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Author Topic: 3 stage lamp  (Read 5013 times)

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SiEger

• Guest
3 stage lamp
« on: March 25, 2008, 22:50:11 PM »
Hi again

i want to design a simple light bulb circuit so that with a switch or button (better) will have 4 stages:
one will be off
One will be on
One will be blinking, having more time off than on (actually it will be flashing like) at about 1Hz
and One will be blinking having equal time on and off at about 1Hz

Is it hard? Can i find it somewhere?

Thank you

SiEger

FrED

• Guest
Re: 3 stage lamp
« Reply #1 on: March 28, 2008, 00:11:52 AM »
what do you mean 4 stages?

kam

• Hero Member
• Posts: 1849
Re: 3 stage lamp
« Reply #2 on: March 28, 2008, 00:41:18 AM »
You can use a switch and a 555 with 2 different resistors. Use the calculator for 555

http://www.pcbheaven.com/handbook/calculus/index.php?calc=555astable

SiEger

• Guest
Re: 3 stage lamp
« Reply #3 on: March 28, 2008, 14:02:53 PM »
How to use the 555 to do all these?

kam

• Hero Member
• Posts: 1849
Re: 3 stage lamp
« Reply #4 on: March 28, 2008, 22:53:38 PM »
make an astable oscillator.

With a 4 position switch, you will have the following:

1- off
2- on
3- the 555 works in a way that t1 is much smaller than t2 (10% duty cycle)
4- the 555 works in 50% duty cycle

Use the calculator to calculate the parts. Use 1μF or bigger capacitor to have 1Hz.

SiEger

• Guest
Re: 3 stage lamp
« Reply #5 on: April 03, 2008, 23:08:48 PM »
AWESOME!

Thanks!