Disclaimer- I am a real amature in electronics, I am a master electrician by trade, but have only dabled in electronics.
I am designing a solid state circuit and basicaly need the equivilent of a 12V TDPU relay that is not the size of a juice box, low power consumption low $ and will operate in the 10-15 minute range.
Despite all I read about NOT using too large of a capacitor, I tried to design my own circuit with a 555 timer. I just breadboarded it and it failed. Is there any hope for this circuit or is there a better option.
I will try to attach my sketch from sketchup so you can see where I am starting. Note that I deleted the rest of the circuit and left only the timer portion, I need time to start when R contact closes and need to pick up the 12V TR relay after the adjustable time delay of about 10 minutes or slightly longer.
I am designing a solid state circuit and basicaly need the equivilent of a 12V TDPU relay that is not the size of a juice box, low power consumption low $ and will operate in the 10-15 minute range.
Despite all I read about NOT using too large of a capacitor, I tried to design my own circuit with a 555 timer. I just breadboarded it and it failed. Is there any hope for this circuit or is there a better option.
I will try to attach my sketch from sketchup so you can see where I am starting. Note that I deleted the rest of the circuit and left only the timer portion, I need time to start when R contact closes and need to pick up the 12V TR relay after the adjustable time delay of about 10 minutes or slightly longer.
Attachments
-
42.1 KB Views: 205