Questions tagged [ideas]
15 questions
20
votes
2 answers
How do I use a transformer as an inductor?
Lp: Self inductance of the primary winding.
Ls: Self inductance of the secondary winding.
Lm: Mutual inductance between the primary and secondary windings.
Assume that I need an iron core inductor with large inductance to use under 50Hz or…
hkBattousai
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5
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3 answers
Project ideas for five hundred AT89C52s?
I happen to have some 500 old AT89C52 controllers and am looking for ideas how to use them in a project. That's an 8051-based controller with 8K Flash, so you get an idea. And no, trashing them is not a project! :-)
I remember that in the 80s Steve…
stevenvh
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2
votes
1 answer
Transparent Screen Selection
We are as a team with four members intending to design an augmented reality oriented smart glass which shall contain a CMOS camera, wireless communication and transparent screen. The algorithm below as flow diagram.
simulate this circuit –…
emre iris
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2
votes
3 answers
Changing output voltage of a buck converter by electronically swapping the feedback resistors
I am going to design a circuit which is going to output some digital signals. The output stage of the circuit will have some level shifters. The level shifters will give flexibility to the user to choose the voltage level (1.8V, 3.3V or 5V) of the…
hkBattousai
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2
votes
4 answers
What's a fun electronics related gift for 2012?
My cousin's 19-year old son has a birthday coming up and he is quite intelligent with computers, software and electronics. What's a fun / serious electronics-related gift I could buy him? Anything from robotic kits to electronic development…
Robin Rodricks
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2
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2 answers
Is this NPN transistor AND logic gate practical?
Most places on the internet that I see give a schematic for an AND gate that is something like this:
simulate this circuit – Schematic created using CircuitLab
The only thing about this is that when B is turned on but not A, which should logically…
Cello Coder
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2
votes
4 answers
What is an appropiate way to isolate a DC signal?
The question might sound kind of funny, but I'm unsure how else to word it. So...
Pictures!!
Currently, I have a setup like this:
simulate this circuit – Schematic created using CircuitLab
What I would like to have is something like this:
simulate…
efox29
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2
votes
0 answers
Is it practically possible to use mutually coupled capacitors as we use mutually coupled inductors?
Inductor and capacitor are dual to each other in Physics. One comes from Electric Field Theory while the other one comes from Magnetic Theory; the both theories expose strong duality with each other. Sometimes we can replace an inductor with a…
hkBattousai
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2
votes
4 answers
Why we need to complete circuit
Why can't we light an LED with a single positive wire on the anode, leaving the cathode unconnected?
Let's suppose I connect a wire with a positive voltage to the anode of the LED. Now, I think, current will flow past the light emitting diode. …
Zain
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0
votes
1 answer
Current splitter/divider in nA/pA range possibilities
My objective is to realize a current splitter which could split current from a wire A in the range of pA, nA equally to wire B,C.
I was initially sure what this type of circuit would be called, but google redirected me to Current Conveyors page -…
sundar
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0
votes
2 answers
Do we have a material that reshapes itself depending on applied voltage or electromagnetic field?
I am thinking to control the physical world by applying signals to a magical material.
The material must have the ability to change its strength from a very solid state to a dough like state back and forth. So for example if I want to grip an object…
Dr. Ehsan Ali
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0
votes
2 answers
Electronic pan/tilt camera
Is it possible to conceive of a system that would use a stationary camera with a fish-eye lens to effectively provide the same images as a camera that was actually panning and tilting.
Zippy
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0
votes
1 answer
Board Input DC voltage
I need to receive a 24V signal from an automated industrial system. The receiving board is a UDOO system that its I/Os can handle voltages until 3.3V.
Any ideas on how can I make things work?
-1
votes
1 answer
Ideas needed for a project with a lot of buttons
Alright so this may sound very weird. Even though I'm 19 years old, I still like electronics with a lot of LEDs and buttons and pots and switches. You know what I'm talking about.
I saw this video on YouTube by Make…
Owais
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-2
votes
1 answer
Get status of syringe without power supply
I have to build a "usage status indicator" for a syringe.
Conditions are as follow.
1. if syringe is used for 3 times, it should show some indication.
2. if syringe is used less than 3 times, it should show some other indication.
can any one suggest…
ashish
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