Forum: General Electronics Technical Discussion
11-29-2015, 10:16 PM
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Replies: 146
Views: 11,877
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Forum: General Electronics Technical Discussion
11-29-2015, 01:39 AM
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Replies: 146
Views: 11,877
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Forum: General Electronics Technical Discussion
11-29-2015, 12:17 AM
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Replies: 146
Views: 11,877
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Forum: General Electronics Technical Discussion
11-29-2015, 12:17 AM
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Replies: 146
Views: 11,877
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Forum: General Electronics Technical Discussion
11-28-2015, 06:58 PM
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Replies: 146
Views: 11,877
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Forum: General Electronics Technical Discussion
11-28-2015, 06:11 PM
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Replies: 146
Views: 11,877
Re: Need help reading a schematic.
your cutters are making that look, get a pair with a flush-blade on the outer edge.
factory's used to use a saw to trim all the leads years ago,
now the leads are pre-cut before they are...
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Forum: General Electronics Technical Discussion
11-28-2015, 03:05 PM
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Replies: 146
Views: 11,877
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Forum: General Electronics Technical Discussion
11-27-2015, 04:00 PM
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Replies: 146
Views: 11,877
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Forum: General Electronics Technical Discussion
11-27-2015, 02:01 PM
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Replies: 146
Views: 11,877
Re: Need help reading a schematic.
you dont need flux to desolder with hot air if you can see the pins.
BGA is a completely different situation, your using the flux to transfer the heat under the package.
using a nitrogen gas-flow...
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Forum: General Electronics Technical Discussion
11-27-2015, 11:30 AM
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Replies: 146
Views: 11,877
Re: Need help reading a schematic.
why would you need flux to remove something???
say i want to remove a 144pin chip - because i do them by hand.
(yes, i do!)
i heat the chip with the handheld air unit, till it lifts off the...
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Forum: General Electronics Technical Discussion
11-26-2015, 09:44 PM
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Replies: 146
Views: 11,877
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Forum: General Electronics Technical Discussion
11-26-2015, 09:31 PM
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Replies: 146
Views: 11,877
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Forum: General Electronics Technical Discussion
11-25-2015, 06:12 PM
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Replies: 146
Views: 11,877
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Forum: General Electronics Technical Discussion
11-25-2015, 05:39 PM
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Replies: 146
Views: 11,877
Re: Need help reading a schematic.
if the seller actually has a datasheet, i would insist on the voltage, current and disipation numbers.
he obviously wants to hide the mfr/supplier name.
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Forum: General Electronics Technical Discussion
11-25-2015, 02:20 PM
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Replies: 146
Views: 11,877
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Forum: General Electronics Technical Discussion
11-25-2015, 12:54 PM
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Replies: 146
Views: 11,877
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Forum: General Electronics Technical Discussion
11-24-2015, 08:21 PM
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Replies: 146
Views: 11,877
Re: Need help reading a schematic.
HD44780 is the interface, originally it was the part number of the chip but they are cloned to hell now.
BC1602A is the display that is using the chip - part number suggests 16characters by 2...
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Forum: General Electronics Technical Discussion
11-24-2015, 05:45 PM
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Replies: 146
Views: 11,877
Re: Need help reading a schematic.
R2 would depend on the display, modern displays can use a single high-eficiency led with a good light-pipe,
older ones could use anything from 2 to 10 or more - specially if they are actually "back"...
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Forum: General Electronics Technical Discussion
11-23-2015, 03:35 PM
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Replies: 146
Views: 11,877
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Forum: General Electronics Technical Discussion
11-21-2015, 03:15 PM
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Replies: 146
Views: 11,877
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Forum: General Electronics Technical Discussion
11-20-2015, 09:30 PM
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Replies: 146
Views: 11,877
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Forum: General Electronics Technical Discussion
11-20-2015, 05:54 PM
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Replies: 146
Views: 11,877
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Forum: General Electronics Technical Discussion
11-20-2015, 03:38 PM
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Replies: 146
Views: 11,877
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Forum: General Electronics Technical Discussion
11-19-2015, 10:01 PM
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Replies: 146
Views: 11,877
Re: Need help reading a schematic.
it's not screws.
the grabber uses an electromagnet, the control system regulates win's by varying the current to the magnet.
early systems just had a "power" control.
newer ones monitor wins...
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Forum: General Electronics Technical Discussion
11-19-2015, 07:11 PM
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Replies: 146
Views: 11,877
Re: Need help reading a schematic.
everything in fairgrounds is "regulated" in one way or another.
if you think that's bad, you should see how the cranes work!!!
i'll give you a hint - they are intelligent and can regulate the...
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