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1
vote
2answers
100 views

How can I create a theatrical spark ejector?

I'm involved with an amateur theatre company (I do lighting, audio etc...) and would like to simulate a switch short-circuiting. I have also done a bit of magic in my time and have used "spark ...
20
votes
4answers
2k views

Building a hobbyist oscilloscope

I have a project that I've been thinking about for a little while, and I've come to the realization that at some point during its development, I'm going to need an oscilloscope. Okay, not a problem. ...
2
votes
1answer
123 views

Using an Arduino to Emulate a CD4021 Shift Register for Controlling an NES

This is probably a silly thing to do when I could wait for my CD4021s (74HC165Ns) to arrive and save myself the hassle but I feel as though this can be done and I'm simply missing something. I've ...
0
votes
1answer
72 views

Should I use Mathematica to understand circuit behavior? [closed]

I've just started learning about circuits from the "Foundations of Analog and Digital Electronic Circuits" book. KCL, KVL, element laws and linear circuits were easy to grasp but then I got the ...
0
votes
1answer
319 views

Trigger a relay with a very low DC voltage

I want to light up a couple of LEDs using a relay to trigger this event. I have a very low DC voltage, about 0.15mV to 0.20mV and I want to somehow take this voltage to a relay, that will be also ...
6
votes
4answers
151 views

Ideal location to practice soldering

Sounds like a stupid question, but really hasn't been asked before, or I haven't found a post about it. Either way, here it is: I bought a soldering iron recently and am looking for a place in my ...
-1
votes
1answer
93 views

What are some interesting sensors? [closed]

I'm becoming more or less an electronics hobbyist. I work with digital electronic stuff. I have a Hawkboard, Beagleboard and Arduino which generally have multiple digital or analog input lines. I was ...
6
votes
2answers
280 views

What are the characteristics of a memristor?

This is an in-spirit follow-up to my earlier question. So I'm an electronics hobbyist, and I've been curious for a while about the proposed new component, the memristor. My research has turned up ...
6
votes
4answers
230 views

Does it make sense to measure components in-circuit in order to prove non-functioning?

When an electrical circuit is not working properly does it make sense to use a multimeter to measure/test the individual components in-circuit (without soldering them out), e.g. measure transistor ...
3
votes
3answers
215 views

EE for Software engineers [closed]

Recently I've started playing a lot with 3D printers, Adrunio, Pandaboards and Kinect's SDK. I'm starting to have more and more passion for this sort of devices and I think it's about to turn into a ...
1
vote
6answers
1k views

How to hand drill PCBs?

Drilling 300 holes in fibre board is tedious, difficult to do neatly and prone to snap bits. What simple methods and tools are available to the home user to drill PCBs effectively? In my case it's ...