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A quick googling gave me theor 74HCT, which might fit the bill.

Quad 3-state buffer Hi enable. Dual 4-input NAND gate. BCD counter synchronous reset. Grumpy Mike, your circuit might be the ticket!

Octal 3-state inverting buffer. BCD to decimal decoder. You all may be right, I may be trying to do something that the Arduino can already do, but I just thought that if I could do it off board, I could save the processing cycles for something more important.

I’m unsure if you can use timer0, as that’s also used for millis and some other rather important stuff Arduino-wise. I have never used it, but judging from the datasheet it would seem so. Into the feed your number with the shift out tutorial. Quad 2 to 1 line mux Inverter. Triple 3-input OR gate.


BIN counter asynchronous reset. I don’t know how often the pulses will be coming in, because it will depend on what the sensor is detecting.


Octal 3-state D type flip flop. Hex inverting buffer gate. I am doing a handful of analog readings which as I’ve read take significant amount of timeI am currently driving 2 servos PWM outputand I still have more features I am trying to add.

Schmitt Hex inverting gate. Octal 3-state bus tranceiver. I just thought that if I could have something external count the pulses, I could have daasheet Arduino doing something more important. Quad 2-input 3-state mux.

Octal edge triggered latch. Quad 3-state buffer Lo enable. BIN counter synchronous reset. For needs like you describe, there is always the option of using a small microcontroller and implement the functionality you need.

Hex 2-input NOR enable buffer. Click on the appropriate section below for the relevant data sheets. Dual 4-bit binary counter.

Octal transparent inv op latch. Dual 4-input NOR gate. I didn’t see your answer until after! Quad 2-input NAND gate. You can use a 74HC 8 bit counter feeding into one side of a 74HC85 magnitude comparatorthen feed the other side from a shift register 74HC Triple 3-input AND gate.


Quad 2-input NOR gate. I didn’t want to use the Arduino directly. I’m not sure how the hardware interrupt is made. Hex inverting schmitt trigger. Dual 2 to 4 line multiplexer.

74HC85 Datasheet PDF – Philips Electronics

Quad 2-input exclusive OR gate. Hex 3-state inverting buffer. And not the lest, what westfw says! But it will cost you some 2 PWM datasheey for each timer you use. Just for the record, my reference to any “lengthy mumbling answer” was not intended for you, but something I didn’t include after all.

I also satasheet a somewhat lengthy mumbling answer combining presettable counters and whatnot, but then I remembered there are those things called “divide-by-N” counters. Is there any chance the Arduino might miss this “count reached” signal? It can divide the input frequency from 3 to We hold data-sheets on many items that are found in the stores inventory. Quad 2 to 1 line multiplexer.