Timing Circuit
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From: Spehro Pefhany on 29 Jan 2006 19:17 On 29 Jan 2006 12:30:58 -0800, the renowned "Jimbo" <James.Wyninegar(a)gmail.com> wrote: >Thanks for the info. As far as accuracy, I'm looking for something >that will work with a +/- 30 seconds or so. I'm assuming that any >change in performance based upon manufacturer and/or temperature >fluctations will not be a worry. Also, I don't really care as to the >number of bits the chip has for an output. I'm thinking I'll just run >the desired outputs through an AND that sets a S-R flip/flop. I'm sure >there is a better way of doing this and once I start with the design >maybe I'll come across some features that can help me cut down the need >for extra circuirty. Perhaps that's what the mc14541 does. Doing this >stuff in actual practice is quite a bit different than what I did for >school. It seems that there are so many permutations of doing the same >thing it's dizzing. It seems almost impossible to find the absolute >cost effective and most efficent way of doing something. Too many >options and not enough time. > >THANKS FOR YOUR HELP! >Jimbo Check out the 4536 as well. But a single 8-pin microcontroller can give you the required accuracy with no external parts, or 10x better with one external part. You would have to program it. Best regards, Spehro Pefhany -- "it's the network..." "The Journey is the reward" speff(a)interlog.com Info for manufacturers: http://www.trexon.com Embedded software/hardware/analog Info for designers: http://www.speff.com
From: Pooh Bear on 29 Jan 2006 19:31 Jimbo wrote: > Win, > > Is there a "system" for the naming of the IC out there? I keep reading > things that tend to "hint" that there is a systematic way of naming > these things. Isn't the formation usually "LETTERS" + "NUMBER" + > "LETTERS". Have any idea as to the method these things are named? There is next to no sense at all in it. The first few numbers/letters may tell you something but not a lot. Graham
From: PN2222A on 29 Jan 2006 22:08 "Jimbo" <James.Wyninegar(a)gmail.com> wrote in message news:1138570597.321014.296350(a)z14g2000cwz.googlegroups.com... > Is there a "system" for the naming of the IC out there? I keep reading > things that tend to "hint" that there is a systematic way of naming > these things. Isn't the formation usually "LETTERS" + "NUMBER" + > "LETTERS". Have any idea as to the method these things are named? > The first 1 or 2 digits is usually the heater voltage. Regards PN2222A
From: PN2222A on 29 Jan 2006 22:08 "Jimbo" <James.Wyninegar(a)gmail.com> wrote in message news:1138570597.321014.296350(a)z14g2000cwz.googlegroups.com... > Is there a "system" for the naming of the IC out there? I keep reading > things that tend to "hint" that there is a systematic way of naming > these things. Isn't the formation usually "LETTERS" + "NUMBER" + > "LETTERS". Have any idea as to the method these things are named? > The first 1 or 2 digits is usually the heater voltage. Regards PN2222A
From: Alan on 29 Jan 2006 22:57
On Mon, 30 Jan 2006 03:08:13 GMT, "PN2222A" <bipolar(a)lithium.net> wrote: > >"Jimbo" <James.Wyninegar(a)gmail.com> wrote in message >news:1138570597.321014.296350(a)z14g2000cwz.googlegroups.com... >> Is there a "system" for the naming of the IC out there? I keep reading >> things that tend to "hint" that there is a systematic way of naming >> these things. Isn't the formation usually "LETTERS" + "NUMBER" + >> "LETTERS". Have any idea as to the method these things are named? >> > >The first 1 or 2 digits is usually the heater voltage. > >Regards >PN2222A > so you have a 300mA heater?? -- Sell your surplus electronic components at http://ozcomponents.com Search or browse for that IC, capacitor, crystal or other component you need. |