Hi all,
I have electric curtains on my windows which are regulated by a simple DOWN-OFF-UP button. Current function of this switch is that as long as it is pressed the curtains fall or raise and when they reach end position the motor is switched off automaticaly. What I have designed so far is simple 555 timer schematic which when activated by a short press will provide contact for a relay which will be on for about 30-40 seconds which will fully open/close my curtains.
The problem is that sometimes I want the curtains half way or so open. I want when I single press and release the button shortly to have the timer activated, but if I hold for more than say -1-2 seconds this timer to be invalidated and manual release of the button to stop the opening/closing of the curtains.
Can you help me how should I modify the schematic?
I have electric curtains on my windows which are regulated by a simple DOWN-OFF-UP button. Current function of this switch is that as long as it is pressed the curtains fall or raise and when they reach end position the motor is switched off automaticaly. What I have designed so far is simple 555 timer schematic which when activated by a short press will provide contact for a relay which will be on for about 30-40 seconds which will fully open/close my curtains.
The problem is that sometimes I want the curtains half way or so open. I want when I single press and release the button shortly to have the timer activated, but if I hold for more than say -1-2 seconds this timer to be invalidated and manual release of the button to stop the opening/closing of the curtains.
Can you help me how should I modify the schematic?
Last edited: