I'm building a simple 4-bit computer (a Nibbler) from 74 series ICs on a breadboard. Right now I'm working on 74LS173AN IC registers. I can't make it work. I have connected the input enable (pin 9,10), output control (1,2), and clear (15) to ground and some data inputs to vcc. The output pins (Q1-Q4) are connected to ground via LEDs. I'm simulating the clock signal by swithing a tact-switch on/off (with ground connected by 10k resistor and direct connection to VCC.
I tried different connections and searched web (many hopes with https://www.youtube.com/watch?v=9WE3Obdjtv0&t=14s, but it didn't help). Nothing works. I suspect there might be a problem with clock signal, but I would really appreciate the opinion from an experienced electronic specialist.