I think the problem is the switch isn't discharging the capacitor fast enough... even when it is, the reset pulse low is just to short...exxos wrote: Sun Nov 11, 2018 10:11 pm What capacitor value do you have in at the moment 22uf ? and 1K ?
I was using 47uF and 940R. I'll try 100nF and 470K as you mention.exxos wrote: Sun Nov 11, 2018 10:18 pmI think the problem is the switch isn't discharging the capacitor fast enough... even when it is, the reset pulse low is just to short...exxos wrote: Sun Nov 11, 2018 10:11 pm What capacitor value do you have in at the moment 22uf ? and 1K ?
Try something like 100nF and 470K any higher values on either and it will malfunction (according to simulation anyway)
Damn... Try 47k..Icky wrote: Sun Nov 11, 2018 11:45 pm Hmm - with 100nF and 470K white screen and no boot. Reset button stays on white screen no boot or flicker of reset.
Its a crazy one this one trying to find the right combination.
wonder if the 555 circuit could be rejigged to give a inverted output 
Yep 47K made no difference still white screenexxos wrote: Mon Nov 12, 2018 12:03 am Aye, doesn't seem like its going to behave
with this circuit. I tried out so many combinations today.That would be great if that is the case. The less chips the better.exxos wrote: Mon Nov 12, 2018 12:16 am I will have a look for a better reset chip tomorrow.. There are things like the LP3470 , must be some chip out there which has a good drive current so can do away with the LS05 all together..
