normad
Member
i looked up some articles and i think i understand the 555's monostable circuit.. but when i tried simulating it on ltspice i fail to get the expected results..
i have a few questions..
so if the 555 triggers when the trigger voltage reaches 33% of vcc would it trigger if i connect the trigger to ground? else how am i supposed to trigger it?
in the simulation the output = vcc from the beggining and it doesnt go to zero when threshold reaches 66% vcc and the capacitor doesnt start discharging..
please help..
ive attached the ltspice file
thanks![Smile :) :)](data:image/gif;base64,R0lGODlhAQABAIAAAAAAAP///yH5BAEAAAAALAAAAAABAAEAAAIBRAA7)
i have a few questions..
so if the 555 triggers when the trigger voltage reaches 33% of vcc would it trigger if i connect the trigger to ground? else how am i supposed to trigger it?
in the simulation the output = vcc from the beggining and it doesnt go to zero when threshold reaches 66% vcc and the capacitor doesnt start discharging..
please help..
ive attached the ltspice file
thanks