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- Newsgroups: sci.electronics
- Path: sparky!uunet!haven.umd.edu!darwin.sura.net!spool.mu.edu!yale.edu!ira.uka.de!chx400!bernina!schaerer
- From: schaerer@isi.ethz.ch (Thomas Schaerer)
- Subject: Re: Toggle FF (Switch)
- Message-ID: <1992Dec15.074742.14105@bernina.ethz.ch>
- Sender: news@bernina.ethz.ch (USENET News System)
- Organization: Swiss Federal Institute of Technology (ETH), Zurich, CH
- X-Newsreader: TIN [version 1.1 PL8]
- References: <Dec.14.18.42.17.1992.18096@pilot.njin.net>
- Date: Tue, 15 Dec 1992 07:47:42 GMT
- Lines: 18
-
- Hubey (hubey@pilot.njin.net) wrote:
-
- : I need a toggle-flip-flop that works at 9V so that I can
- : use it in conjunction with a momentary-contact switch to
- : turn my alarm system on and off.
-
- Where is the problem? You must create a bounce-free-impulskey
- and control with it a follow D-flip-flop designed as toggle-ff by
- feedback of /Q-output to D-Input. Because the circuit has to work
- with 9 vdc, you must take cmos-components of the family CD4xxxx
- (NATIONAL SEMIC.) or MC14xxxx (MOTOROLA). For D-ff take the dual
- type-d -flip-flop MC1413B or CD14013B. To build a bouncefree impulse-
- circuit there are many ways with rs-flip-flop and a on-on-key or
- a monoflop with a on-off-key.
-
- More questions, send these to my e-mailbox.
-
- Bye Thomas
-