helppppppppppppppppppppppppppppppppp!for design timer
From: yar (st_yar_at_yahoo.com)
Date: 07/28/04
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Date: 27 Jul 2004 17:57:32 -0700
I asked a question before and received answers which, although
helpful
to some extent, did not provide me with what I need to know. So, I
decided to rephrase the question.
HI'
I am yar intellegence then I decide send my problem to solve it
for me .I want to make a timer circuit to control 4point with this
following specification :
1- point one connect for an adjustable time with(variable
resistance)then point one disconect aand point two is connect
2- point two connect for an adjustable time with(variable
resistance)then point two disconect and point three is connect
3- point three connect for an adjustable time with(variable
resistance)then point three disconect and point four is connect
4- point four connect for an adjustable time with(variable
resistance)then point four disconect and point one is connect another
time
note: my problem is how can make the first circuit (555) triger the
next circuit
IF there is aanother useful IC's to catch my goal then why not
note :I try this circuit but it isnot worked
right(http://www.tarrypin.dail.pipex.com/images/555Timingchain-yar.gif)
and I this component for each 555
pin1----gnd
pin2----10k resistance&in4148diode&connect to the next 555 pin 3
pin3----connect to a coil relay
pin4----connect to pin8
pin5----connect to 0.01 uf ceramic capacitor(the capacitor in between
pin 5 &gnd)
pin6----connect to 1000 uf&25volt electrolytic(polar)(the negative leg
is connected to gnd)&39k ohm connected in between pin6 & pin7
pin7----connect to 1 M ohm variable resistance in between pin 7&pin 8
pin 8----connect to the vcc (the power supply is 12volt adapter)
I want any help
thank you YAR
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