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Other projects • Re: Goal: 20mhz PWM signal at 8-bit resolution. Possible?

First of all, this is not for an LED, but a laser diode. 6.5V, 130mA current (power output is 50mW).

Secondly, I need the laser to modulate between 256 levels of brightness, 10–20 million times per second. One method that has been discussed is instead of PWM, I can simply push 8-bits at a time in parallel out to 8 GPIO pins at 20mhz frequency, then pass those into a current-output DAC module. Does that seem feasible?

I could go down to 128 levels (7 bits) and 10mhz frequency, too.
i would have started with the b*t word but I'm staying kind! It is still an LED, laser or not.

Provide a datasheet or I'm done here as your provide information looks insuffiecient to me.

Statistics: Posted by aBUGSworstnightmare — Sat Apr 20, 2024 4:32 am



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