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Questions tagged [ideas]

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votes
3answers
104 views

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 ...
0
votes
1answer
106 views

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 ...
-1
votes
1answer
70 views

Ideas needed for a project with a lot of buttons [closed]

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 ...
0
votes
2answers
67 views

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 ...
1
vote
2answers
2k views

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 ...
-2
votes
1answer
73 views

Get status of syringe without power supply [closed]

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 ...
2
votes
4answers
3k views

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 ...
2
votes
0answers
87 views

Is it practically possible to use mutually coupled capacitors as we use mutually coupled inductors? [duplicate]

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. ...
0
votes
1answer
99 views

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?
17
votes
2answers
10k views

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 ...
2
votes
4answers
391 views

What's a fun electronics related gift for 2012? [closed]

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 ...
0
votes
2answers
149 views

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.
2
votes
4answers
4k views

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, ...
5
votes
3answers
633 views

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 ...