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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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 daatsheet high, which is confusing.
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. For a circuit board with a ground plane, the usual guideline is at least one cap per 5 ICs.
Get into the habit now. Whenever I press the clock button I get all of the leds on except maybe one or ddatasheet, with some flashing during the button press. I added a 0. 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.
Post as a guest Name. Sign up or log in Sign up using Google. I have added a debounce circuit, but still to avail. Finally, you should not count on TTL outputs driving high, as you have shown. Sign up using Facebook. Home Questions Tags Users Unanswered. WhatRoughBeast 49k 2 28 TTL works much better pulling loads down. Without this buffering, your switch should not work on a button push, only on a release.
Since you already need one section of aand there are 6 gates per IC, you simply go simulate this circuit. Sign up using Email and Password. You can often get away with less, but as you’ve just learned, insufficient decoupling can have weird symptoms. Email Required, but never shown. I’d reduce that down to something in the nF to 1uF range. Oh, Ill change that and see what happens.
Also, have you added a 0.
I switched the LEDs around and connected their input to 5V and their ground to the output pins. That’s probably causing as much trouble as no debounce was.