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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Sign up using Email and Password. WhatRoughBeast 49k 2 28 Since you already need one section of aand there are 6 gates per IC, you simply go simulate this circuit. Get into the habit now. I’m still getting the same effect. As further issues arise I see myself stuck once more with a dysfunctional circuit.
Sign up or log in Sign up using Google. So your outputs should be connected like simulate this circuit — Schematic created using CircuitLab You may object that this will provide LEDs counger are on when the output is low, and off when the outputs are high, which is confusing.
For a circuit board with a ground plane, the usual guideline is at least one cap per 5 ICs. Home Questions Tags Users Unanswered.
You may object that this will provide LEDs which are on when the output datashest low, and off when the outputs are high, which is confusing. Email Required, but never shown.
Then I used countr pullup resistor for the clear switch. For breadboards, use a cap for each IC. Post as a guest Name. Okay I wired 7,9, and 10 together and then connected them to a 1K resistor to 5V.
N 4-bit counter not counting properly – Electrical Engineering Stack Exchange
Sign up using Facebook. 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. 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. That’s probably causing as much trouble as no debounce was. Oh, Ill change that and see what happens. I’d reduce that down to something coujter the nF to 1uF range.
Fairchild Semiconductor – datasheet pdf
Also, have you added a 0. I added a 0. Without this buffering, your switch should not work on 774161 button push, only on a release. I have added a debounce circuit, but still to avail. TTL works much better pulling loads down. So your outputs should be connected like.
I switched the LEDs around and connected their input to 5V and their ground to the output pins.