Mike S
Newly Enlightened
- Joined
- Apr 29, 2011
- Messages
- 132
I'm building a circuit to power an RGBW MC-E where I'll have control over the brightness of each emitter. The PWM signals will be coming from four 555 timers (one for each color) and the output pin of each timer will be connected to a separate enable pin of an On Semi CAT4101 linear LED driver IC. The circuit will be powered by four AA batteries.
I plan to include the 0.1 uF filtering capacitor between Vin and GND as it's shown in the datasheet, however I'm still worried the multiple PWM signals could cause a lot of noise, and possibly a visible flicker in the output of the LED's. Is there anything I should consider before populating the PCB? Maybe a capacitor in parallel with each LED? Any help would be appreciated.
I plan to include the 0.1 uF filtering capacitor between Vin and GND as it's shown in the datasheet, however I'm still worried the multiple PWM signals could cause a lot of noise, and possibly a visible flicker in the output of the LED's. Is there anything I should consider before populating the PCB? Maybe a capacitor in parallel with each LED? Any help would be appreciated.