wow,did u create that 555 calculator with VB?the 555 timer that u designed to help me,is it a monostable or astable configuration?seen astable to me.I would really like to know the formular on how to calculate the period because my lecturer would want to see how i went about calculating it. is it like T=0.7(R1+R2)C2 ? just to clarify is that buzzer at the bottom of the schematic u posted?which output pin of the cd4024 should i connect the driver to?
hi,
It was VB5, look at the caption bar on the Calc Form, it shows the formula for the mode selected,
Its a an astable configuration for your 555.
I would connect your 12v beeper across the relay coil.