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1  Forum 2005-2010 (read only) / Troubleshooting / Re: "usbserial" vanished from the Serial Port submenu on: January 11, 2009, 09:06:55 pm
Well, that 'splains that.

I have a larger issue then.  smiley-sad

Without any shield, the Arduino apparently no longer registers.  

Advice?
2  Forum 2005-2010 (read only) / Troubleshooting / Re: "usbserial" vanished from the Serial Port submenu on: January 11, 2009, 08:53:27 pm
Really?  And that removed those /dev files from the host OS?  Is the software just sort of "giving up"?

ANd, yeah, i was working on a protoshield, but even before I plug back in the USB, there is no /dev/usb* whatever.

Hmf.

I'm brewing tomorrow, and hoped I could finish this dumb bubble counter before then.  Beer comes first, though.  smiley
3  Forum 2005-2010 (read only) / Troubleshooting / "usbserial" vanished from the Serial Port submenu on: January 11, 2009, 06:13:47 pm
I've been using the Arduino Duemilanove pretty solidly for about a day and a half now, and am nearing the end of my particular experiment, when suddenly, Arduino (the programming environ) locked up, and after force quitting, rebooting, re-installing the latest usbserial drivers i could find (2.2.10), I still only have bluetooth drivers in the serial menu.

What happened?  Is there a log I can look at?  Some sort of weird reset scenario?

I'm on a Macbook Pro with Leopard.

The USB ports are still functional, according to the iPhone.

4  Forum 2005-2010 (read only) / Frequently-Asked Questions / Arduino + Vacuum Tubes as a transistor on: October 19, 2009, 05:52:30 pm
Good day!

I've recently finished a "Mad Scientists Lamp" (http://www.instructables.com/id/Mad-Scientists-Light/) that uses 3 25W incandescents and an off-the-shelf dimmer.  Yep, it's pretty cool, but I have that dimmer turned way, way down, so it's only putting out about the same amount of light as a candle (<2VAC).

What I want to do now is introduce some random flickering, and was going to do so with an arduino and some clever programming, such as adjusting the duty cycle of a digital out to control the brightness.

1.  I can't seem to work out why 10VDC barely lights the light, yet 2VAC (so says my fluke) lights it much brighter. Even if RMS is taken into account, I can't figure it out why 10VDC is so dim.

2. Obviously, I can't drive 3 lights with the arduino, so I was going to use a transistor driven by a digital out to "blink" the 120VAC to control brightness.  It's been, perhaps 10 years since I've messed with transistors, but it IS possible to choose a high-power transistor, and drive it with the output of the arduino, yeah?

3.  Being all retro-looking in the first place, why not use a vacuum tube instead of a transistor, for the same effect. But, since arduino is digital, the vacuum tube would be acting like a relay, which has limited life.  Should I perhaps look into preamp tubes, like they use in guitar amps?  I've got no vacuum tube experience, i just think it'd be neat.

The bulbs in question are 25W tall bulbs they sell at home depot.
5  Forum 2005-2010 (read only) / Frequently-Asked Questions / Arduino + Vacuum Tubes as a transistor on: October 19, 2009, 05:51:39 pm
Good day!

I've recently finished a "Mad Scientists Lamp" (http://www.instructables.com/id/Mad-Scientists-Light/) that uses 3 25W incandescents and an off-the-shelf dimmer.  Yep, it's pretty cool, but I have that dimmer turned way, way down, so it's only putting out about the same amount of light as a candle (<2VAC).

What I want to do now is introduce some random flickering, and was going to do so with an arduino and some clever programming, such as adjusting the duty cycle of a digital out to control the brightness.

1.  I can't seem to work out why 10VDC barely lights the light, yet 2VAC (so says my fluke) lights it much brighter. Even if RMS is taken into account, I can't figure it out why 10VDC is so dim.

2. Obviously, I can't drive 3 lights with the arduino, so I was going to use a transistor driven by a digital out to "blink" the 120VAC to control brightness.  It's been, perhaps 10 years since I've messed with transistors, but it IS possible to choose a high-power transistor, and drive it with the output of the arduino, yeah?

3.  Being all retro-looking in the first place, why not use a vacuum tube instead of a transistor, for the same effect. But, since arduino is digital, the vacuum tube would be acting like a relay, which has limited life.  Should I perhaps look into preamp tubes, like they use in guitar amps?  I've got no vacuum tube experience, i just think it'd be neat.

The bulbs in question are 25W tall bulbs they sell at home depot.
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