Questions tagged [specifications]
Specifications for an electronic component provide the basis for parametric part selection for operation or optimum performance of a circuit or to prevent damage to integral or connected circuit components.
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Mean Well Power supplies have much lower efficiency and much higher leakage current than rated
I am going to have a power supply which will always be connected to AC mains and occasionally, a led strip will be connected and disconnected to the supply with a relay. I want an efficient and low &...
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How to interpret External Clearance spec on HCPL3700M IC?
The spec for the HCPL3700M (AC voltage detection IC) lists an "External Clearance" of ≥7.4mm.
Is this saying that no component or exposed trace should be within 7.4mm on any side of the chip?...
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Why are Lunar White LEDs not a standard part, or what am I missing?
TL;DR: Lunar White is a widely-used standard color in signaling work (like, every pedestrian signal that conforms to ITE specifications uses it, as far as I can tell), so why can't you buy Lunar White ...
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What does 'Minimum Holding Voltage" refer to for a Thermal Fuse?
One of the components I am looking at for a new design is a thermal fuse. In the documentation it refers to a "Minimum holding voltage". Source: https://www.bourns.com/docs/Product-...
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What is meant by TTL in this context?
Regarding this driver manual, the analog input has range 0-5 V with 1 MΩ input impedance. But the manual also writes that the analog input is not TTL compatible:
I thought the term "TTL ...
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3A754 Gunn diode I-V profile
Does anyone know what the I-V profile of the (I think Russian-made) 3A754L 140mW Gunn diode looks like? I am new to this device and don't see anything online. I am familiar with the typical IV curve ...
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Calculate DC cable diameter
Please assist in defining the required DC cable diameter for the following requirements:
Voltage: 48 volts
Watt: 8500 watt
Running distance: 50 meters
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Transistor as switch that can handle a high base current [closed]
Which cheap, simple transistor can handle a high base current and doesn't need a base resistor to use it as switch?
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EDID emulation in HDMI and DisplayPort, is DisplayPort really more difficult?
I've been doing a lot research on EDID and HDMI and DisplayPort and I have a question about the relative difficulty of always-on EDID Emulation between the two specs.
With HDMI, almost every Matrix ...
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Transistor choice for solenoid actuation
I'm a software guy trying to do a small electronics prototype project and need help with selecting a transistor. I know this must sound like a very basic question here, but this looks like a great ...
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Specs for obsolete relay OEG OL-C-212H12VDC
I've extracted a relay labeled OEG OL-C-212H12VDC from an early 90s Technics amplifier whose service manual refers to as RSY0009-0. It has an additional line indicating 9142 T. Its coil is busted, ...
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6 A, 30 VDC relay as substitute for a 5 A, 30 VDC relay
May I confirm on this forum if a 6 A, 30 VDC relay can be used as a substitute for a 5 A, 30 VDC relay? They have the same number of pins as well as holding coils orientation.
I purchased a relay as a ...
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Is HSYNC required during VSYNC for VGA?
As a development to my previous question I am developing a protocol to drive VGA through lines originally designed for SPI communication.
The problem is that I may be able to instruct the receiving ...
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Confused with parameter definition of spectrometer
Regarding this spectrometer specs, what is meant by "spectral sampling resolution"`? It is give as 2.55 nm. And how is that different from spectral resolution? The term "spectral ...
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Are there any published values for GPIO slew rate or rise/fall times on ESP32?
Are there any published values for GPIO slew rate or rise/fall times on ESP32? I had a look at the datasheets and couldn't find any. I also couldn't find any measurements elsewhere. Have Espressif ...
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Clock division and duty cycle for ST8034P Smart Card interface
The ST8034 is a family of interface ICs for contact Smart Card. Here is the Data Sheet. My question is about the ST8034PQR.
when the CLK output is active, does fCLK = fCLKIN or fCLK = fCLKIN/2 ?
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Rectifier diode specs not clear
https://www.tme.eu/Document/e6d16d51cc343d73832bf32cc9d69d1f/p2500a.pdf
How does that "RthA < 4 K/W 1)" work?
...
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Is the Rds(on) of a MOSFET typically specified at the boundary of the saturation and triode regions?
Datasheets specify the Rds(on) of a MOSFET at some specific gate-source voltage, e.g. 100mΩ @ Vgs=4V. Up until now, I assumed that the test gate-source voltage was essentially arbitrary and chosen ...
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Is there a general rule to calculate heat dissipation of electronic equipment?
Is there a general rule for calculating heat dissipation in electronic equipment if it's not listed in the specs?
I have a couple of projects coming I'm working on that require this. For one situation ...
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Non-overlap time in auxiliary contacts on contactors
As long as I have tested, my standard contactors such as Schneider TeSys LC1D32A are equipped with (13-14) NO and (21-22) NC contacts, which never close simultaneously.
For this device, the auxiliary ...
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Understanding voice voil actuator vendor specifications
I'm thinking of potentially using a linear voice coil actuator to move a 90 g mass between 0 mm and 1 mm and back in the horizontal direction with a frequency of 20 Hz. Assuming triangular ...
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PID control with anti-windup time specifications
I have scoured the internet for a quite some time now and could not seem to find the answer to this.
Is there a formula that approximates, with these specific gains (Kp, Ki, Kd, Kt), the rise time, ...
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NEC asic information from around 1990
I'm looking for datasheets with specification for the NEC ASIC/Gate Arrays from around 1990.
More preciselly, any information with specifications of their ASIC/Gate Array lines.
I would like to known ...
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How to know if an opamp can drive capacitive loads?
There has been a lot of questions about how to stablise opamp circuits driving capacitive loads. However, I know there are some op amps that are designed to drive capacitive loads but I am struggling ...
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What can I assume for the voltage tolerance of commercial 12 VDC equipment?
I am thinking about 12 V backup power supply options for my home networking equipment; these run from 12 VDC wall warts supplied with the equipment. The data sheets for such equipment typically say ...
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10000 pF - so many zeros
Why are 10 nF capacitors sometimes (usually) specified as 10000 pF?
Why are we trying so hard to avoid nF? Seems unnecessary and error prone.
Note: Question also relates, of course, to 1 nF vs 1000 ...
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Questions about relays specifications
I want to use a relay to switch high power LEDs ON and OFF. Nothing out of the ordinary yet. My problem comes from the fact that my control voltage is not stable (it varies from 5V to 12V for example)....
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Interpreting spec sheets for an inverting op amp
I'm interesting in putting together an inverting op amp to take a signal voltage from 10 V to 0.01 V (Gain = -60 dB). By signal voltage I mean the current input and output will be low (e.g., <1 mA)....
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Acceptable SNR for a Sound Level Meter
I'm designing a low power (<150mW) sound level meter (SLM) using a 24bit ADC (preliminarily using the LTC2512-24). This is for audible frequency range signals only (20Hz - 20kHz). I'm focused on ...
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How to use units given for heatsink thermal resistance?
In looking for a heatsink I came across a company giving the thermal resistance of extrusions in °C/W/3in. How do I use this?
Say I use an extrusion with a specification of 1.5 °C/W/3in and get it ...
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Is it ok for a DC socket 5.5x2.1 to supply higher current than in the specifications?
I have recently bought a DC socket similar to the one below:
https://de.aliexpress.com/item/32681671586.html.
It is only used as a plug to connect a small circuit with a heating wire so there are no ...
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Why is power specified in watts rather than amperes?
This probably has an obvious answer I'm missing, but searching the web only gave me information on how watts are defined, not why we use them.
Many electric appliances (from things used to build ...
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Audio transformer power level
I am going to use SP-69.
https://catalog.triadmagnetics.com/Asset/SP-69.pdf
Its power level is 50mW.
I am going to use DRV135 to drive audio transformer(SP-69).
Output voltage of the DRV135 is 7Vrms(...
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reading specification sheet of a cable
I'm having trouble reading the following specification sheet: https://www.molex.com/pdm_docs/ps/PS-15166-001-001.pdf
if it doesn't work, I just pressed the datasheet button in this product:
https://...
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Electrical reason for the minimum altitude (-50 feet) in the computer specs?
Are if there any electrical reasons not to operate or store my Dell OptiPlex computers below the altitude of -50 feet, as written in the specifications?
Screenshot of the original Dell OptiPlex ...
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Understanding ADC input voltage range from its specifications
I want to use this ADC, an LTC2344-18, a quad, 18-Bit, 400ksps ADC. On page 15 you can see that the analog voltage input range can be set to +-Vrefbuf. Vrefbuf can be set to 2.5V to 5V. This would ...
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What are the standards for hand placing components?
Is there any written specification for the orientation of components on a manually assembled PCB, including both THT and SMT passive components?
'Manually' because machines can be easily setup to ...
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Spec sheet notation: 2 dots between numbers
I was comparing spec sheets for the AH3503 and the SS49E when I ran into notation I have never seen before: a number, followed by 2 dots, followed by another number.
What does this notation mean? ...
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How are desired specs decided upon in a common emitter amplifier circuit? (beginner)
I have been reading up on amplifier circuits recently out of curiosity and would like to attempt designing my own. However, I would first like to understand how various amplifier specifications are ...
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Are "anti-surge resistors" just regular resistors?
I am looking for high-power SMT resistor, and found this guy:
My question is: what does "anti-surge" mean, in the context of a resistor? Is it just the suggested application (a crowbar ...
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Can MOSFET exceed breakdown voltage without being permanently damaged?
I just have a simple question that I can't find a simple answer to anywhere.
Is it possible to exceed the breakdown voltage of a power MOSFET (to short circuit it) without causing permanent damage?
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What does the electrolytic capacitor specification E 9 A 105 CF mean?
What do these electrolytic capacitor specifications mean?
E 9 A
105 \$^\circ\$CF
Is its maximum temperature 105 Celcius or 105 Farenheit? It has both letters.
user287128
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What do these forward currents at specified wattages mean?
An LED I'm looking at has various specs listed that I can't make heads nor tails of. It is listed as a "3W LED" supporting a 2.5V minimum and 3.6V voltage. However, "Forward voltage&...
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What are the 9V battery terminal size specifications?
I'm trying to find the dimensions of a 9V (PP3?) battery (no specific chemistry). For some reason it's giving me a lot of trouble. I've been able to find most of the information (I checked a bunch of ...
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Design a BJT amplifier to meet all the given specifications (using LTspice)
Given parameters: 1 kHz, 10 mV sine wave as excitation (Vin).
Specifications to be matched:
Input resistance (Rin) = 18 kΩ,
Current gain = 33 dB,
3 dB bandwidth = 425 kHz
We are allowed to vary R2 ...
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How to get working "specs" of iMac fans from logic board schematics? [closed]
I would like to salvage these three fans
They come from an Apple iMac 17-Inch "Core 2 Duo" 2.0 (Late 2006 - iMac5,1 - A1208 - 2114)
CPU Fan
Apple Service Source P/N: 922-7641
Apple P/N (on ...
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Humidity design requirements
I have to design a electronics device that is specified for environmental operating conditions of 0°C to 60°C with 5% to 95% relative humidity (non condensing).
I think the temperature part should be ...
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Op amp advertised as BW = 105MHz, but GBP is actually 70MHz, what's being spec'd differently?
I just came about an op-amp spec where they say, "the Op-amp X is unity-gain stable with a small-signal unity gain bandwidth of 105MHz.." As you continue to read, it then says, "with a ...
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So can we just draw 500 mA from any USB port without enumeration now?
The USB Type-C Spec R2.0 defines the USB Type-C Current feature, in which the power Sink observes the voltage on the CC pin to determine how much current is available from the Source, which falls into ...
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I have a solar panel with below specifications. I have some questions
As in picture Vmp = 17.40V and Imp = 0.58A implies Power =
17.40*0.58 ≈ 10W.
Does it provide 0.833A (10/12) at 12 volts?
What does "Max. System Voltage 800VDC" mean in the picture ?
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