The device tag has no wiki summary.
1
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1answer
48 views
Optimizing signal voltage level for 5V device
Are there any benefits associated with using lower signal voltages?
For example, if a 5V device has an input high voltage level minimum of 2V, would running input signals at, say 3.3 vs 4.5 or 5v ...
1
vote
1answer
98 views
Soldering smallest SMD components such as 0402 with Microscope?
I need to use as small components as possible but I need to do everything by hand. My plan is to use OSH Park for the production of the board. The answers did not focus on whether they used microscope ...
0
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3answers
78 views
Cheapest way to build or buy a remote controlled sound maker?
For my high school class's senior prank, we'd like to buy cheap prepaid cell phones (like these: http://bit.ly/VSqOk3), hide them in the ceiling tiles, and then call then randomly throughout the day. ...
-2
votes
1answer
130 views
Home automation appliances wired to micro controller with wireless control from ipad/iphone [closed]
I'm currently going to start developing a media controller for my room. This microcontroller would be controlled wirelessly from my ipad.
so there's three parts to this, my ipad, simple ...
2
votes
2answers
109 views
Video camera exposed to lightning in clouds
Suppose you are sitting outside in the dark and the video camera in the mobile is ON. If the clouds are lightning again and again, will this damage the video camera? As our eyes can get damaged by ...
3
votes
2answers
197 views
What is this device?
I found this little device which got my attention. Maybe you can tell me what it is. Is it a I/O board with an OS running on it similar to Raspberry PI?
ICs on the device:
AMD: AM29F200BT-70EC ...
2
votes
2answers
128 views
Peripheral Devices
I have read few sources that says
"Peripheral is a device which is connected to host computer but not
part of it. A peripheral is generally defined as any auxiliary device such as a computer ...
1
vote
2answers
205 views
How to create small engine with timer
I'm not sure that this is the correct place to ask, but I have had great success with questions on the other stackexchange sites, so I'll try my luck :)
I need a device, which can press a button on a ...
0
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0answers
50 views
Is there any fixed volume electric pump in the market? [closed]
I need to buy an inexpensive component for my project. It needs to pump 15ml from a container. Is there any component or device do that?
Thanks
3
votes
2answers
140 views
What would make a laser measuring device more accurate
I was looking a varioos laser measuring devices (laser tape measures). Most of them seem to be accurate within 1/8th of an inch. I'm wondering what the limiting factor for accuracy is. Is it simply a ...
3
votes
1answer
2k views
Streaming camera solutions for RaspberryPi MCU
I'm trying to get a Raspberry Pi MCU to stream an A/V feed over the internet to a web server where I'll have some homegrown software capturing each frame and doing analysis with it.
My general ...
3
votes
1answer
265 views
Texas Instruments USB2ANY HPA665
I encountered device made by Texas Instruments with label USB2ANY HPA665. It has LED, mini USB and FloppyDiskDrive-like ports.
I can't find any data-sheet, manual or resources what for and how to use ...
6
votes
1answer
87 views
Torque measurement device calibration
I don't know if I'm at the right place to ask this question but here is my trouble :
I'm trying to find a good way of calibrating a electronic device used to measure small torques (0 -> 25 mNm).
...
2
votes
2answers
333 views
What is the purpose of a splitter?
I have a splitter SVI Digital SV-2G Splitter (5/1000MHz) from my Comcast high speed internet self-installation kit.
I try to understand what a splitter is used for, so I found this Wikipedia ...
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 ...
5
votes
3answers
160 views
Dead or alive: Operational transconductance amplifier
My first experience ever with an operational amplifier was with an LM3900 from a Philips experiments kit and these kits date from a long way back in time, when I was a young boy in primary school.
I ...
0
votes
3answers
186 views
How to reverse the effect of an alarm?
I am wondering if it is possible to make an alarm that normally operates/sounds when electricity is flowing through a wire to do the complete opposite. The alarm sounds when there is a constant flow ...
0
votes
1answer
117 views
Buying quality electronic devices
As we know there are companies that make cheap and bad stuff and there are others which make good stuff i.e. tested and with warranty. Is there a certified way such as ISO stamps to check for the ...
0
votes
1answer
150 views
ARM Mini Mobile Device Development [duplicate]
Possible Duplicate:
ARM Processor on a PCB
I'm trying to build a mini device with 3 buttons (that will each preform a task) and it will have an ARM Processor, no screen or form of display, ...
3
votes
2answers
277 views
BJT in Active/Linear mode — How can it still conduct current?
So I've read quite a few books on how BJT's work and all of them seem to gloss over how a BJT in the linear mode with the base/emitter junction forward biased and ...
1
vote
1answer
72 views
Why are handheld devices always backlighted nowadays?
...And mostly, why is it unable to turn this backlight off?
Gaming Consoles (and Mobile Phones, PDA's and other handheld devices) are always backlighted nowadays.
Older devices, such as the GameBoy ...
2
votes
1answer
232 views
What are power cube transformers?
If I'm not wrong, is the term "Power cube transformers" is less commonly used to refer "A.C/D.C Adapter"? I couldn't find the use to this term.
5
votes
4answers
126 views
How do I get the name or number of device?
In many cases when I am designing a circuit, I use transistors, ICs, etc, by using calculations. But when I go to the market I have to ask the product by its name which I don't know. ...
2
votes
5answers
547 views
How to create a simple audioplayer-device for a single soundeffect
My question is:
How can you create an audioplayer device which can play a single soundeffect when a button is pressed.
A Button and the speaker should not be the problem, but the tricky part is, what ...
4
votes
3answers
398 views
Internet weather device using wifi?
Does anyone know a reference design with bill of materials of less than 30US$ for collecting weather data from the Internet eg. Yahoo's and show it on a LCD?
I found many design and dev kits but most ...
2
votes
2answers
317 views
Finding an inexpensive programmable, cellular data device
I need to find a device with the following characteristics:
Programmable. A few kb of ROM will suffice.
Can connect to a cellular data network.
Has one digital pin input.
Power consumption is not an ...
2
votes
1answer
964 views
How to read the device ID of a dataflash memory
I am trying to read the device ID of a serial flash memory by using the SPI connections on an mbed. In the datasheet for the serial flash memory W25Q80 there is this figure.
The following is the ...
0
votes
1answer
138 views
How to read this table in a datasheet
I'm trying to get the device ID out of dataflash memory using an mbed. I'm trying to understand this table that is in the documentation for the memory. I understand that ABh, 90h, and 9Fh are the ...
6
votes
6answers
490 views
Could induction thaw ice?
Last week we had very cold weather; and as a result there were lots of frosted pipes (iron and plastic). I spent a lot of time defrosting metal pipes with a torch, but could not do the same with ...
2
votes
2answers
317 views
What is this part: 2n2 630?
I'm trying to identify a part I removed from a compact fluorescent lamp manufactured around 9 years ago (date on the PCB is 17.12.01).
It is a gray hexahedron and it's 7 mm wide, 2 mm long and about ...
9
votes
7answers
5k views
How to clean a potentiometer?
I have a couple of potentiometers that haven't been touched in quite some time. In fact, probably not in 15 years. So now they produce noisy output, presumably from oxides or some other crud that has ...
