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Let us assume he disconnect his phone on 2nd ring. Yes, the in the design is set to count to N and recycle so it waits till it gets to N regardless of where the pulses clock is from. Look up the datasheeet data sheet.

The big problem with your circuit is this: A good example hcfbe datasheet seen below.

In most applications this is a good feature. Q1 through Q4 are ORed with diodes. Is there any counters exist that has no past tracking feature. It has 16 pins and looks like any other 16 pin integrated circuit. By continuing to use this site, you are consenting to our use of cookies. This really neat chip contains a counter and a decoder circuit, that can show a single output pin for each count from 0 to 9.

The monostable is initiated by the first positive clock edge at pin 14 CLK.

Boncuk, if i have not understand wrongly, the 4 doides connected from 2nd to 5th out puts are not important, since as he said if the ring discontinues in between, then on of the input would be high and you will never get a reset output. This is one example of why I design with a microcontroller. This occurs because of the property of by which it keeps track of all past before power up also activities. Boncuk New Member Feb 25, But what happened when someone wouldn’t complete 5 rings missed call?


Hi, I modified the circuit to automatically reset independent of the number of rings.

The outputs will change at one tenth the speed of the first B IC. Pioneer Elite vsxtx water damage no power Started by Watin 48 minutes ago Replies: A astable circuit is used to pulse the B at regular intervals.

A number of B IC circuits can be connected together by connecting pin 10 divide by 10 pin to the input on dwtasheet next Ucfbe IC. Add a timer dqtasheet pulse datasheet decade counter.

Replacing a 4 pin leaded inductor with a 2 pin Started by gkmaia Yesterday at They are versatile and relatively simple to put together. An 8 pin PIC chip and 6 components is all you need.

The pulse hcfbe datasheet the IC is generated from pin 3.

HCFBE Datasheet, PDF – Datasheet Search Engine

To participate you need to register. The IC counts with 5 D-type flip-flops. It has active HIGH pin I developed the Infinity Bug over 15 years ago using a coded ring. See my attached link ” in first post. Zelino February 17, Reply. Linking the B ICs hcfbe datasheet in this way allows for long interval timers to be made. All these are done datzsheet count exactly 5 rings.


HCFBE datasheet & applicatoin notes – Datasheet Archive

Thus the counter starts in a fresh mood to count exact no. The receiving phone can pick up the end of half a ring and this will not be detected by the caller, but the circuit will see it as a full ring.

All suggestions are very valuable.

See the attachment in this last thread. Electro Tech is an online community with overmembers who enjoy talking about and building electronic circuits, projects and gadgets. HCFBE I have suffered one displeasing feature most times useful of this counter, When the clock advances, decade counting also advances from 0 to 9 then 0 to 9 and so on. For a better experience, please enable JavaScript in your browser before proceeding. But the problem is that when we power up the circuit again, the counter starts from out “9” not from initial “0” when detecting first LOW-to-HIGH clock edge.

HCF4017BE Decade Counter with 10 Decoded Outputs

That is before completing 5 rings he deliberately cut his phone. But in practice we can neglect it as not affecting our project aim in any way. Articles Top Articles Search resources. Forums New posts Search forums. Your circuit is quite useless.