556 timer as two delays

I need a 556 to time two sparate delays going to two separate outputs using the same trigger. I guess I just attach the trigger to both trigger pins. What I do not know is how to get a timer to wait so long before sending the output. I need a fifteen second delay before a buzzer sounds and a twenty second delay before a motor turns. 1. Switch is pressed 2. Buzzer sounds fifteen seconds after switch is pressed 3. Motor turns twenty seconds after switch is pressed. The motor should turn five seconds after the buzzer sounds. Could anyone explain, in detail, how I could obtain this setup? Any instruction would be greatly appreciated. Thank you.
Daniel Ramsey

Posted by dr.p737 (dr.p737@juno.com) on 08/11/2003, at 22:10 GMT

556 timer as two delays

Use formula t=R X C
15 =150K X 100uF
20 =200K x 100uF
use a variable resistor so you can get exact time
a useful kit to teach yourself theory of 555 monostable can be bought from
www.geocities.com/sirkituk

Posted by Anonymous on 09/11/2003, at 23:29 GMT

Schematics

I actually already have formula and the resistors. What I need is some schematics that show how to wire them. As for the kit, I have a twenty dollar limit on this project. All I need is a drawing showing how. I have drawings showing how to time an output, but I don't have drawings showing how to delay an output.

Posted by dr.p737 (dr.p737@juno.com) on 10/11/2003, at 14:04 GMT

556 timer as 2 delays

You might be interested in 555 Projects by E.A. Parr. Published by Bernard Babani ref. BP44 ISBN 0-85934-047-3.

Posted by Robert Neill (varient412@yahoo.co.uk) on 14/05/2010, at 11:49 GMT