Hey guys - I wired up a simple circuit with a shift register - the eventual goal is to connect it to Ardunio.
But I'm having some troubles with the test circuit. First of all, here's the datasheet: http://www.st.com/stonline/books/pdf/docs/1910.pdf
I've wired up the register with 8 LEDs on the 8 outputs, 5v to the Vcc, reset, and two switches - one at the clock pin and one for the two inputs. The LEDs are wired to ground in-series with a resistor
When I switch on my power supply, all the LEDs turn on. Switching the switches doesn't do anything. What I'd like to see is: switch on input and toggle clock, one light comes on. Toggle clock, light advances and finally disappears.
I've gone over the circuit and I can't figure out what could possibly be wrong. Am I misunderstanding something about this component?
Any help is greatly appreciated...