Hi,
So I've been looking around the forum trying to figure out how to make an LED ramp circuit and so far, the 555 PWM generator circuits seem the best fit.
However, my requirements are a little different. I need an LED Ramp circuit that takes a group of LED's from no light to full and stay at full until turned off. The ramping can't have any human interface and activates by itself. ie, you turn a switch on and the LED's slowly get brighter over say...5 seconds and stay bright until you turn the switch off. I would also like a turn around of less than 30 seconds after turn off so the LED's will ramp again if the light has been off for 30 seconds but not if it hasn't been turned off for 30 seconds.
If possible, I would like to avoid programming anything and keep it cheap.
So I've been looking around the forum trying to figure out how to make an LED ramp circuit and so far, the 555 PWM generator circuits seem the best fit.
However, my requirements are a little different. I need an LED Ramp circuit that takes a group of LED's from no light to full and stay at full until turned off. The ramping can't have any human interface and activates by itself. ie, you turn a switch on and the LED's slowly get brighter over say...5 seconds and stay bright until you turn the switch off. I would also like a turn around of less than 30 seconds after turn off so the LED's will ramp again if the light has been off for 30 seconds but not if it hasn't been turned off for 30 seconds.
If possible, I would like to avoid programming anything and keep it cheap.