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.
|Published (Last):||16 January 2006|
|PDF File Size:||6.40 Mb|
|ePub File Size:||8.19 Mb|
|Price:||Free* [*Free Regsitration Required]|
Post as a guest Name.
TTL works much better pulling loads down. 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. Sign up or log in Sign up using Google.
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. 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.
4-bit Synchronous Counter with Asynchronous Clear
WhatRoughBeast 49k 2 28 So your ddatasheet should be connected like. Sign up using Email and Password. Finally, you should not count on TTL outputs driving high, as you have shown. Since you already need one section of aand there are 6 gates per IC, you simply go simulate this circuit.
Without this buffering, your switch should not work on a button push, only on a release. I added a 0.
I switched the LEDs around and connected their input to ddatasheet and their ground to the output pins. I have added a debounce circuit, but still to avail. Get into the habit now.
For breadboards, use a cap for each IC. It’s always the simple things.
Also, have you added a 0. For a circuit board with a ground plane, the usual guideline is at least one cap per 5 ICs. 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.
74LS Datasheet pdf – Synchronous 4-Bit Binary Counters – Fairchild Semiconductor
In that case, invert the signals going to your LEDs. Since you already need one section of aand there are 6 gates per IC, you simply go. Home Questions Tags Users Unanswered. Oh, Ill change that and see what happens.