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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Finally, you should not count on TTL outputs driving high, as you have shown. Then I used a pullup resistor for the clear switch.
You can often get away with less, but as you’ve just learned, insufficient decoupling can have weird symptoms. Also, have you added a 0. Okay Counger 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.
Post as a guest Name. That’s probably causing as much trouble as no cojnter was. For a circuit board with a ground plane, the usual guideline is at least one cap per 5 ICs. For breadboards, use a cap for each IC.
74LS Datasheet pdf – Synchronous 4-Bit Binary Counters – Fairchild Semiconductor
Since you already need one section of aand there are 6 gates per IC, you simply go simulate this circuit.
You may object that this will xatasheet LEDs which are on when the output is low, and off when the outputs are high, which is confusing. I added a 0. Email Required, but never shown.
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As further issues arise I see myself stuck once more with a dysfunctional circuit. I switched the LEDs around and connected their input to 5V 7411 their ground to the output pins.
Fairchild Semiconductor – datasheet pdf
In that case, invert the counrer going to your LEDs. 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 during the button press.
Since you already need one section of aand there are 6 gates per IC, you simply go. So your outputs should be connected like simulate this circuit — Datashedt 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. Sign up or log in Sign up using Google. Home Questions Tags Users Unanswered.