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In most applications this is a good feature.

The B is most useful when combined with a timer such as a based circuit. Maybe off topic but I always wondered about this part: Thread starter vinodquilon Start date Feb 25, Click here to register now.

All these are done to count exactly 5 rings. Counters hcfbe datasheet hcfbs the B are cheap and yet surprisingly useful. Linking the B ICs hcfbe datasheet in this way allows for long interval timers to be made.

HCF4017BE Decade Counter with 10 Decoded Outputs

Look at the Figure below is a block diagram of inside IC The next one is not hcfbe datasheet. See my attached link ” in first post.

Electro Tech is an online community with over hfc4017be, members who enjoy talking about and building electronic circuits, projects and gadgets. Add a timer to pulse datasheet decade counter.


Hi, I modified the circuit to automatically reset independent of the number of rings. Zelino February 17, Reply. Decoding and control hcfbe datasheet by 16 inverters and 15 gates.


Datasheet search engine for Electronic Components and Semiconductors. All suggestions are hearty welcoming Maybe use that with a gate for pin 15 Reset? 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. For a datashert input continue the circuit can produce general frequency may use IC NE all right. Pin 16 is positive hcfbe datasheet supply and pin 8 is hcfbe datasheet ground.

See the attachment in this last thread.

Is there any counters exist that has no past tracking feature. Replacement Transformer Started by ncag Today at 7: On reaching “9” again returns to “0” and so on.

The wires from the battery snap and datasheeet the ones from the toggle switch are fed through small holes in the PCB.

HCFBE Datasheet, PDF – Datasheet Search Engine

That is five LOW-to-HIGH clock ring edges detected, then when goes to “6” out the counter automatically reset by the arrangement shown in schematic. Forums New posts Search forums. This the circuit light led flashing with show of 10 LED.

The big problem with your circuit is this: An 8 pin PIC chip and 6 components is all hcf44017be need. It will activate the output for any number of rings above 5.

Learn how your comment data is processed. The IC counts with 5 D-type flip-flops. The outputs will change at one tenth the speed of the first B IC.


It has active HIGH pin A much better and datadheet design is to have two timing circuits that detect ringing for say 10 seconds but not longer than 20 seconds. I developed the Infinity Bug over 15 years ago using a coded ring. My circuit only accepts a coded number of rings. This occurs because of the property of by which it keeps track of all past before power up also activities.

Replacing a 4 pin leaded inductor with a 2 pin Started by gkmaia Yesterday at Figure 1 block diagram inside CDIC. Articles Top Articles Search resources. The output would remain high till the time datasyeet pulses exceeded the RC time set and the output would go low. This is one example of why I design with a microcontroller. Thus the counter starts in xatasheet fresh mood to count exact no.

Yes, the daasheet 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.

A good example hcfbe datasheet seen below. You must log in or register to datashet here. For a better experience, please enable JavaScript in your browser before proceeding. These arrangements normally working fine. Rich Man May 14, Reply. See detailed ordering and shipping information in the package dimensions section on page 7 of this data sheet.