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. DMDMDM Synchronous These synchronous presettable counters feature an inter- Office Distributors for availability and specifications.
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TTL works much better pulling loads down. So your outputs should be connected like. For a circuit board with a ground plane, the usual guideline is at xounter one cap per 5 ICs.
I’m still getting the same effect. Whenever I press the clock button I get all of the leds on except maybe one or two, with some flashing 74116 the button press. 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. It’s always the simple things. Get into the habit now.
Datasheet(PDF) – TI store
Then I used a pullup resistor for the clear switch. As further issues arise I see myself stuck once more with a dysfunctional circuit. Sign up using Facebook. Email Required, but never shown. In that case, invert the signals going to your LEDs. WhatRoughBeast 49k 2 28 Sign up or log in Sign up using Shdet. 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.
Okay I wired 7,9, and 10 together and then connected them to a 1K resistor to 5V. Sign up using Email and Password. 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 774161 is low, and off when the outputs are high, which is confusing.
I’d countef that down to something in the nF to 1uF range. Since you already need one section of aand there are 6 gates per IC, you simply go. Post as a guest Name.
N 4-bit counter not counting properly – Electrical Engineering Stack Exchange
Since you already need one section of aand there are 6 gates per IC, you simply go simulate this circuit. Home Questions Tags Users Unanswered. I added a 0. Finally, you should not count on TTL outputs driving high, as you have shown.