How does it work?
After research on its pin description in the internet, could not find the exact pins.
What controls the delay time about 2 seconds or about 5 seconds of the outputs between 2 output pins?
What controls the output or routine to repeat itself again when output reached by pin?
When input is supplied either with A3 or A4, the IC outputs 5V from 0V at B1 for about 5 seconds, and again drops to 0V from 5. After a gap of about 2 seconds, another 5V is output at B2 for the same time period, and so on until till B4. As B4 drops to 0V, the output repeat for another cycle starting again from B1 to B4. Then the cycle is complete.
If input is retriggered by A3 or A4, the same routine is executed.
Values of B6 to B9 remains same whether the IC is triggered or just at idle.