These synchronous, presettable counters feature an inter- nal carry look-ahead for application in high-speed counting designs. The DM74LSA and. µç×ÓÆ÷¼þ²É¹º½Ì¨£ IC×ÊÁÏ²éÑ¯ÍøÕ¾£º µç×Ó¹ ¤³Ì¼ÊõÂÛ£º / 4 位二进制同步计数器（异步. 74LS datasheet, 74LS pdf, 74LS data sheet, datasheet, data sheet, pdf, Fairchild Semiconductor, Synchronous 4-Bit Binary Counters.
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Okay I wired 7,9, and 10 together dtasheet then connected them to a 1K resistor to 5V.
N 4-bit counter not counting properly – Electrical Engineering Stack Exchange
That’s probably causing as much trouble as no debounce was. For breadboards, use a cap for each IC.
I have added a fatasheet circuit, but still to avail. 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. 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. Sign up using Facebook.
Without this buffering, your switch should not work on a button push, only on a release. For a circuit board with a ground plane, the usual guideline is at least one cap per 5 ICs.
I switched the LEDs around and connected their input to 5V and their ground to the output pins. Sign up or log in Sign up using Google. So your outputs should be connected like.
Get into the habit now. Home Questions Tags Users Unanswered. Finally, you datashdet not count on TTL outputs driving high, as you have shown. WhatRoughBeast 49k 2 28 Oh, Ill change that and see what happens. You can often get away with less, but as you’ve just learned, insufficient decoupling can have weird symptoms.
I’d reduce that down to something in the nF to 1uF range.
Since you already need one section of aoc there are 6 gates per IC, you simply go simulate this circuit. Sign up using Email and Password.
(PDF) 74161 Datasheet download
I’m still getting the same effect. Since you already need one section of a datashest, and there are 6 gates per IC, you simply go. Email Required, but never shown.