Simple explanation - Router Forums
 18Likes
  • 9 Post By harrysin
  • 1 Post By JOAT
  • 1 Post By harrysin
  • 1 Post By Cherryville Chuck
  • 5 Post By thomas1389
  • 1 Post By rwl7532
 
LinkBack Thread Tools Display Modes
post #1 of 10 (permalink) Old 10-13-2019, 04:22 AM Thread Starter
Honored Member
 
harrysin's Avatar
 
Join Date: Jan 2007
Country: Australia
First Name: Harry
Posts: 14,623
     
Send a message via Skype™ to harrysin
Default Simple explanation

of how a transistor works illustrated in an unusual way.
Attached Images
 
kp91, Wildwood, rwl7532 and 6 others like this.

Harry



Nothing but heaven itself is better than a friend who is really a friend. - Plautus






harrysin is offline  
Sponsored Links
Advertisement
 
post #2 of 10 (permalink) Old 10-13-2019, 05:55 AM
Registered User
 
JOAT's Avatar
 
Join Date: Apr 2010
Country: United States
First Name: Theo
Posts: 6,322
 
Default

It's about electric, might as well be magic, I don't understand either one.
jw2170 likes this.

"It ain't what you're told, it's what you know." - Granny Weatherwax
Fawkahwe tribal police SWAT Team
Some days, the supply of available curse words is insufficient to meet my demands.
.....Call me a craftsman, artisan, or artistic, and I will accept that. Call me an artist and you will likely get a quite rude comment in return. I am not a @#$%ing artist.
JOAT is online now  
post #3 of 10 (permalink) Old 10-13-2019, 10:16 AM Thread Starter
Honored Member
 
harrysin's Avatar
 
Join Date: Jan 2007
Country: Australia
First Name: Harry
Posts: 14,623
     
Send a message via Skype™ to harrysin
Default

Electronics appears these days in just about everything you buy, washing machines, phones,cars, variable speed routers "typewriters" etc, etc, etc.
graeme.c.payne likes this.

Harry



Nothing but heaven itself is better than a friend who is really a friend. - Plautus






harrysin is offline  
Sponsored Links
Advertisement
 
post #4 of 10 (permalink) Old 10-13-2019, 10:43 AM
Moderation Team
 
Cherryville Chuck's Avatar
 
Join Date: Sep 2010
Country: Canada
First Name: Charles
Posts: 15,274
 
Default

There are a lot of parallels between water and electrical flow. Such as “both will follow the path of least resistance”.
Danman1957 likes this.

Someone I consider a master woodworker once told me that a master woodworker is not someone who never makes mistakes. He is someone who is able to cover them up so that no one can tell.
Cherryville Chuck is online now  
post #5 of 10 (permalink) Old 10-13-2019, 01:23 PM
Registered User
 
Join Date: Jan 2012
Country: Canada
First Name: thomas
Posts: 1,394
 
Default

Quote:
Originally Posted by Cherryville Chuck View Post
There are a lot of parallels between water and electrical flow. Such as “both will follow the path of least resistance”.
Yes, and people too. I know a few of them that will do that.
thomas1389 is offline  
post #6 of 10 (permalink) Old 10-13-2019, 07:50 PM
Registered User
 
rwl7532's Avatar
 
Join Date: Sep 2011
Country: United States
First Name: Ralph
Posts: 1,288
 
Default

Now do PNP transistor.
RainMan 2.0 likes this.

  • Accident free since 10/27/12 at 3:58 pm.
  • Cursing free since 10/27/12 at 3:59 pm.
  • ...it happened in Everett, WA USA
rwl7532 is offline  
post #7 of 10 (permalink) Old 10-13-2019, 10:22 PM
Forum Contributor
 
DesertRatTom's Avatar
 
Join Date: Jul 2012
Country: United States
First Name: Tom
Posts: 16,717
 
Default

@Harry Sin It's sort of like feeding a bias voltage to a plate and a variable low voltage to the grid, which regulates the voltage exiting a triode amplifier vacuum tube or valve (as the Brits say). But in a digital system you only need on/off, or on full/on low. 1 and 0. My brother has designed such digital circuits for interplanetary probes. Circuits which use coded streams of instructions to produce a usable output string.

In a vacuum tube the regulation is of the variations in the voltage, which is much stronger than the regulating voltage in the grid. A lit up amplifier tube amplifies because the strong voltage of the grid is partially blocked or not blocked by the low input signal, say, from a microphone, phono needle crystal or other pickup, such as in a guitar.

A lot of the circuitry is about producing an absolutely smooth voltage to the emitter plate and other noise reduction circuitry. The signal from a microphone isn't anywhere near strong to move the coil of a speaker. But the bias voltage is. If you have big speakers, you use a series of tubes to keep amplifying the signal until it will drive a BIG coil and a magnetic field that is attached to the cone, which vibrates the air, which vibrates the eardrum. Cool, huh?

Harry, I hope I got that right, because that triode model has helped me understand this stuff a little better. The transistor is sometimes called a gate that's open or closed, vs a valve where the amount of flow produces the output signal. Kindly correct me if I have this wrong.
Attached Thumbnails
Click image for larger version

Name:	circuit.jpg
Views:	8
Size:	18.6 KB
ID:	375367  


The more I do, the less I accomplish.

Last edited by DesertRatTom; 10-13-2019 at 10:58 PM.
DesertRatTom is online now  
post #8 of 10 (permalink) Old 10-13-2019, 10:52 PM
Forum Contributor
 
DesertRatTom's Avatar
 
Join Date: Jul 2012
Country: United States
First Name: Tom
Posts: 16,717
 
Default

More: Recently I donated three Senhauser mics to the local little theater. They are ribbon mics that are mounted above the stage and pick up actors voices remarkably well. What makes them so sensitive is that the 50 volt bias voltage is connected to a solid gold ribbon that varies the output signal in a similar way to the triode tube, thus is has the effect of amplifying a weak mechanical (vocal vibratios) into a stronger signal at the pickup point. The ceiling is 4-5 feet above the actors. Anchored securely to the ceiling because it is so sensitive, it has made hearing the actors MUCH easier. Modern mixers all put out that bias voltage on the third wire on the connector. In the end, all microphones have some way of producing a variable power signal, that goes back into a pre-amplifier, then into either a powerful amplifier or a converter that turns the signal into a digital stream.

My theater conversion project has me rethinking and having to learn about such matters. And somehow, it's easier to learn if you try to teach it as you go.

So thanks Harry for posting this string.

The more I do, the less I accomplish.
DesertRatTom is online now  
post #9 of 10 (permalink) Old 10-13-2019, 11:20 PM
Registered User
 
Danman1957's Avatar
 
Join Date: Mar 2009
Country: Canada
First Name: Dan
Posts: 740
 
Default

Wow,

I don't try to follow technical advances in electronics, that's a rich man's hobby. I was surprised and also happy that LG came out the winner in my opinion. I'm sure the 8K is more $$$. I don't know how much these units cost but I know I like the LG quality. My LG TV is about 8 years old and my son wants me to get a new one that the internet can connect to I think it is called smart TV. My response is simple, as long as my current one is still working fine, I refuse to spend the $$$$. All our appliances are also LG the washer and dryer, fridge and stove. The dishwasher was here when we bought this house and when it has its last load, it will be replaced with an LG. Life is Good !

Don't fear your tools, pay attention and respect the tools and avoid injury.
Danman1957 is online now  
post #10 of 10 (permalink) Old 10-14-2019, 12:06 AM
Registered User
 
SweetJams's Avatar
 
Join Date: Oct 2019
Country: United States
First Name: Jamila
Posts: 10
 
Default

Yeah, you're right. It's a very simple explanation.
SweetJams is offline  
Reply

Quick Reply
Message:
Options

Register Now



In order to be able to post messages on the Router Forums forums, you must first register.
Please enter your desired user name, your email address and other required details in the form below.

User Name:
Password
Please enter a password for your user account. Note that passwords are case-sensitive.

Password:


Confirm Password:
Email Address
Please enter a valid email address for yourself.

Email Address:
OR

Log-in











Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
 
Thread Tools
Show Printable Version Show Printable Version
Email this Page Email this Page
Display Modes
Linear Mode Linear Mode



Posting Rules  
You may post new threads
You may post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are On
Refbacks are On

 
For the best viewing experience please update your browser to Google Chrome