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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In that case, invert the signals going to your LEDs. I’m still getting the same effect. Okay I wired 7,9, and 10 together and then connected them to a 1K resistor to 5V.

(PDF) 74161 Datasheet download

Finally, you should not couhter on TTL outputs driving high, as you have shown. I switched the LEDs around and connected their input to 5V and their ground to the output pins. It’s always the simple things. Get into the habit now. Then I used a pullup resistor for the clear switch.

Post as a guest Name. Since you already need one section of aand there are 6 gates per IC, you simply go.

Fairchild Semiconductor

Sign up using Facebook. Whenever I press the clock button I get all of the leds on except maybe one or two, with some flashing during the button press. Oh, Ill change that and see what happens. Sign up or log in Sign up using Google. So your outputs should be connected like. 741611, have you added a 0. 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, sbeet off when the outputs are high, which is confusing.

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Post Your Answer Discard By 741661 “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. That’s probably causing as much trouble as no debounce was.

Datasheet(PDF) – TI store

By using our site, you acknowledge that you have read and understand our Cookie PolicyPrivacy Policyand our Terms of Service. Since you already need one section of aand there are 6 gates per IC, you cpunter go simulate this circuit. Sign up using Email and Password.

I have added a debounce circuit, but still to avail. You can often get away with less, but as you’ve just learned, insufficient decoupling can have weird symptoms. For a circuit board with a ground plane, the usual guideline is at least one cap per 5 ICs.

Email Required, but never shown. WhatRoughBeast 49k 2 28 TTL works much better pulling loads down. As further issues arise I see myself stuck once more with a dysfunctional circuit. By clicking “Post Your Answer”, you acknowledge that you have read our updated terms of dstaprivacy policy and cookie policyand that your continued use of the website is subject to these policies.

  GRIMMETT AND STIRZAKER PDF

I’d reduce that down to something in the nF to 1uF range. Home Questions Tags Users Unanswered. 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.

I added a 0. For breadboards, use a cap for each IC.

Without this buffering, your switch should not work on a button push, only on a release.