6

The symbol represents a common mode choke. They look like these: (Source) There are SMD versions as well. They are used to block common mode noise i.e. noise incident on both lines of power supply. In the picture above (Source), you can see that common mode noise is coming on both lines in the same direction. At the same time, power is also coming on ...


4

This is certainly possible. There are DC/DC converters made exactly for this purpose. You might want to google for "dc/dc atx power supply 12v". These converters are available at different power ratings. Many of them are designed for carputers (computers in cars). In the picture you see a small one providing 80 W power. It is mounted as part of the ATX main ...


3

Two silicon diodes in series will knock 1.2V off the supply, getting you 15.3V perhaps use a 15A rectifier bridge connected in reverse, add a heat-sink. simulate this circuit – Schematic created using CircuitLab


3

You have measured the impedance matrix (Z-matrix) of the device. If you invert the matrix, you will have the admittance matrix (Y-matrix) of the device. The Y-matrix will have positive entries on the diagonal and negative numbers for the off diagonal. You are familiar with resistance. The name for the inverse (1/R) of a resistor is an "admittance". Think ...


2

The testbench below is answer to my question. The result of conversion is stored in slv. The input file contains a column of real numbers of the type I mentioned in the question i.e single preciousion floating point numbers generated from a program probably written in C or C++. As expected, there is difference between real1 and real2 which is another thing I ...


2

Simply put, it does not. It will deliver its rated output while being able to use a supply within the range specified. If the voltage is at the high end (230V) then the required input current will be lower, if the input voltage is at the low end then the current goes up.


2

The main problem here is that Mouser have included a rubbish specification from an unknown source - nobody quotes mW flux for white LEDs. mW are quoted for very short wavelength ble end of spectrum LEDs that are used for applications where their short wavelength results in super-low lumen figures but gives high energy per quanta - eg applications such as ...


2

You can use whatever base you want, as long as you use the same limit to your number range. For example, here's how 16-bit two's complement would work with decimal numbers: 2s_comp = 0b10000000000000000 - number = 0x10000 - number = 65536 - number Number Decimal 2s_Comp_Hex 2s_Comp_Dec 0xA451 42065 5BAF 23471 0xE227 57895 1DD9 ...


2

What you're doing is still safe, since you're still performing twos-complement operations on a signed integer, just with hex representations of the integer shown as you perform operations. (0xFFFF - 0xA451) is the same thing as (0b1111_1111_1111_1111 - 0b1010_0100_0101_0001) which is just flipping the bits. Next, adding 0x1 modulo 0x10000 is the same as ...


2

Crosstalk or ground shift? I experienced monotonicity errors with my 1st 12bit 20MHz ADC from Burr Brown in hybrid package screened to Mil-Std-883B. circa '77 All I did was use a sawtooth input to ADC and use the output to a reliable DAC back to analog and display in an XY scope mode and look for staircase monotonicity errors. instead of a box confined to ...


2

I recently released an open source tool for converting SystemVerilog to Verilog. It covers many of the differences highlighted by the other answer. Check it out at https://github.com/zachjs/sv2v.


1

There is a hidden error of negative common-mode voltage on Vin due to the bipolar input. A simple solution is to pull both Vin+/Vin- up with 220k To 3.3V or the equivalent circuit to make Vcm increase within the Rail to Rail limits with some margin. (0.4V) simulate this circuit – Schematic created using CircuitLab


1

This is not an answer, per se. It is an exploration of how the results of 7 - 4 = -2 and 4 - 7 = -4 could happen. 7 0000 0111 0000 0111 7 0000 0111 7 -8 1111 1000 + 1111 1100 -4 + 1111 1011 4 inverted ------------ ------------ 4 0000 0100 0000 0011 ...


1

You could buy a US to Norway AC plug adapter. These are a few euros/dollars online, and are often used by Americans visiting Europe. Edit: I mean a passive adapter that reconnects the pins without changing the voltage.


1

Both parts are listed in the same datasheet The amount of flux is easy to compare. The color will be a little different, but the 227 (2200k color) part will be brighter.


1

The cone angle 2θ =65.65° where the cone 2x half-angle projects an area onto the sphere defined by \$A=r^2\$. Thus scaling the total beam angle over the std. cone angle , you can estimate the total lumens. This is a good estimate for this type with the angle given always at half peak power. Lumens = luminous Flux/steradian * beamwidth / 65.65 deg/...


1

It sure looks like a typo to me. The only way the values 0x92 and 0x07 would make sense is if each byte is split into 4-bit nybbles, and the least-significant nybble is sent first, but the nybble itself is sent MSbit first — which would be truly bizarre. The more likely explanation is that the author forgot to flip it in his head when reading the ...


1

From the comments: [Transistor] Gray code has one bit change per count. What will happen yours when you rollover from 9 to 0? [Peanuts] I see what you are pointing out. In my table, to rollover from 9 to 0 will require 3 bit change and that is impossible for gray code. Correct. Now, what are the possible Gray (note capital) codes for '9'? Which of ...


1

This answer is not exact but should help to provide at least a good intuition. In a word the answer is "decimation". As explained in this Maxim tutorial and other places, the front end of a delta-sigma ADC yields a 1-bit data stream: The output of the sigma-delta modulator is a 1-bit data stream at the sampling rate, which can be in the megahertz range. ...


1

In theory, you could connect a 375V~400Vdc battery where the PSU converts AC to DC. Possibly get a used 2016 Nissan Leaf battery pack that operates at 375V and hot wire it into the PSU and operate it for 100h. In theory yes, but lethal if you make just a little mistake. UPS solutions with large batteries, seem to be the best choice if you cannot ...


1

I'm getting similar results with a small 12v load in my application. I've tried more than one supply. Some shutdown, others don't. ALL are new, out of the box supplies. I'm thinking it has to do with flakey short circuit or over current protection circuitry in some power supplies.


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