# Tagged Questions

82 views

### Electro-magnetism. What's it all about anyway? [closed]

Ok, so am new to electronics. I've been looking up various thing like basic theory, schematics, circuit components, logic gates, and the rest. So all of that (on an extremely basic level anyway), I ...
129 views

### What mechanism happens inside an inductor from the point when potential difference is applied?

What happens when a potential difference is applied across an inductor? I am trying to get a picture of mechanism from start, just after potential difference is applied in detail? In resistor we can ...
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### Ground plane and magnets

I am making a wheel encoder out of a Hall Effect sensor with magnets in a concentric circle on the wheel. The Hall effect sensor is on a 2-layer 9x5mm pcb. I usually fill in the layers by drawing a ...
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### Electromagnet duty cycle

I have a project where I would like to use an electromagnet to lift an item for a longer period of time. I was looking at a magnet like this one: ...
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### Electromagnet interference with motorcycle

I just got a sport bike which the frame is aluminum the engine is aluminum the swing arm as well. Basically this bike is made up of mainly aluminum and plastics with very little steel or any other ...
301 views

### Amperian loop to measure solenoid's magnetic field

My textbook proves the formula $B =\mu_0In$ for a solenoid by taking a rectangular Amperian loop as shown here: The problem I see with this though is that it only takes into account the ...
389 views

### magnetic field outside solenoid

It is written in our course book that the magnetic field outside a solenoid is negligible and almost zero. Why is it negligible? Is it negligible compared to the field inside solenoid or is it nearly ...
343 views

### Differences between a planar coil and coplanar waveguide to create a local 1D AC magnetic field

Coplanar waveguides (for example picture look here) are often used in research to create a local in-plane magnetic field. Now if compared to a planar microcoil like this, driven by a AC voltage in ...
874 views

### How to convert a three wire hall effect sensor to a 2 wire sensor?

Would there be any possibility to convert a three-wire hallsensor to a 2-wire equivalent. The connections are a V+, GDD and OUT. The voltage between V+ & GDD would be 24V and the OUT port would ...
128 views

### Automobile ignition coil (spark coil)

Question: How is this possible to get 1:1000 electric potential scale while primary/secondary loop scale is only about 1:100?
189 views

### Controlling temperature of a water bath with induction plate

I am thinking of building a sous-vide cooker using some kind of prebuild heater, controled via an AVR and temperature sensor like the LM35. There are a lot of references around using rice cookers, ...
287 views

### Building a coil for galvo motor

I'm building myown galvo motors and for that I need some coils that I'll have to build myself to fit into the dimensions I need. Is there any technique for winding the wire or is it just straight ...
259 views

### Sending data over a magnetic field

I need to find a way to trigger this Hall Effect Sensor with a non-permanent magnet. Does anyone know if an inductor's magnetic field would be strong enough? Or am I going to have to build an ...
111 views

### Fine-grained sensing of distance between two permanent magnets

(disclaimer: bit of an electronics newbie here) I have a bunch of little magnet ball-bearings that I was playing around with the other day. I formed them into a strand, then fixed both ends leaving ...