/diy/ - Do It Yourself

>>1468827
>open problem of light brightness
well, that's not the problem is it? light brightness using an unspecified number of parallel LEDs is the problem. RULE 4
>could be
so you don't even lift. ok
PCA9685 $2.33 in singles, 16-channel 12-bit PWM I2C with built-in oscillator + (power driver = a MOSFET to ground per channel, or a BJT and resistor if you swing that way, or if you're driving a single low-current LED, connect directly with a resistor) per channel
vs. $3 + an output transistor for each channel + a heatsink for any significant number of LEDs on the channel + an op-amp to control the V2I converter per channel + 40 or so passives, some of which may be power resistors
or, for that matter, there are WS2812B strips for about $3/m, though they are a bit fiddly to control and not economical for single-color-per-strip usage
>different knowledge than you
apparently limited to the last thing you read about. may I suggest you spend more time looking at how things are done in practice and reasoning out why they did it that way instead of power V-I converters
>autist
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