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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74LS Datasheet pdf – Synchronous 4-Bit Binary Counters – Fairchild Semiconductor
Email Required, but never shown. TTL works much better pulling loads down. Couunter can often get away with less, but as you’ve just learned, insufficient decoupling can have weird symptoms.
Okay I wired 7,9, and 10 together and then connected them to a 1K resistor to 5V. Finally, you should not count on TTL outputs driving high, as you have shown.
I’d reduce that down to something in the nF to 1uF range.
(PDF) 74161 Datasheet download
Also, have you added a 0. Without this buffering, your switch should not work on a button push, seet on a release. For a circuit board with a ground plane, the usual guideline is at least one cap per 5 ICs.
I’m still getting the same effect. Since you already need one section of aand there are 6 gates per IC, you simply go.
4-bit Synchronous Counter with Asynchronous Clear
I added a 0. That’s probably causing as much trouble as no debounce was.
Home Questions Tags Users Unanswered. I have added a debounce circuit, but still dats avail. WhatRoughBeast 49k 2 28 Oh, Ill change that and see what happens. I switched the LEDs around and connected their input to 5V and their ground to the output pins.
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 using Facebook. So your outputs should be connected like. Then I used a pullup resistor for the clear switch.
It’s always the simple things. 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 or log in Sign up using Google.
Get into shee habit now.