#46
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Woah. That's just a lil bit above my level. Playing around with 120-180 volts.. hmmm.. Don't think I have anything up to that level yet. All I got for tinkering is a 12v DC transformer and a teeny variable 1.5-12v AC-DC.. I play around with automotive and some computer electronics which almost never goes over 12v.. Really interesting though. Mayhaps that dead VCR in the corner has some use later on..
Anyway, to the VFD at hand. Today after riding and parking in the dark, I noticed that the wires are indeed getting some current. They were faintly glowing.. Which means you guys were right, the VFD isn't dead. Something else is. Now just need to figure out what.. Gonna have to dismantle it again over the weekend or when I gots some free time.. Well, at least I know the re-soldered broken trace did do *something* p/s: the attached isn't actually my tube but it's doing the same thing |
#47
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A voltmeter can tell you what's going on there. Besides the filament voltage, most VFD take 35-40V to light up. If it is installed in equipment, the anode or grid segments may be 'scanned' with a voltage from the display driver IC, each one in turn being high or low, to light up the desired segments. Don't be surprised if the filament is at a negative DC potential and the anodes near GND. A scope can show you what is being pulsed or scanned.
About the higher voltages, at some time, if you work with them, it can only make you a better tech and wiser collector.
__________________
Timeless Information for Retro-Tech Hobbyists and Hardware Hackers No Kowtow
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#48
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Thanks for the tip Opcom. Looks like I've got a good deal to learn about VFDs. Really interesting tech these.. We'll see soon how I get on..
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#49
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i have the VFD module from a wrecked Pioneer CT-F600 cassette deck, i'd like to use it as a VUmeter in a small portable PA amp i'm building, would it be possible to use this module with the 12 volts supply available in the amp?
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#50
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Yes, you should be able to. However, I dont know if it requires DC rectification and time constant beforehand. I think it does. But you still need to supply a proper filament voltage. Usually 5V with a dropping resistor will suffice, but even brightness will be a factor.
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Audiokarma |
#51
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Quote:
Last edited by Visual; 06-26-2013 at 08:44 AM. |
#52
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http://audioidiots.com/Sony/brochure...oot/p005i1.jpghttp://audioidiots.com/afbeelding.groot.php?itemID=6451http://audioidiots.com/afbeelding.groot.php?itemID=3752http://audioidiots.com/Sony/diversen...3-22-07-08.jpghttp://audioidiots.com/Sony/diversen...6-20-37-18.jpghttp://audioidiots.com/afbeelding.groot.php?itemID=6421http://audioidiots.com/afbeelding.groot.php?itemID=6686
Last edited by Visual; 07-10-2013 at 10:55 AM. |
#53
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oooooo purtyfull.
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#54
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Quote:
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#55
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Audiokarma |
#56
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I have been at it again.
These Futaba displays are actually on ebay right now for a mere $2.50 a piece. So i got a few and built a circuit. |
#57
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Another thing I want to note, is Noritake now has a shopping e-commerce site setup for sales and Also, they offer free samples on a couple of their products.
They have a few selections for cheap discount prices if your into development for microcontrollers, or arduino, etc.. They offer the C libraries for their 7000 series for arduino. They are also running a special for 50% off on their modules. This is by no means an advertisement or sales promotion, Its just something I found awesome that they are doing. Thats all. |
#59
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i DONT know were COME from your is, mbates14 but here some USA locations of FUTABA http://goo.gl/maps/uRzcb
http://www.futaba.com/corporate/locations/index.asp GOOD TRIP |
#60
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Speaking of fluke and futaba, I need to find a replacement VFD for my fluke 45 benchtop. They are long since discontinued.
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Audiokarma |
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