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Old 01-06-2008, 09:40 PM #1
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Default Some good info

Someone gave me an old style TV Tuner, before pitching I figured there would be some goodies in here, and right I was. I recommend harvesting caps and resistors and diodes if you can find any, it will save you some money later. Look at all the goodies I harvested! ;D
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Old 01-06-2008, 09:42 PM #2
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Default Re: Some good info

.
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Old 01-06-2008, 09:43 PM #3
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Default Re: Some good info

.
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Old 01-06-2008, 09:43 PM #4
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Default Re: Some good info

.
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Old 01-06-2008, 09:53 PM #5
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Default Re: Some good info

In the electronics hobby, we call that starting a "junk box". That's a good term ;D I have tons of "junk" which come in handy all the time.
The 7812 and 7805 are 12 volt and 5 volt regulators.

Good Start !

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Old 01-06-2008, 10:15 PM #6
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Default Re: Some good info

How do you take the caps off, when i pull them the leads always just come out.

I need to take all the voltage regulators out of a ups (uninteruptable power supply), its like for a computer so you can use it when the power goes out, i would guess it has around 25 of them in there, plus some ones that are like 1inch square, those are biggg regulators.

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Old 01-06-2008, 10:23 PM #7
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Default Re: Some good info

I used a little RadioShack mini butane soldering iron and tapped the solder points on the board with the tip while pulling slowly, adding heat only as needed, then it would eventually come out once you gradually add heat and pull. ;D
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Old 01-06-2008, 10:23 PM #8
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Default Re: Some good info

Wweeelll -- I unsolder them to remove from the board. Sometimes a solder sucker helps. Yes, That's a real tool.
All that "stuff" in the uninteruptable power supply may not be regulators. There's probably transistors and BIG MosFet's in there. You have to research the part numbers.

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Old 01-06-2008, 10:28 PM #9
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Default Re: Some good info

Duh... i cant belive i didnt think of that, just melt the solder and take em out... its always the simple things i never seem to think of..

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Old 01-07-2008, 12:57 AM #10
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Default Re: Some good info

I did some searching and found an old canon printer external power supply.

I got a bevy of useful components out of this.

120uf 400v capacitor
(2) 330uf 25v capacitor
47uf 35v capacitor
47uf 16v capacitor
100uf 10v capacitor
10uf 50v capacitor
1 uf 50 v capacitor
(2) potentiometers
LM317T
(3) switches
(14) 10ohm 1/4 watt resistors
(5) silicone diodes
Green LED
Red LED
(2) White LED
(3) Unknown item A
(8) Unknown item B
Unknown item C

WOW I NEED TO HOLD THE CAMERA STEADY!









Here is the 400v capacitor!



I cannot figure out what these are. Any ideas?



Dont quite know what these are either. Anyone know?



Can't figure this one out either. Cinda looks like a capacitor but has no markings on it.



I will take apart the printer soon and see what I can find in there!
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Old 01-07-2008, 01:04 AM #11
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Default Re: Some good info

the first ones are transistors, the second ones are capacitors, they are a different type, can handle high voltage but dont hold much at all.

And i dont know what the third is.

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Old 01-07-2008, 01:07 AM #12
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Default Re: Some good info

Quote:
Originally Posted by wooooooolazer
the first ones are transistors, the second ones are capacitors, they are a different type, can handle high voltage but dont hold much at all.

And i dont know what the third is.

...lazer... ;D ;D ;D
Thanks! What exactly do transistors do?
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Old 01-07-2008, 01:57 AM #13
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Default Re: Some good info

here comes google.... http://amasci.com/amateur/transis.html

I dont really know what they do in detail, i think it has something to do with amplyfing things, like in guitar amps, may be way off here didnt realy want to read all that.

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Old 01-07-2008, 03:03 AM #14
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Default Re: Some good info

wow. um. you removed all those parts from that board just by pulling, without heat??? i'm surprised that many survived. my usual technique is with a soldering iron too. for parts with a lot of legs i heat as many joints as possible at once, while rocking it back and forth to lift the melted joints a fraction at a time, then melting the other ones, wiggle, melt, wiggle, melt, etc.
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Old 01-07-2008, 03:11 AM #15
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Default Re: Some good info

btw a transistor is a solid state switching device that has a base, collector and emitter. don't know more than that, i'm good with electronics but never 'got' transistors.
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Old 01-07-2008, 04:38 AM #16
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Default Re: Some good info

Quote:
Originally Posted by spinout059
(...)
Thanks! What exactly do transistors do?
<slaps forehead>

Transistors, like laser diodes, are another device based on the p/n junction. Transistors are the building block of all fundamental logic circuits (AND, OR, NOT, XOR, etc.) and these circuits are in turn the building blocks of the microprocessors that make computers and this news group possible. Computers/processors are essentially comprised of huge numbers of transistors.


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