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106  Forum 2005-2010 (read only) / Interfacing / Re: El Escudo Shield Using 5volt inverter on: July 17, 2010, 11:11:08 am
Hi thanks for getting back

The inverter has no information whatsoever unfortunately...

Does it mean anything that the wire works fine when connected straight to the inverter?

Where would I add the cap(s). Also I do have an assortment but I don't know how to calculate the right value.

fubbi
107  Forum 2005-2010 (read only) / Interfacing / Re: El Escudo Shield Using 5volt inverter on: July 17, 2010, 10:40:35 am
Hello, its very simple really, that is why it confuses me. Should just work...

thank you


108  Forum 2005-2010 (read only) / Interfacing / Re: El Escudo Shield Using 5volt inverter on: July 17, 2010, 07:08:49 am
I cant get it to work either. I am using a 9v inverter and I am powering the arduino with 9v/1A.

I connected the "raw voltage" to the DC in, and the "inverter output" to the AC out, on the inverter. The wire lights up but its very shaky, and it does not obey the program, I tried blinking and fading. The inverter squeals (supposedly normal) and the wire flickers chaotically.

I know the wire and the inverter are fine, if I connect 9v direct to the inverter the wire lights up fine. Something is wrong with the way I connect the escudo.

Did you get it to work?

fubbi
109  Forum 2005-2010 (read only) / Interfacing / Re: need a MQ-3 alcohol sensor in germany on: July 07, 2010, 08:41:09 am
thank you, unfortunately I don't have time for shipping from the US, it might get stuck in customs and ruin my plans.

fubbi
110  Forum 2005-2010 (read only) / Interfacing / need a MQ-3 alcohol sensor in germany on: July 02, 2010, 03:13:33 am
Does anyone know a place in germany where I can order a couple of alcohol sensors. I can only find them in packages of 100 so far.

either the MQ-3
http://www.parallax.com/StoreSearchResults/tabid/768/txtSearch/mq-3/List/0/SortField/4/ProductID/669/Default.aspx

or the TGS 2620
http://www.directindustry.de/prod/figaro-engineering/halbleiter-alkoholdampfsensor-29357-147468.html

or actually, anything will do at this point!

thankfully

fubbi
111  Forum 2005-2010 (read only) / Interfacing / Re: overpowering a LED on: July 02, 2010, 08:58:39 am
Hi

It's just a normal LED, not a high power one. I am confused now.

My resistor was based on 5V source voltage, 3.6V diode voltage, 30mA forward current

(5 - 3.6) / ( 30 / 1000 ) = 46.6 ohms

Wrong?? I dont want to kill my arduino!

http://www.produktinfo.conrad.com/datenblaetter/175000-199999/181154-da-01-en-LED_KLAR_10MM_WEISS_LED_10_80_000W.pdf
112  Forum 2005-2010 (read only) / Interfacing / Re: overpowering a LED on: July 02, 2010, 08:06:13 am
lol! what?
113  Forum 2005-2010 (read only) / Interfacing / overpowering a LED on: July 02, 2010, 06:52:30 am
hi

I want to create a bright flash. I have a 80.000 mcd 10mm LED, and I really want to get the most out of it. The correct setup is a 47[ch937] R with the 5v from the arduino, but I would like to get the most out of it. Since it's just a 5ms on / 500ms off cycle I am hoping I can allow myself to "stress" the LED and get some more brightness.

Any ideas?

thanks

fubbi

114  Forum 2005-2010 (read only) / Interfacing / Re: molex? on: June 29, 2010, 10:10:07 am
Got it, thank you very much!

fubbi
115  Forum 2005-2010 (read only) / Interfacing / molex? on: June 29, 2010, 09:51:22 am

hi, I am trying to figure out what the connectors on this board are called in europe

http://www.sparkfun.com/commerce/product_info.php?products_id=9259

I am hoping I don't have to order them from the US

help much appreciated

thanks

fub
116  Forum 2005-2010 (read only) / Interfacing / Re: Dimming AC lights on: June 25, 2009, 12:21:11 pm
most excellent sir

thank you

fubbi
117  Forum 2005-2010 (read only) / Interfacing / Re: Dimming AC lights on: June 25, 2009, 08:38:48 am
Hi Mike

I get what you mean, but not what it means...

The SK3 has "+" and "-" connectors, "-" is not ground?

thanks

fubbi
118  Forum 2005-2010 (read only) / Interfacing / Re: Dimming AC lights on: June 25, 2009, 07:49:52 am
SK3?
119  Forum 2005-2010 (read only) / Interfacing / Re: Dimming AC lights on: June 25, 2009, 05:50:20 am
I have built the circuit exactly like in brakmolotov's example.

I can see the value going up and down between 0v and 5v nicely on pin 9 when I run his code.

But I am not getting past the transistor. When I measure at the output to the velleman I see a constant 6v

Any clues as to why this might be? Have I got something the wrong way around?

Thanks

here's the schematic

120  Forum 2005-2010 (read only) / Interfacing / Re: Resistors & common anode 7-segment leds on: April 22, 2010, 08:44:02 am
of course! thanks!
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