Hi I would like to create a simple fade in and fade out effect ideally for a common anode RGB but I will settle for a single colour LED.
Design requirements:
- fade in 0-5v LED + resistor
- fade out 5-0v LED + resistor
- incorporate BJT or MOSFET driven by 5v CMOS logic IC
To reiterate: CMOS logic signal -> BJT / MOSFET -> fade in / out LED
This project comprises LEDs that switch at frequencies less than 1hz so I would like the effect to be as linear as possible. I suppose this topic is about fading the switching signal into the transistor not the LED but I don't see why it couldn't happen after the transistor switches. I imagine this can be accomplished with resistors and capacitors only.
Regards,
Design requirements:
- fade in 0-5v LED + resistor
- fade out 5-0v LED + resistor
- incorporate BJT or MOSFET driven by 5v CMOS logic IC
To reiterate: CMOS logic signal -> BJT / MOSFET -> fade in / out LED
This project comprises LEDs that switch at frequencies less than 1hz so I would like the effect to be as linear as possible. I suppose this topic is about fading the switching signal into the transistor not the LED but I don't see why it couldn't happen after the transistor switches. I imagine this can be accomplished with resistors and capacitors only.
Regards,
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