IC 74161 DATASHEET PDF
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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For a circuit board with a ground plane, the usual guideline is at least one cap per 5 ICs. So your outputs should be connected like.
You can often get away with less, but as you’ve just learned, insufficient decoupling can have weird symptoms. Oh, Ill change that and see what happens. Then I used a pullup resistor for the clear switch. 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.
I’d reduce that down to something in the nF to 1uF range. I added a 0.
For breadboards, use a cap for each IC. Sign up using Email and Password. Sign up using Facebook.
N 4-bit counter not counting properly – Electrical Engineering Stack Exchange
In that case, invert the signals going to your LEDs. Post as a guest Name. Sign up or log in Sign up using Google. Also, have you added a 0. 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.
It’s always the simple things. Since you already need one section of aand there are 6 gates per IC, you simply go. Home Questions Tags Users Unanswered.
(PDF) 74161 Datasheet download
Get into the habit now. I’m still getting the same effect.
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.