LEDEnthusiast
- Jan 27, 2016
- 2
- Joined
- Jan 27, 2016
- Messages
- 2
Hello everyone, first post here. I've been interested in this subject for a while, but have never actually built anything on a PCB. That being said I'm not 100% familiar with it all, but not exactly a noob either.
Recently, I came up with the idea to construct a fade circuit for my truck's dash lighting. Simple premise, should be easily built. The idea is, you turn the dash lighting on and it comes on smoothly until it reaches full intensity. Turn the dash lighting off and it goes from full intensity fading down to off. I have LEDs installed in my dash, so I'll have to have PWM for this.
I'm thinking an NE555 timer would be the perfect heart of this project, the PWM signal generated by the NE555 controlling a transistor or mosphet of some description. As for the timing of the fade, I'm considering a potentiometer with a capacitor, the charging time for the capacitor ultimately controlling the duty cycle, in turn switching the mosphet or transistor rapidly until full brightness or completely off is achieved.
On youtube I found a PC fan controller circuit, made by GreatScott!, complete with schematic and all the parts listed. I figure if you switch around the potentiometer and add a capacitor in such a way for the charge rate to modify the duty cycle would suit fine.
So, I suppose I should ask the million dollar question. Would this actually work?
Recently, I came up with the idea to construct a fade circuit for my truck's dash lighting. Simple premise, should be easily built. The idea is, you turn the dash lighting on and it comes on smoothly until it reaches full intensity. Turn the dash lighting off and it goes from full intensity fading down to off. I have LEDs installed in my dash, so I'll have to have PWM for this.
I'm thinking an NE555 timer would be the perfect heart of this project, the PWM signal generated by the NE555 controlling a transistor or mosphet of some description. As for the timing of the fade, I'm considering a potentiometer with a capacitor, the charging time for the capacitor ultimately controlling the duty cycle, in turn switching the mosphet or transistor rapidly until full brightness or completely off is achieved.
On youtube I found a PC fan controller circuit, made by GreatScott!, complete with schematic and all the parts listed. I figure if you switch around the potentiometer and add a capacitor in such a way for the charge rate to modify the duty cycle would suit fine.
So, I suppose I should ask the million dollar question. Would this actually work?