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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(PDF) 74161 Datasheet download
Finally, you should not count on TTL outputs driving high, as you have shown. I added a 0. Without this buffering, your switch should not work on a button push, only on a release.
Sign up or log in Sign up using Google. Since you already need one section of aand there are dounter gates per IC, you simply go.
Datasheet(PDF) – TI store
Post dara a guest Name. 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. Also, have you added a 0. As further sheeh arise I see myself stuck once more with a dysfunctional circuit.
Email Required, but never shown. I’m still getting the same effect. I have added a debounce circuit, but still to avail.
For a circuit board with a ground plane, the usual guideline is at least one cap per 5 ICs. That’s probably causing as much trouble as no debounce was. Sign up using Facebook. I switched the LEDs around and connected their input to 5V and their ground to the output pins.
N 4-bit counter not counting properly – Electrical Engineering Stack Exchange
Then I used a pullup resistor for the clear switch. It’s always the simple things. Seet up sueet Email and Password. Home Questions Tags Users Unanswered. Okay I wired 7,9, and 10 together and then connected them to a 1K resistor to 5V. Oh, Ill change that and see what happens. Get into the habit now. For breadboards, use a cap for each IC. In that case, invert the signals going to your LEDs. 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 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. Since you already need one section of aand there are 6 gates per IC, you simply go simulate this circuit.