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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I have added a debounce circuit, but still dataaheet avail. Then I used a pullup resistor for the clear switch. Sign up using Email and Password.
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. Post as a guest Name.
N 4-bit counter not counting properly – Electrical Engineering Stack Exchange
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. For breadboards, use a cap for each IC.
I’m still getting the same effect. So your outputs should be connected like. Oh, Ill change that and see what happens.
Okay I wired 7,9, and 10 together and then connected them to a 1K resistor to 5V.
I added a 0. TTL works much better pulling loads down.
74LS Synchronous 4-Bit Counter Buy Online in India – Robomart
Also, have you added a 0. Sign up or log in Sign up datashwet Google. Get into the habit now. Since you already need one section of aand there are 6 gates per IC, you simply go simulate this circuit. For a circuit board with a ground plane, the usual guideline is at least one cap per 5 ICs. I’d reduce that down to something in the nF to 1uF range.
(PDF) 74161 Datasheet download
Email Required, but never shown. So your outputs should be connected like simulate this circuit — Schematic created using CircuitLab You may object daatsheet this will provide LEDs which are on when the output is low, and off when the outputs are high, which is confusing. I switched the LEDs around and connected their input to 5V and their ground to the output pins. You can often get away with less, but as you’ve just learned, insufficient decoupling can have weird symptoms.
74LS161 Synchronous 4-Bit Counter
Without this buffering, your switch should not work on a button push, only on a release.