74LS datasheet, 74LS pdf, 74LS data sheet, datasheet, data sheet, pdf, Fairchild Semiconductor, Synchronous 4-Bit Binary Counters. These synchronous, presettable counters feature an inter- nal carry look-ahead for application in high-speed counting designs. The DM74LSA and. DMDMDM Synchronous These synchronous presettable counters feature an inter- Office Distributors for availability and specifications.

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N 4-bit counter not counting properly – Electrical Engineering Stack Exchange

Since countrr already need one section of aand there are 6 gates per IC, you simply go simulate this circuit. By clicking “Post Your Answer”, you acknowledge that you have read our updated terms of serviceprivacy policy and cookie policyand that your continued use of the website cohnter subject to these policies.

So your outputs should be connected like simulate this circuit — Schematic created using CircuitLab You may object that this will provide LEDs which are on when the output is low, and off when the outputs are high, which is confusing.

For a circuit board with a wheet plane, the usual guideline is at least one cap per 5 ICs. TTL works much better pulling loads down. Home Questions Tags Users Unanswered. By using our site, you acknowledge that you have read and understand our Cookie PolicyPrivacy Policyand our Terms of Service.

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That’s probably causing as much trouble as no debounce was.

(PDF) 74161 Datasheet download

WhatRoughBeast 49k 2 28 Post as a guest Name. You may object that this will provide LEDs which are on when the output is low, and off when the outputs are high, which is confusing.

Oh, Ill change that and see what happens.

For breadboards, use a cap for each IC. Without this buffering, your switch should not work on a button push, only on a release.

Email Required, but never shown. I have added a debounce circuit, but still to avail. Whenever I press the clock button I get all of coounter leds on except maybe one or two, with some flashing during the button press. I’d reduce that down to something in the nF to 1uF range.

Then I used a pullup resistor for the clear switch.

Fairchild Semiconductor

In that case, invert the signals going to your LEDs. I added a 0. So your outputs should be connected like.

You can often get away with less, but as you’ve just learned, insufficient decoupling can have weird symptoms. It’s always the simple things.

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Datasheet(PDF) – TI store

Sign up using Email and Password. Get into the habit now. Also, have you added a 0.

I’m still getting the same effect. Post Your Answer Discard By clicking “Post Your Answer”, you acknowledge that you have read our updated terms of serviceprivacy policy and cookie policyand that your continued use of the website is subject to these policies. As further issues arise I see myself stuck once more with shedt dysfunctional circuit.

I switched the LEDs around and connected their input to 5V sheef their ground to the output pins. Okay I wired 7,9, and 10 together and then connected them to a 1K resistor to 5V. Sign up using Facebook. Since you already rata one section of aand there are 6 gates per IC, you simply go. Sign up or log in Sign up using Google. Finally, you should not count on TTL outputs driving high, as you have shown.