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Yes, we have used them in physics experiments a lot. Good old days. We have also drawn the characteristics of a triode valve using regular voltmeters and ammeters. Another device was a tangent galvanometer that was useful to measure the charge stored.
They have a rectangular coil of very fine...
It comes from some logs. I mean logarithms. (it was introduced as a torture device for young students).
Obviously efficiency cannot be greater than one. And it must be greater than zero. Log of a number 0<x<1 is a negative number.
Some wise men decided to make numbers large by multiplying with...
Crystal oscillators use, you guessed it, a crystal. The crystal must be piezoelectric. Common piezoelectric crystals are quartz and synthetic titanates.
The electrical frequency is the same as the mechanical crystal oscillation frequency. The mechanical crystal oscillation frequency depends on...
This is very interesting! I would have expected that efficiency would drop with decreasing R or increasing output current.
But then I note that you have not defined the efficiency. for this circuit, I would "dumbly" define efficiency as the ratio of output power to input power.
I would also...
If you are sure about the editor you have used on the current desktop /laptop, I would suggest the following:
search for all the linux editor names. Which distribution of linux you are using?
see the editors that are installed on your machine.
try them one after another and see which one you...
Absolutely right. On the other hand, it is better to control the temp at the destination and not at the source.
The oscillation may not be serious for a room heater (because of the large thermal mass, it may not even be felt) but it can be nuisance in some other application (say for example in...
As you are sure that the existing thermostat is simply on-off, you can certainly put it off the circuit. You can use a triac based (like ones used in light dimmers) regulator with the basic heater core of the wall mounted convection heater.
As you mention rightly, it is wise to leave the...
If you look hard, they are not clear but slightly gray. You can add any color to the plastic but the conductivity is determined by the small amount of carbon powder added to the plastic.
To be effective ESD safe, the conductivity should not be too low or too high. Wise men have decided some...
You say that the diameter of the copper conductor you measured is 1.2mm. This will give a cross section of (pi/4)*1.2*1.2 or about 1.13 mm2. But the label on the roll says that the conductor cross section is 2.5mm2.
Something is not right.
If the wire is stranded (multiple round conductors)...
They are copper plated with tin. Tin gets covered with an oxide layer but this oxide is soluble in the solder flux.
Tin alloys well with copper and the connection is ohmic.
The lead resistance will be in the microohm range (10-100 microohm)
This is close to the value of a well soldered PCB...
Mutual inductance depends on the relative orientation and distance (center to center) of the two inductors. Plus it will also depend on the environment ((one side may be blocked by the PCB board, copper conductors etc).
Except in the simplest cases (both has their long axis parallel and the...
Your question is not clear enough.
You want an array with 10 bit res; that means you will have 2^(10) or 1024 distinct elements or steps.
Each step will give you 1 bit resolution. That is how I understand it.
For a mechanical switch, this means 1024 distinct position.
You want a log scale...
So this is an induction motor. Usually they have poor starting torque and bigger size for the same power (say a universal motor; one with brushes). You cannot increase the power beyond the rated one (perhaps you can go about 10-20% over the current limit with some luck) and the poor starting...
Blacklight bulbs are fluorescent lamps and they have high resistance when cold (not operating) and low resistance when on (operating). In fact, they should be run from a current driver (a series resistor will do) for a reliable operation.
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