74LS Synchronous 4-bit Binary Counters. These synchronous, presettable counters feature an internal carry look-ahead for application in high-speed. 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.
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You can often get away with less, but as you’ve just learned, insufficient decoupling can have weird symptoms.
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.
Then I used a pullup resistor for the clear switch. 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.
Sign up or log in Sign up using Google. Email Required, but never shown. I have added a debounce circuit, but still to avail. It’s always the simple things. Sign up using Facebook. Without this buffering, your switch should not work on a button push, only on a release.
4-bit Synchronous Counter with Asynchronous Clear
I added a 0. Home Questions Tags Users Unanswered. As further issues arise I see myself stuck once more with a dysfunctional circuit. Get into the habit now. Sign up using Email and Dqtasheet. Since you already need one section of aand there are 6 gates per IC, you simply go.
N 4-bit counter not counting properly – Electrical Engineering Stack Exchange
Okay I wired 7,9, and 10 together and then connected them to a 1K resistor to 5V. I’d reduce that down to something in the nF to 1uF range.
Whenever I countwr the clock button I get all of the leds on except maybe one or two, with some flashing during the button press. I switched the LEDs around and connected their input to 5V and their ground to the output pins. TTL works much better pulling loads down. WhatRoughBeast 49k 2 28 That’s probably causing as much trouble as no debounce was. So your outputs should be connected like.
Post as a guest Name. Since you already need one section of aand there are 6 gates per IC, you simply go simulate this circuit. In that case, invert the signals going to your LEDs.
I’m still getting the same effect. For breadboards, use dataaheet cap for each IC.