Stack Exchange Network

Stack Exchange network consists of 175 Q&A communities including Stack Overflow, the largest, most trusted online community for developers to learn, share their knowledge, and build their careers.

Visit Stack Exchange

Questions tagged [specifications]

The tag has no usage guidance.

0
votes
1answer
29 views

what is field exitation type of 775 DC motor?

There are different types of field exitation modes. Some of them are Shunt wound series wound and permanent type So, what type of motor is 775 DC motor? i have tried to search the type from ...
0
votes
0answers
33 views

Identify relevant parameters of Transformer Spec. for Audio Application

Upon the advice of this question/answer I have added a 1:1 audio isolation transformer to my circuit. I picked up a transformer at the local radio service shop and dropped it into my bread-board ...
0
votes
1answer
31 views

How to get the continuous current rating of a power led from the spec sheet?

I am looking at an Osram OSLON® Black, SFH 4715A Infared LED. Is this LED rated for continuous operation? The spec sheet lists: Total radiant flux (IF = 1 A, tp = 10 ms) (typ) Φe 770 mW Does the ...
2
votes
5answers
157 views

Finding LED specs

I received from a friend a bunch of 1W/3W (??) LED. The thing is, I can't find any specs for them. For sure I have a method to test them and find Vf/If, but is that method any good? I need EE's advice....
1
vote
1answer
104 views

Why do commercial components have a temperature range of -40 to 85c?

Why not -50 to 90? How was the temperature range of -40 to 85c chosen to become the industrial standard? (Some products may have a different operating temperature range, but for the majority, the ...
0
votes
2answers
111 views

Is diode with forward voltage ~0.15v faulty?

I tested a diode model SB360 PFS which it showed about 0.15 forward voltage. The reverse voltage is zero. Looking the diode specification I read that Vf is 0.49v to 0.68v. So my question is if this ...
1
vote
1answer
104 views

Actual Accuracy of an ADC

I checked quite some ADC datasheets and am a bit confused regarding the actual achievable accuracy of an ADC. Let's take this ADC for this example (ADC MCP3422): http://ww1.microchip.com/downloads/en/...
0
votes
2answers
164 views

Amperage rating of thermal fuse

Consider this SW-104T thermal fuse. It has a current rating of 10A. Does this mean that in addition to its thermal fuse capabilities (blowing at a certain temperature profile), it also behaves as a ...
0
votes
1answer
111 views

Crowbar Circuit for 35V OVP - What parts should I use?

Please excuse my confusion, because I really don't understand what the "150mA max continuous cathode current" means on the datasheet for the LM431. I'm also not sure it'll work in the crowbar circuit ...
0
votes
1answer
139 views

Is it safe to measure 220Vrms@50Hz on DSO directly?

I borrowed my friend's DSO to complete my project(Hantek DSO5072), but on scope it says CAT II/400V. So is it safe to measure 220Vrms@50Hz with it?
9
votes
1answer
1k views

Why does this microswitch datasheet specify a minimum load current? [duplicate]

The Omron VX series datasheet mentions on page 6 that "Using a model for ordinary loads to open or close the contact of a micro load circuit may result in faulty contact.", and shows that their micro ...
0
votes
1answer
151 views

How do I specify a low RFI LED driver?

I bought a bunch of very cheap 18W LED lamps. I love them; they look great and the light is excellent, however the drivers throw out a lot of RFI and is interfering with my radio (quite bad at 50MHz, ...
0
votes
3answers
114 views

Common-mode voltage outside the specified range

I'm reading the datasheet of TL331. Here a summary of the relevant specification for my question: ...
5
votes
2answers
383 views

Why is the Active/Real Power Rating So Low for This Relay?

I'm trying to select a relay for a IoT project that will control a water boiler. I took a look at the HF32F-G relay, but some of the specifications in the datasheet weren't making any sense to me. ...
0
votes
1answer
45 views

DS1302 maximum current source/sink?

What is the recommended and maximum current sourcing and sinking capability on the DS1302? Is this what's given by "Active Supply Current" in the spec?
0
votes
1answer
76 views

Is it not recommendable to use a spectrum analyzer in its limit frequencies?

Suppose we have a spectrum analyzer whose range of frequencies goes from \$x \ \mathrm{Hz}\$ to \$y \ \mathrm{Hz}\$. Is there any problem that could arise from measuring signals that are near those ...
0
votes
1answer
101 views

Compatibility of an LCD module and a connector

I want to realize i2c communication myself using Raspberry Pi and a LCD module. I am reading documentations to find an appropriate connector but I am a bit confused and I need help. Here is the LCD ...
1
vote
2answers
209 views

SD card speed class specifies “minimum sequential write speed” but not the “maximum sequential write speed”, why?

A speed rating for any memory device is usually how fast it can work. However, the speed class of SD cards actually specifies the "minimum sequential write speed". Please see here for evidence under "...
0
votes
1answer
96 views

What are disadvantages of using SD card SPI mode besides reduced data rate?

The "SD Specifications Part 1 Physical Layer Simplified Specification Version 2.00" states on page 93: The SPI standard defines the physical link only, and not the complete data ...
0
votes
0answers
204 views

OCuLink pinout: how does BP TYPE singal work?

I need to use an OCuLink connection to carry a 4x PCIe link from a motherboard/adapter card (like this one https://www.supermicro.com/products/accessories/addon/AOC-SLG3-2E4T.cfm) to a custom board. ...
-2
votes
1answer
62 views

Battery Pack Life Rating

I am working off of a schematic where I was given a battery pack with the following specifications. The battery being used is a panasonic NCR18650 lithium ion cell. https://engineering.tamu.edu/media/...
0
votes
0answers
36 views

TCXO specification ambiguity

I am going through datasheet of TXKTPCSANF-32.000000. I require a clipped sine-wave TCXO with 1.8 Vpp maximum. However, the datasheet of the TCXO doesn't state the ...
0
votes
1answer
314 views

Linear and non linear phase FIR filter

I am a confused about linear and non linear fir filter. I have this depiction of the solution space for linear-phase and nonlinear-phase FIR filters for a given set of specifications. Region 1 ...
2
votes
2answers
182 views

What specifications matter when comparing TVS ICs?

I have been wanting to update a design I have to include a USB to UART Bridge and while looking at the datasheet for the CP2102N saw what is in the image below. I have never worked with a TVS before ...
0
votes
2answers
545 views

Does an official I2S specification exist?

So, is there an official, preferably up-to-date, specification of the I2S bus, and if yes, where can one obtain it? I've spent some time searching through NXP's website and couldn't find anything. ...
0
votes
2answers
4k views

What is the recommended fully-charged voltage for NiMH AA batteries?

I have done research on different batteries and cannot find a maximum OR minimum voltage to keep NiMH AA batteries within. It seems that typically battery chargers will measure the negative voltage ...
0
votes
1answer
38 views

Can power specs be used without extending the margin to account for losses?

Looking generally at the 74FCT family, I saw that it's power pin should be held at \$5V \pm 5 \%\$ to be in specs. From my understanding, \$\pm5\%\$ power supplies are widely available, but are the ...
0
votes
3answers
112 views

Operational amplifier bandwidth - why does manufacturer tell it's DC when it is not

I've been working with op amp datasheets lately and i noticed strange thing with RF amplifiers specifications. I will provide one example, but there quit more of them with this manufacturer. ...
3
votes
1answer
388 views

What is the usable area (for connectors) of a PCI Express card bracket?

I have a number of awkwardly shaped connectors that I need to cram into a single PCI Express slot metal bracket without any of them colliding with the host PC case's metalwork. The connectors are a ...
-6
votes
2answers
651 views

Can you safely exceed the nominal voltage of a supercapacitor?

From what I found the data sheets usually only specify the nominal voltage, not Absolute Maximum Value or similar. I need to use supercapacitors for a project where they will run for a total of ~20 ...
0
votes
1answer
52 views

Component ID: AA3 03

I'm trying to identify a fault on a printed circuit board in a consumer product. So I tried to find a pin-out diagram, specifications, etc. for this surface mount component designated AA3 03: There ...
1
vote
1answer
40 views

Understanding a motor's specs

I'm trying to understand the specifications of a brushless motor which I would like to buy for making an E-bike. Here are all the specs if have about the motor I'm interested in (copy-pasted from the ...
8
votes
2answers
747 views

Is it possible for an opamp to oscillate at a frequency greater than its GBP?

I was installing a tl3141 into a headphone amplifier circuit and it appears to break into ~250mVp-p oscillation at 8-10MHz on the lower half of the waveform when fed a 1kHz sine wave. Is that even ...
0
votes
1answer
256 views

Identifying and specing an Inductor [closed]

I have a circuit board with a surface mounted inductor which I believe is a film inductor. The board is not working properly and there is a loud squealing sound coming from said inductor so I am ...
0
votes
2answers
74 views

What do the specifications of this RF power meter mean?

I am looking for RF power meter to measure the output power of RF based PCB board which is estimated to give an output power of 45dBm at 868MHz. While searching for meter I have come across ...
0
votes
2answers
2k views

Input leakage current

In the datasheet (like http://www.mouser.com/ds/2/149/NC7SZ125-98364.pdf), there is a spec of input leakage current ( +/- 10uA in this case). I'm wondering about this current. Is this current flow ...
1
vote
1answer
87 views

Understanding LED specifications (hobby kit)

I have an LED that looks like: It did not come with specs for the LED. In laymens terms, I'm trying to determine the technical term for the following descriptions. (What is the max amount of current ...
1
vote
2answers
82 views

What does the term 'min' mean in AAA Rechargeable cell current capacity?

While checking the specification of rechargable AAA Ni-MH cells, the specification shows 2 parameters Voltage say 1.2v and Current Capacity say 630 mAh. However the current capacity is preceded by '...
3
votes
2answers
78 views

How can I tell if a cable is rated for use as motor leads with a variable frequency drive?

I understand that the switching edges generated by a VFD can cause corona breakdown of the insulation on the motor leads. Due to this, it is recommended that some cables be used for VFD motor leads, ...
0
votes
3answers
518 views

diode selection for large current reverse bias, small current forward bias

I'm designing a circuit where I want to pass a small test current from one leg, but block a large "firing" current (rocketry) coming from another leg in reverse bias. I have a 5vdc indicator line (...
1
vote
3answers
133 views

a standard method for flowing down EMC/EMI requirements to internal modules

EMC/EMI standards (conducted/radiated emission/susceptibility) are well established for system boxes. However there appears to be no standards, nor methods for deriving a specification for internal ...
0
votes
1answer
82 views

Is it possible to approximate specs of a LED?

I am thinking about gutting a few infrared LED's from some old remote controllers and using them as part of a battery powered wii sensor bar. Obviously, I do not have the spec sheets for these LEDs, ...
0
votes
0answers
49 views

What happens when the chip enable active time limit is exceeded?

The datasheet of a FRAM chip (FM1608-120-P) says that "the device has a maximum /CE low time specification that must be satisfied". The datasheet does not state what the consequences are when this ...
1
vote
2answers
419 views

Peltier Module/TEG specs explainantion

I am looking for a Peltier module/TEG to power wearables and I'm not quite sure what specs I need or should be looking at. To be honest I am not quite sure what some of the specs even me. Essentially ...
2
votes
2answers
236 views

How many segments are permitted in CAT 6A cable run?

How many segments are permitted in an F/UTP CAT 6A cable run? Segment endpoints require peeling back the foil and untwisting the pairs, which I fear will affect data speeds. I heard that a cable run ...
0
votes
2answers
390 views

What is a zener diode's I_z rating?

I know that IZT is the test current at which the zener's reverse voltage is established. But what is IZ? (So I can enter the characteristics of one in CircuitLab.
1
vote
1answer
78 views

USB 3 to USB 2 Wiring

I have a USB 3 to sata connector which I know worked on my Raspberry Pi 3 (USB 2). I have now cut the USB 3 cable and wanted to solder the wires directly to the Raspberry Pi. This is so that I can ...
3
votes
2answers
2k views

What is meant by VCES in a transistor electrical specification?

I am studying the STMicroelectronic BUL216 NPN power transistor. Electrical specification like VCES is given by the Specification Sheet BUL216 Datasheet. Also, the VCEO spec. Both spec has to do with ...
1
vote
5answers
106 views

Why can optical usb cables not operate below 0°C?

The specifications of this optical usb cable specify operating conditions of more than 0 °C. What is the physical reason behind this?
0
votes
1answer
79 views

What chips does a Sony Ericsson (feature phone) use? (e.g. K510i, K610i, W705, C510) [closed]

I'm trying to replicate the behavior of these awesome Sony Ericsson phones by using Teensy 3.6 so I'm wondering what kind of specifications and chips do these phones have. The phones in question are: ...