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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Oh, Ill change that and see what happens. I have added a debounce circuit, but still to avail. Without ddatasheet 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.
WhatRoughBeast 49k 2 28 Whenever I press the clock button I get all of the leds on except maybe one or two, with some flashing dafasheet the button press. Sign up using Facebook.
As further issues arise I see myself stuck once more with a dysfunctional circuit. I’m still getting the same effect. It’s always the simple things.
That’s probably causing as much trouble as no debounce was. Post as a guest Name.
74LS Synchronous 4-Bit Counter Buy Online in India – Robomart
Get into the habit now. I’d reduce that down to something in the nF to 1uF range. Home Questions Tags Users Unanswered.
Email Required, but never shown. I switched the LEDs around and connected their input to 5V and their ground to the output pins.
(PDF) 74161 Datasheet download
Since you already need one section of aand there are 6 gates per IC, you simply go. Finally, you should not count on TTL outputs driving high, as you have shown. Also, have you added a 0. Sign up using Email and Password. Then I used a pullup resistor for the clear switch.
74LS161 Synchronous 4-Bit Counter
In that case, invert the signals going to your LEDs. You can often get away with less, but as you’ve just learned, insufficient decoupling can have weird symptoms.
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. So your outputs should be connected like simulate this circuit — Schematic datasheeh using CircuitLab You may object jc this will provide LEDs which are on when the output is low, and off when the outputs are high, which is confusing.
For breadboards, use a cap for each IC. I added a 0.