Go Down

### Topic: Basic electronics (Read 824 times)previous topic - next topic

#### Xirzonas

##### Jun 26, 2014, 10:26 am
Hello,

I'm completely new to electronics, and I'd like to understand how some basic electronics work like voltages and resistors etc. does anyone know a good tutorial that covers this all for 'noobs'?

#### JimboZA

#1
##### Jun 26, 2014, 10:34 am
Hi....

I think this is a good site.

Jim
Johannesburg hams call me: ZS6JMB on Highveld rep 145.7875 (-600 & 88.5 tone)

#### cjdelphi

#2
##### Jun 26, 2014, 01:14 pm

Hello,

I'm completely new to electronics, and I'd like to understand how some basic electronics work like voltages and resistors etc. does anyone know a good tutorial that covers this all for 'noobs'?

There is no "one covers all" there's so much to learn... I suggest you pick an area of interest first then work towards your goal, but to kick start you off, ohms law get your head around voltage, current,  resistance, then you'll find that electronics is a lot easier to learn.

#### Xirzonas

#3
##### Jun 26, 2014, 01:20 pm
Thank you! I did read a lot about ohms law already and I understand how it works, but I got another question. How do I know what the maximum mA of (for example) a LED are?

#### cjdelphi

#4
##### Jun 26, 2014, 02:15 pm

Thank you! I did read a lot about ohms law already and I understand how it works, but I got another question. How do I know what the maximum mA of (for example) a LED are?

First you consult the led's datasheet, it may say max current 40ma but typically 20ma.

Vcc - led's vf  / 0.02
= Resistors value  for led. (Ohms law)

#### AndyCC

#5
##### Jun 27, 2014, 12:39 amLast Edit: Jun 27, 2014, 12:44 am by AndyCC Reason: 1
I really enjoyed Platt's "Encyclopedia of Electronic Components" for basic information about what parts do what.

http://www.amazon.com/Encyclopedia-Electronic-Components-Volume-Transistors/dp/1449333893 - so far he's got Volume 1 out, but is delayed on Volume 2.

Another of Charles Platt's books, "Make: Electronics"  (http://www.amazon.com/Make-Electronics-Discovery-Charles-Platt/dp/0596153740/ref=sr_1_1?s=books&ie=UTF8&qid=1403822463&sr=1-1&keywords=platt+electronics) wasn't a bad intro to basic theory and practice.

#### larryd

#6
##### Jun 27, 2014, 01:03 am
No technical PMs.
If you need clarification, ask for help.

#### fungus

#7
##### Jun 27, 2014, 03:14 pm

How do I know what the maximum mA of (for example) a LED are?

You look in the datasheet that goes with it.
No, I don't answer questions sent in private messages (but I do accept thank-you notes...)

#### JimboZA

#8
##### Jun 27, 2014, 03:21 pm

How do I know what the maximum mA of (for example) a LED are?

You look in the datasheet that goes with it.

.... except that most of the time LEDs have no provenance, in which case the table half way down this page may help.
Johannesburg hams call me: ZS6JMB on Highveld rep 145.7875 (-600 & 88.5 tone)