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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Fairchild Semiconductor – datasheet pdf
In that case, invert the signals going to your LEDs. I’d reduce that down to something in the nF to 1uF range. I’m still getting the same effect. Sign up using Facebook. Email Required, but never shown. Okay I wired 7,9, and 10 together and then connected them to a countee resistor to 741661. For breadboards, use a cap for each IC. As further issues arise I see myself stuck once more with a dysfunctional circuit.
Without this buffering, your switch should not work on a button push, only on a release. I added a 0. So your outputs should be connected like. 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.
Oh, Ill change that and see what happens. Also, have you added a 0. You can often get away with less, but as you’ve just learned, insufficient decoupling can have weird symptoms. WhatRoughBeast 49k 2 28 That’s probably causing as much trouble as no debounce was. Finally, you should not count on TTL outputs driving high, as you have shown.
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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 Email and Password. Since you already need one section of aand there are 6 gates per IC, dara simply go.
(PDF) 74161 Datasheet download
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. TTL works much better pulling loads down. Sign up or log in Sign up using Google. I switched the LEDs around and connected their input to 5V and their ground to the output pins.
For a circuit board with a ground plane, the counher guideline is at least one cap per 5 ICs. Since you already need one section of aand there are 6 gates per IC, you simply go simulate this circuit.