rtr12 posted:I would like to try this out. Not sure I can make a PCB? If so that would take me some time, but I might try it anyway? Breadboard is probably what I will start with. I know GRJ can probably put one out in a few minutes. He may even have one posted here by the time I post this?
My only question (I think) would be what type of caps did you use and were the resistors precision or just regular old 5% resistors? I am going to place a Digikey order for all that I don't have. Or maybe just order it all along with some extras.
Thank you again Adrian, for doing all this stuff and posting here for the rest of us. I find it all very interesting, make that fascinating! As I have said before most is over my head, but still very interesting and some may even rub off on me one of these days.
Hey!
The RC network at the front blocks 60Hz and keeps 1 MHz. Even if the values were off a factor of 10 times it should work fine. The filter as drawn cutsoff signals below a few KHz, but 10Khz or 100Khz is also fine. The r and c for the timebase sets the light flash at about a second. Depending on which version of 74h123 you buy the equation for the duration is different so you may want to try different combinations until you’re happy with it.
