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16  Using Arduino / General Electronics / Re: Solder does not stick to iron after cleaning on: August 05, 2013, 11:57:09 am
The iron the OP has I'm sure it's the same as I posted It's a very well made but like the OP has found out it gets to dam hot to fast.

I've used a lot of irons in the last 40 years there all been usable some better then the rest but still usable big stuff big iron.
But the one were talking about is able to over heat way to fast and make the tip hard to clean. But like any thing if you learn your tools they become usable.

I slapped a dimmer on mine and its ten times better then any I've used  over the years I think they under rated it it's hotter then a 40 watt I use on grounds. And it can handle the same jobs easy.

I first got mine just because it was on sale for half price and had a nice case for my tool box on the truck. It solder two 12 gauge wires like butter till it sat in the holder then you had to clean it with tip cleaner.  I pull out a work box and a outlet and dimmer from my part box and made a cheap controller for it after a hour and two kinds of solder I tamed her down. It's better then a weller at work that cost over $400 and I have $24 in it. 
17  Using Arduino / General Electronics / Re: Solder does not stick to iron after cleaning on: August 04, 2013, 10:16:46 pm
I'd say you have one of these it's a great iron put a $5.00 dollar dimmer on it and you'll Love it.
18  Using Arduino / General Electronics / Re: Solder does not stick to iron after cleaning on: August 04, 2013, 09:54:44 pm
It's a dimmer http://www.lutron.com/en-US/Products/Pages/StandAloneControls/Dimmers-Switches/RotaryDimmer/Overview.aspx
http://digital.turn-page.com/t/23303/119 1500 watt triac dimmer
Here the Lowes page http://www.lowes.com/pd_211632-539-D-600PH-DK_0__?productId=1059607&Ntt=dimmers

You'd wire it up close to that
19  Using Arduino / General Electronics / Re: Solder does not stick to iron after cleaning on: August 04, 2013, 09:46:28 pm
It's not going to be that bad on you just use only when needed and use a fan to suck the fumes away. you'll be a ok then.
20  Using Arduino / General Electronics / Re: Solder does not stick to iron after cleaning on: August 04, 2013, 09:39:51 pm
Quote
When the tip is hot, plunge it into the compound, kind of rotate it in there, remove it, wipe it off.

That works but I'm sure the op has the same iron I have and it get's hot fast and he'll be dipping more then soldering if he dont turn the heat down when not soldering.
21  Using Arduino / General Electronics / Re: Solder does not stick to iron after cleaning on: August 04, 2013, 09:23:16 pm
Yep
Quote
hard corrosion to build up

It's not the solder the iron you have is a great iron it just gets to hot and corrodes the tip when setting I use tip cleaner on mine radio shack sales it for $9:00. But thats a lot of work so I got a dimmer from Lowes and made a box with dimmer and outlet in it.
Set that for about half heat till I need the iron and now she is great tip stays clean and if I need all that heat I still have it.

Spent about a hour playing with the dimmer to make setting I can set and just use the iron.
22  Using Arduino / General Electronics / Re: HOt air gun? on: August 04, 2013, 10:18:22 am
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How do I desolder a component, a small component with a hot air gun? WIthout breaking it?
Looks like he wants to keep it ..
23  Community / Bar Sport / Re: Myth - ALL LED'S require Resistors or.... on: July 29, 2013, 06:30:00 pm
I was testing some leds with a variable voltage supply I had 12 leds in series I turned the supply up till they all came on.
Looked great I turned off the supply. I then came back to see how much I could go I turn on the supply and a big bang I now have a scar from
one of the leds. I must hit the pot on the supply..

I gave up on the voltage idea for leds and went with current controlled supply.  
24  Using Arduino / General Electronics / Re: [SOLVED] 16 Channel 12 volt relayboard and Arduino UNO on: May 09, 2013, 08:38:18 pm
Lol no one looked at the PDF if you cut the ground from the uno the relays are still hooked to the supply ground and if you turn on one closing the power loop. But the OP should rethink this and read the data sheet the relays are setup to use 20 mA to turn on, and Like I said you don't need a resistor from the uno to turn these on with five volts but your using a resistor and 12 volts that sets it to about 21mA.

That's why it works now but it's not a good idea you forget the 4.7 good by port pin.

So if you left off the resistor and just use 5 volts it should work too and no worries off blowing a port pin.
25  Using Arduino / General Electronics / Re: 16 Channel 12 volt relayboard and Arduino UNO on: May 08, 2013, 09:05:53 pm
The way it shows in the pdf you hook the pin from the uC to ground the led of the Optocoupler
it has a built in resistor to limit it to 20 mA.

You didn't add one did you? 
26  Using Arduino / General Electronics / Re: 16 Channel 12 volt relayboard and Arduino UNO on: May 08, 2013, 07:47:38 pm
Well if you did what you show in the pic you probably killed your uno you are sinking 12 volts..  
http://elecfreaks.com/store/download/16_Relay.pdf
27  Using Arduino / General Electronics / Re: 74HC595 used for shift input not output! on: May 01, 2013, 04:53:52 pm
He is pulling the latch to ground. It's in the datasheet outputs active when E pin is low so you tie it low and just use the data and the clock
 
28  Using Arduino / General Electronics / Re: 74HC595 used for shift input not output! on: April 30, 2013, 09:54:47 pm
Its easy he is reading a keypad where you set just one columns high and scan the rows for a press.
Or set one row high and scan the columns which ever way you want to do it.
But he is not reading it as a input.
29  Using Arduino / General Electronics / Re: 1.8v to 5v logic level converter on: April 15, 2013, 07:54:27 pm
Try one of these http://www.ftdichip.com/Products/Cables/USBTTLSerial.htm
This one TTL-232RG-VREG1V8-WE
30  Using Arduino / Project Guidance / Re: two pwm channels, for 5-12v and 0-100mA output on: April 13, 2013, 05:08:50 pm
Quote
Am I on the right track with the lm334z/nopb?
Nope that's  Voltage Reference
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