications interpretation and use
I got a motor on the picture. Does anyone know what it was used for? My main question is if is it feasible to use it as a barbecue motor or is it too strong? Can I connect it to one or three phases ...
1
vote
2answers
482 views
SPI specifications
I need to program (in Verilog) a peripheral driver connected to an FPGA through 4 standard SPI pins. I have been trying to find an authoritative source that clearly specifies the timing diagrams for ...
1
vote
0answers
132 views
How to deal with mains/grid spikes?
Sorry if this is the wrong place. I thought it fit better here than DIY Stack Exchange.
I replaced a 230 V halogen light bulb with a 6 LED package. Now I notice that all the LED's blink every 15 ...
9
votes
5answers
941 views
Why is power consumption sometimes given in mA and not in units of Watts?
Why is power consumption sometimes given in mA and not in units of Watts? For example, consider the following statement:
"A USB device specifies its power consumption expressed in 2mA units in the ...
2
votes
2answers
228 views
Suggestions for DC/DC converters with digital control
I am under quite some time pressure and I need to put together a document about how several DC/DC converters (preferably buck) with digital control compare to each other. I am pretty clueless, I have ...
5
votes
2answers
615 views
Hart protocol implementation
I would like to implement the HART protocol and am searching for specifications of the protocol.
I found that the Hart Communication Foundation manages the protocol and on this page it says that
...
0
votes
1answer
98 views
What pressure can 'normal' consumer-packaged chip withstand?
I thought I'd be able find this easily via google, but apparently not, so:
What pressure can 'normal' consumer-packaged chip withstand?
(To give a specific example, say the OMAP4430)
I'm presuming ...
7
votes
1answer
168 views
Whence this difference in supply current?
When I need a MAX809 I prefer the OnSemi part over those from Maxim or NXP because the former has a much lower supply current. But I was looking at the NXP datasheet again recently, and I noticed that ...
