Frankco
New Member
I'm just getting back into electronics, I played around with it long ago, and need a little help with an 8-bit series to paralell-out shift register.
I have a SN74LS164N 8-bit shift register.
SN74LS164N pdf, SN74LS164N description, SN74LS164N datasheets, SN74LS164N view ::: ALLDATASHEET :::
I'm trying to send a pulse from a 555 timer to step the register.
On the chip pins 1 and 2 are the data input. I think I have to jumper the two and use the output of the 555 timer (pin 3) to send a signal to the connected pins 1 and 2. Each time the 555 timer sends a pulse to pin 1 and 2 the bit should shift to the next Q# pin on the 8-bit register.
Pin 14 is the 5 volt postive pin and pin 7 is the common or ground.
My question is about pin 8, which is the clock. Can I leave this pin unconnected or does it have to have a voltage applied to it? I'm not sure of its function other than maybe how fast the data shifts. But wouldn't that be controlled by the 555 timer sending a signal to pins 1 and 2?
For the reset pin, # 9, can I leave that unconnected?
Also, if anyone has a simple circuit design using this chip I'd be enternally greatful!
Thank you,
Frank
I have a SN74LS164N 8-bit shift register.
SN74LS164N pdf, SN74LS164N description, SN74LS164N datasheets, SN74LS164N view ::: ALLDATASHEET :::
I'm trying to send a pulse from a 555 timer to step the register.
On the chip pins 1 and 2 are the data input. I think I have to jumper the two and use the output of the 555 timer (pin 3) to send a signal to the connected pins 1 and 2. Each time the 555 timer sends a pulse to pin 1 and 2 the bit should shift to the next Q# pin on the 8-bit register.
Pin 14 is the 5 volt postive pin and pin 7 is the common or ground.
My question is about pin 8, which is the clock. Can I leave this pin unconnected or does it have to have a voltage applied to it? I'm not sure of its function other than maybe how fast the data shifts. But wouldn't that be controlled by the 555 timer sending a signal to pins 1 and 2?
For the reset pin, # 9, can I leave that unconnected?
Also, if anyone has a simple circuit design using this chip I'd be enternally greatful!
Thank you,
Frank