Hi I'm having some trouble in building a circuit based on one or max two 555 timers and at this point I don't know if it's even possible.
Basically I want to achieve a breating effect (slow on, slow off) of two strings of led (150mA max, so perfectly fine for 555 output) using a 555 timer and so far I've came across this schematic:
First of all this circuit doesn't have enough power, and second the fading effect is only during on time but not during off time (it does turn off abruptly). The supply voltage is 5V so I've added two transistors at pin3 (after the capacitor) but it doesn't work: I have an ugly effect.
So my question is: It's possible to achieve an alternating breathing effect with 555 or not?
Basically I want to achieve a breating effect (slow on, slow off) of two strings of led (150mA max, so perfectly fine for 555 output) using a 555 timer and so far I've came across this schematic:
First of all this circuit doesn't have enough power, and second the fading effect is only during on time but not during off time (it does turn off abruptly). The supply voltage is 5V so I've added two transistors at pin3 (after the capacitor) but it doesn't work: I have an ugly effect.
So my question is: It's possible to achieve an alternating breathing effect with 555 or not?