Electronics guide part 1 - bit-tech.net Forums

WilHarris · 29th Apr 2005, 08:19

www.bit-tech.net/article/163

<A88> · 29th Apr 2005, 08:54

Brilliant

Been looking for an electronics guide to suite my n00biness and this fits perfectly. Bring on Pt2!

<A88>

g0th · 29th Apr 2005, 09:09

Great stuff.

I would like to make a couple of suggestions.

When calculating resistors for LED use, remember to work out the power dissipation in the resistor and choose a resistor that can handle it.

This is almost never a problem for 1 or 2 LED's, but put a heap of LED's in parallel and you can start burning resistors.

Because LED's are a PN junction device, the potential across them is fixed, provided the supply voltage is at least the forward voltage. This is what makes it possible to choose a resistor to limit the current from a suitable value.

Feel free to take or paraphrase material from here,

http://forums.bit-tech.net/showthread.php?t=88511

But if you do this i would like to be credited in the article.

I'd be happy to make suggestions / comments / help write future parts.

RotoSequence · 29th Apr 2005, 17:20

Great to see an electronics guide on bit-tech at long last

Good job, Acrimonious; I look forward to reading part two

Zidane · 29th Apr 2005, 17:23

cool first part, makes a lot of sense. hopefully this will stop me posting "help, im a n00b!" posts int he electronics forum...

eagerly looking forward to the full series, and creating some cool stuff to make my cases a little more whizz-bang

Nath · 29th Apr 2005, 18:04

Looks very useful, will stay tuned for part 2!

Hippo · 29th Apr 2005, 18:16

Good beginners guide, I cant wait for the section on Thevenin and Nortons theorems

Fatboy · 29th Apr 2005, 20:09

WooooO00o0o0o0o0o0 yay.

A modding article for a change

Very well written, if i 'twas a noob id understand that well!

Certainly easier than Q= 1/2CV^2 or other pants like that.

mannafig · 29th Apr 2005, 20:22

at last a beginners guide that i can understand.looking forward to part 2

Alwayz Dead · 29th Apr 2005, 21:05

Great stuff

I'm not the most prolific poster but I use BitTech as a source of reference a great deal and this addtion makes it only more useful.

Nice one

g0th · 30th Apr 2005, 03:55

Quote:

Originally Posted by Hippo

Good beginners guide, I cant wait for the section on Thevenin and Nortons theorems

You wouldn't really use them in basic practical modding electronics

Etacovda · 30th Apr 2005, 05:37

rough guess here (a guess, mind you)

hes being sarcastic/joking...

Sc0rian · 30th Apr 2005, 08:52

sweet.

Nice one acrim.

- S

Hippo · 30th Apr 2005, 09:19

Off Topic: Interesting how the New Zealander understood the sarcasm and the aussie didnt. Read into it what you will

gmail · 30th Apr 2005, 13:37

ye, thats a really good guide for noobss like me

nleahcim · 3rd May 2005, 00:59

Last time I checked, current was a flow of positive charge, not of electrons.

g0th · 3rd May 2005, 05:16

In the majority of cases, current flowing through solid metals, or graphite, etc, the sole charge carriers are electrons.

nleahcim · 3rd May 2005, 07:36

Quote:

Originally Posted by g0th

In the majority of cases, current flowing through solid metals, or graphite, etc, the sole charge carriers are electrons.

Correct.

That still doesn't change the fact that current is the measure of postive charge flow.

g0th · 3rd May 2005, 08:52

Yeah, you're talking about 'conventional current', which is one of the Stupidest Things Ever.

acrimonious · 3rd May 2005, 10:32

Quote:

Originally Posted by nleahcim

Correct.

That still doesn't change the fact that current is the measure of postive charge flow.

Thanks for taking an interest.

I see where you're coming from - but positive charge arises due to electrons flowing in the opposite direction. The more electrons flow, the greater the 'positive charge flow' and so the greater the current.

In some respects I am wrong to say that electricity comes about due to electrons as electricity can arise due to proton flow in liquid metals - however I'm just going to be working with Molexs, not mecury, so for the first part of the guide at least, I think this level of understanding is far more than enough.

29th Apr 2005, 08:19	#1
WilHarris Just another nobody Join Date: Jun 2001 Location: Oxford Posts: 2,671	Electronics guide part 1 www.bit-tech.net/article/163

29th Apr 2005, 08:54	#2
<A88> Trust the Computer Join Date: Jan 2004 Location: Bournemouth Posts: 4,797	Brilliant Been looking for an electronics guide to suite my n00biness and this fits perfectly. Bring on Pt2! <A88> __________________ TheCounterfit.co.uk Twitter Facebook Last.fm Flickr! FriendFeed

29th Apr 2005, 17:20	#4
RotoSequence Lazy Lurker Join Date: Jan 2004 Location: 'States Posts: 4,529	Great to see an electronics guide on bit-tech at long last Good job, Acrimonious; I look forward to reading part two __________________ Technology Schmecnology

29th Apr 2005, 17:23	#5
Zidane Hypermodder Join Date: Apr 2004 Location: At my desk. Posts: 687	cool first part, makes a lot of sense. hopefully this will stop me posting "help, im a n00b!" posts int he electronics forum... eagerly looking forward to the full series, and creating some cool stuff to make my cases a little more whizz-bang __________________ You dont need a reason to help people. `Zidane Tribal. Bit-Tech Folding@Home Team 33346 -> here Join the Bit-Tech Folding@Home team -> here need a hand joining or setting up? ask us on the bit-tech forums -> here

29th Apr 2005, 18:04	#6
Nath Your appeal has already been filed. Join Date: Dec 2003 Location: UK Posts: 2,410	Looks very useful, will stay tuned for part 2! __________________ om nom nom nom

29th Apr 2005, 09:09	#3
g0th Supermodder Join Date: Apr 2005 Location: Melbourne, Australia Posts: 319	Great stuff. I would like to make a couple of suggestions. When calculating resistors for LED use, remember to work out the power dissipation in the resistor and choose a resistor that can handle it. This is almost never a problem for 1 or 2 LED's, but put a heap of LED's in parallel and you can start burning resistors. Because LED's are a PN junction device, the potential across them is fixed, provided the supply voltage is at least the forward voltage. This is what makes it possible to choose a resistor to limit the current from a suitable value. Feel free to take or paraphrase material from here, http://forums.bit-tech.net/showthread.php?t=88511 But if you do this i would like to be credited in the article. I'd be happy to make suggestions / comments / help write future parts.

29th Apr 2005, 18:16	#7
Hippo Smitten ;) Join Date: Mar 2003 Location: UK Posts: 709	Good beginners guide, I cant wait for the section on Thevenin and Nortons theorems

29th Apr 2005, 20:09	#8
Fatboy Bored Join Date: Oct 2001 Location: Rochester Kent Posts: 1,268	WooooO00o0o0o0o0o0 yay. A modding article for a change Very well written, if i 'twas a noob id understand that well! Certainly easier than Q= 1/2CV^2 or other pants like that. __________________ >[DFI LAN-PArty UT NF4 Ultra-D]-[Athlon64 3200+ Winchester]-[1Gb Corsair pc3200]-[Vapochill Micro]-[Powercolor ATI Radeon X800XL 256Mb]-[Chieftec DX-01-YL With 6 Fans]< Pug- "The spirit of modding is unleashing your creativity in the pursuit of individuality." Current Project: Unnamed Chieftec Dragon Mod

29th Apr 2005, 20:22	#9
mannafig Hypermodder Join Date: Apr 2004 Location: At home Posts: 807	at last a beginners guide that i can understand.looking forward to part 2

29th Apr 2005, 21:05	#10
Alwayz Dead Multimodder Join Date: Mar 2002 Location: Slightly south of lost Posts: 173	Great stuff I'm not the most prolific poster but I use BitTech as a source of reference a great deal and this addtion makes it only more useful. Nice one __________________ *Ain't nothing cooler than a small brown dog!*

30th Apr 2005, 05:37	#12
Etacovda Supermodder Join Date: Nov 2003 Location: New Zealand Posts: 306	rough guess here (a guess, mind you) hes being sarcastic/joking...

30th Apr 2005, 08:52	#13
Sc0rian Here comes the farmer Join Date: Feb 2003 Location: Suffolk Posts: 3,519	sweet. Nice one acrim. - S __________________ \o/

30th Apr 2005, 09:19	#14
Hippo Smitten ;) Join Date: Mar 2003 Location: UK Posts: 709	Off Topic: Interesting how the New Zealander understood the sarcasm and the aussie didnt. Read into it what you will

30th Apr 2005, 13:37	#15
gmail Modder Join Date: Feb 2005 Posts: 66	ye, thats a really good guide for noobss like me __________________ Sex Is Nice, Do It Twice

3rd May 2005, 00:59	#16
nleahcim Supermodder Join Date: Apr 2003 Posts: 550	Last time I checked, current was a flow of positive charge, not of electrons.

3rd May 2005, 05:16	#17
g0th Supermodder Join Date: Apr 2005 Location: Melbourne, Australia Posts: 319	In the majority of cases, current flowing through solid metals, or graphite, etc, the sole charge carriers are electrons. Last edited by g0th; 3rd May 2005 at 05:23.

3rd May 2005, 08:52	#19
g0th Supermodder Join Date: Apr 2005 Location: Melbourne, Australia Posts: 319	Yeah, you're talking about 'conventional current', which is one of the Stupidest Things Ever.