h3lladvocate
New Member
I'm kind of new at this. I have a 16 pin dual 4 bit counter. I've set up a 555 timer IC so that the output high frequency is about 15Hz. I've connected 5 V to the Vcc on pin 16, the output for the 4 bits each to an LED, so i can see the state of each, pin 8 is connected to 0 V, and pin 2 is connected to the output of the timer. This is what im really not sure about. I've looked up the data sheet for the counter(74HC390) and it only has 3 inputs, a reset, divide by 2 and divide by 5. Im not sure where to connect the output of the 555 timer to. Can anyone help me with my counter. I can't find any tutorials on how to wire one up, and the manufacturer "assumes" you know how to use it...
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