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- Path: sparky!uunet!olivea!charnel!csusac!usenet
- From: chenh@neptune.ecs.csus.edu (H. Philip Chen)
- Newsgroups: sci.electronics
- Subject: Re: CD4514 4-16 decoder
- Message-ID: <1992Nov21.024740.19971@csusac.csus.edu>
- Date: 21 Nov 92 02:47:40 GMT
- References: <Bxzpr1.79x@news.cso.uiuc.edu>
- Sender: usenet@csusac.csus.edu (News account (alt))
- Organization: California State University, Sacramento
- Lines: 15
-
- rky57514@uxa.cso.uiuc.edu (Tall Cool One ) writes:
- : Does anyone know about the CD4515 4-bit latched/4-16 line decoder? I have one
- : connected to a 4-bit binary counter. The idea is a sequencer or chaser light.
- : Problem is that the LEDs light correctly sometimes, and other times, not at
- : all. I have the data sheets, and it doesn't tell me anything useful. I just
- : want to use th 4514 as a decoder. I really don't need the latch part of it..
- : Any suggestions would be greatly appreciated! Thanks!
-
- Well, I don't claim to know the CD4514/5 that well, but since you
- have the datasheets handy, check the max output current of each pin.
- (I suspect it's not high enough to drive each the LEDs and if so,
- you'll need to add some line drivers in there.) Good luck.
-
-
- -phil
-