# Tag Info

0

The hinge will be similar to the one for the laptop monitor. You can search "hinge for LCD monitors" such as this page.

3

There's nothing like kicking the dirt. I would advise actively participating in a manhole inspection, at least once so you know what it like. Do an inspection with an experienced person. By doing so you will have first hand experience of what is involved and what can and can't be easily seen or done via such inspections. Doing more such inspections would be ...

1

I don't think you want LIDAR. From what I have seen (and my experience is limitd), LIDAR, when it is referred to as LIDAR at least, is only accurate to a few cm. You aren't going to see cable defects with that. But instead of using putty to mold impressions of your teeth, orthodontists now use this handheld scanner. It has a rotating mirror in it and they ...

2

Capacitance only depends on its geometry, ... False. Capacitance is also determined by the dielectric (the insulator) between the plates and this can have a huge effect on the value obtained. ... but the charging and discharging of the capacitor depend on a resistive load within the circuit. The load doesn't have to be purely resistive but we'll go with &...

0

With "little" equations ... for real and ideal opamp.

1

From the values 198 to 242 ohm. What does this mean? If you measure the resistance of the resistor, it should measure a specific value in this range at room temperature, if it is within tolerance. This value can change as the resistor warms up. The value is determined by the manufacturing process. A batch of resistors would have values falling around the ...

0

Ohm's thermal law used by electronics engineers for the sizing of radiators is a law formulated by "analogy" of electrical and thermal equations. As soon as the correspondence is established between analogous quantities, it is therefore possible to use electronic tools to solve thermal problems. In this case, the heat sources (temperature °K) are ...

0

For question 1: The silver band stands for a tolerance of ± 10% this equals a range from 90% to 110%. you just added/subtracted the absolute value of 22Ω but wrote 22%, this is wrong. It should be 90% * 220Ω = 198Ω for the lover limit and 110% * 220Ω = 242Ω. Or ±10% * 220Ω = ±22Ω and then doing 220Ω ± 22Ω. For question 2 The polarity of carbon composition ...

4

For the USB signal, you have to make a 90 Ohm characteristic impedance twisted pair. The characteristic impedance depends on the insulator and on the outer/core diameter ratio of the wires. Search online calculators on the net. A simple way to twist wires: connect the two wires making a long wire twist the wire using an electrical drill put the wires ...

21

Even aside from the fact that no outer sheath and no shielding makes me cringe, there are a couple of big issues with your custom cable: The data lines (pins 2 and 3) need to be a twisted pair. Period. USB uses differential signaling, and at the frequencies involved, the signaling lines need to be a twisted pair so that they actually behave correctly. The ...

23

The most prosaic reason why your cable doesn't work and is drawing too much current is that you connected he wrong pairs of pins and/or some of the the wires are shorted together. If that is not the case, there are two obvious problems: A USB cable that meets the specifications has two twisted pairs of connectors enclosed in an outer shield, not four wires ...

3

The device is likely not getting the power it needs. Use a thicker wire to ensure the resistance is the same as the original. Don't make an induction coil with your cable. It also helps to use twisted pair - see some of the faster ethernet cables for reference. You twist the two ends of a corresponding signal to preserve integrity. Since an approximately ...

0

There is a useful calculator at https://rechneronline.de/wind-power/

0

Alibaba is the best place to begin sourcing parts. If your quantity is high enough many of the manufacturers can also customize. Here are a few of the many Alibaba manufacturers: PMMA (acrylic) lenses Glass Lenses Polycarboneate Lenses The lenses are made by injection molding; the mold is cut (and subsequently polished) out of steel or aluminum by a CNC ...

3

Another way to understand why kVA is different to kW, is the Power triangle. Figure 1: power Triangle (source: Electrical technology) The power triangle shows that the total (apparent) power is the vector sum of the active (or real) power and the reactive power. Active Power $P$: this is the actual power that its used/is available (electrical engineers ...

1

Sorry, but these are great educational devices. Adafruit.com sells GPS receiver boards, ~30-USD. These can talk to small SBC (single board computers) such as Gemma M0, 10-USD, Trinket M0, 9-USD, and many others, even arduino.cc devices. Lots to choose from and highly versatile. Even Raspberry Pi. Search the first listed site for GPS, then Gemma M0, and then ...

1

Be careful: "efficiency" usually means the ratio of energy applied to energy removed from the "cold side" object. Since a Peltier junction has a fixed delta-T , you won't get any colder by increasing the heat-sink capability. You will get to the cold limit faster, or even get to a lower temperature if you use cold water instead of room-...

0

An amplifier doesn't increase power for free. It takes a signal with not much power, and a power supply and outputs a signal with lots of power. The extra power (in fact, usually all of the output power) comes from the power supply. Where is the power supply for your amplifier? That is what is powering the whole system. You may as well connect it directly to ...

0

In general, it is not possible and it will not work because of law of conservation of energy. For every energy conversion, you will lose a bit of energy. You can invent many similar circular schemes, for example, solar panel - the light bulb, motor - generator, weight going down and from the energy getting from moving down, going up again, water going down ...

0

First note that DC is more efficient at transferring power long distances. AC is typically chosen because it is easier to change the voltage via a transformer. An equation always needs a variable. If you arbitrarily specify all the values one value will never match the equation. To back up for future readers Ohm's Law is V=I*R and for power P = V * I In your ...

Top 50 recent answers are included