These synchronous, presettable counters feature an inter- nal carry look-ahead for application in high-speed counting designs. The DM74LSA and. 74LS datasheet, 74LS pdf, 74LS data sheet, datasheet, data sheet, pdf, Fairchild Semiconductor, Synchronous 4-Bit Binary Counters. The LSA/A/A/A are high-speed 4-bit synchronous count- ers. They are edge-triggered, synchronously presettable, and cascadable. MSI building.
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Then I used a pullup resistor for the clear switch.
Datasheet PDF –
WhatRoughBeast 49k 2 28 In that case, invert the signals going to your LEDs. Get into the habit now.
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 simulate dataxheet circuit. So your outputs should be connected like. As further issues arise I see myself stuck once more with a dysfunctional circuit. 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.
That’s probably causing as much trouble as no debounce was.
Fairchild Semiconductor – datasheet pdf
Sign up using Email and Password. Home Questions Tags Users Unanswered. I’m still getting the same effect. For breadboards, use a cap for each IC.
74161 Datasheet PDF
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. 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.
Since you already need one section of aand there are 6 gates per IC, you simply go.
Without this buffering, your switch should not work on a button push, only on a release. Datashedt switched the LEDs around and connected their input to 5V and their ground to the output pins. 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. Sign up using Facebook.
I’d reduce that down to something in the nF to 1uF range. Also, have you added a datasheeet. Oh, Ill change that and see what happens.
datasueet For a circuit board with a ground plane, the usual guideline is at least one cap per 5 ICs. It’s always the simple things.