Talk:78xx

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Misc[edit]

I removed the "virtually indestructable" line from the benefits section and replaced it "...quite robust...". The IC will die if it's exposing to voltage that greatly exceeds it's listed input. Since this IC is often the first componant that is exposed to excess voltage the ICs are frequently killed. This is especially true in poorly regulated voltage settings (such as automotive applications) or in poorly designed circuits.

The datasheets I've seen specify a capacitor on the output of the IC. The ICs work without the cap, but the cap helps reduce noise -especially in circuits with quickly changing loads or input voltages. The 'benefits' statement about lack of external componants doesn't reflect this.

LM7833[edit]

I would like to propose to list a small quirk of the numbering system. These regulators go up to 24V of output, but there exists an LM7833. This particular IC provides 3.3V of output. Just thought that it might be worthy of note.46.204.112.103 (talk) 23:35, 16 July 2011 (UTC)[reply]

LM340 versus LM78 series information ?[edit]

Is this solely an introduction of an alternate part number for an identical industry standard device, or is there some specific difference in the parts ?

24.199.143.230 (talk) 16:06, 15 November 2011 (UTC)[reply]

Copy-paste concerns[edit]

Thanks to the hidden note, I looked more carefully at the apparent copy-paste flagged to [1] than I might ordinarily have done. The content looks like it was added here, but in fact was in our article years ago...long before the instructables page was created. See, for instance, this version of our article from December 2008. I've left a comment at the source. --Moonriddengirl ^(talk) 21:16, 24 August 2013 (UTC)[reply]

History section?[edit]

A history of how the 78xx series was invented and by whom would be nice to have on this page. — Preceding unsigned comment added by 24.85.213.54 (talk) 09:15, 12 November 2015 (UTC)[reply]

Good question. I don't have the answer in front of me, but since it started with "LM", I assume it was first created at National Semiconductor back in the day. • Sbmeirow • Talk • 03:42, 16 November 2018 (UTC)[reply]

Add info about patents, are these still subjeect to licensing or is the design now public domain? — Preceding unsigned comment added by 104.173.197.143 (talk) 02:56, 16 November 2018 (UTC)[reply]

Good question. I assume the PATENT is over by now, but likely the original manufacturer still has a COPYRIGHT on it. • Sbmeirow • Talk • 03:42, 16 November 2018 (UTC)[reply]

Additional Advantage -- EMI[edit]

Under "Advantages," it does not mention that linear power supplies generate very little interference as compared to switching power supplies. I would think this is an advantage, particularly around sensitive analog circuits like RF. I'm not an engineer, but wouldn't this be appropriate to include? — Preceding unsigned comment added by Parkerea (talk • contribs) 21:44, 15 December 2015 (UTC)[reply]