Hobby Electronics Basics

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Caps for Short Term Mobil Energy Storage

Some dreamer once wanted to use "super" capacitors to power a road EV but the energy density is still too low. By one c...
44 comments posted 18yrs
posted by BretCahill
44 comments posted 18yrs posted by BretCahill

Explanation of Parallel Resistor and Diode

I had difficulty choosing keywords to narrow the search enough to give me any solid hits for this, and I hope this ques...
2 comments posted 18yrs
posted by jackpanella
2 comments posted 18yrs posted by jackpanella

Circuitest 2000S and 2100 scanner

Hello everyone, I'm new to this group and would like to ask your help regarding this Circtuitest 2000S. This has been s...
3 comments posted 18yrs
posted by dulayjim
3 comments posted 18yrs posted by dulayjim

Switch 3A with a small reed switch

Hi there, I'm wanting to switch around 3A using a reed switch (eg http://www.dse.co.nz/cgi-bin/dse.storefront/en/produc...
0 comments posted 18yrs
posted by jmunrohill
0 comments posted 18yrs posted by jmunrohill

Resistor grid puzzle

Imagine a rectangular grid of 1 ohm resistors, 3 on a side like this: A ___ ___ ___ |-|___|-|-|___|-|-|___|-| .-. .-. ....
11 comments posted 18yrs
posted by phantom
11 comments posted 18yrs posted by phantom

UPS for 12V DC ?

I am looking for some ideas. I have an answering machine runnning off a 12 VDC transformer. Whenever power goes out, I...
25 comments posted 18yrs
posted by andy77017
25 comments posted 18yrs posted by andy77017

power supply mods

I've finished the standard "build yourself a adjustable power supply" project and some small others. I was looking at t...
8 comments posted 18yrs
posted by huwdixon
8 comments posted 18yrs posted by huwdixon

More Compromised Reasoning

> > Like trying to use the 0.5 hp example without posting the diesel > > equivalent? > The example was just that; a way...
0 comments posted 18yrs
posted by BretCahill
0 comments posted 18yrs posted by BretCahill

How To House Train A Puppy

> >> >> >Three months and $100,000 in diesel to plow a field? > >> >> As I recall, someone verified that the 1/2 MPH wa...
2 comments posted 18yrs
posted by BretCahill
2 comments posted 18yrs posted by BretCahill

Capacitor voltage values

Let's say I need a cap that's 100uF, 10V. Is there any issue with using a Cap with a bigger voltage rating? I would thi...
3 comments posted 18yrs
posted by tvisitor
3 comments posted 18yrs posted by tvisitor

One time PCB needed

Hi, I am new to tis group but I have built a lot of kits over the years so I am not all that new to soldering. I have a...
8 comments posted 18yrs
posted by davenpete
8 comments posted 18yrs posted by davenpete

Can anybody find my error? (wireless RF modeling)

Hello, I'm simulating a network of multiple wireless nodes that can transmit to one another using finite battery resour...
1 comments posted 18yrs
posted by osheikh81
1 comments posted 18yrs posted by osheikh81