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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Home Questions Tags Users Unanswered. Then I used a pullup resistor for the clear switch.
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. Get into the habit now.
74LS Datasheet pdf – Synchronous 4-Bit Binary Counters – Fairchild Semiconductor
I’d reduce that down dataaheet something in the nF to 1uF range. Post as a guest Name. Okay I wired 7,9, and 10 together and then connected them to a 1K resistor to 5V. For a circuit board with cuonter ground plane, the usual guideline is at least one cap per 5 ICs.
It’s always the simple things. TTL works much better pulling loads down. Email Required, but never shown.
Finally, you should not count on TTL outputs driving high, as you have shown. Sign up using Facebook. I added a 0. You can often get away with less, but as you’ve just learned, insufficient decoupling can have weird symptoms.
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.
Since you already need one section of aand there are 6 gates per IC, you simply go. I’m still getting the same effect.
N 4-bit counter not counting properly – Electrical Engineering Stack Exchange
Oh, Ill change that and see what happens. I switched the LEDs around and connected their input to 5V and their ground to the output pins.
Sign up using Email and Password. For breadboards, use a cap for each IC. I have added a debounce circuit, but still to avail. Also, have you added a 0.
That’s probably causing as much trouble as no debounce was. In that case, invert the signals going to your LEDs.
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 datsheet the outputs are datashest, which is confusing.
Since you already need one section of aand there are 6 gates per IC, you simply go simulate this circuit. WhatRoughBeast 49k 2 28 So your outputs should be connected like. Without this buffering, your switch should not work on a button push, only on a release.