Can this be used with a 3.3v pwm signal like the output from a raspberry pi?

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I have recently checked these modules and they do work with 3.3V logic providing that the PWM pulse width is adequately long  to trigger the opto-coupler. 
I had three of 8 ordered come with with short circuit voltage regulators though. ( I removed the reg and supplied at 12.00V DC instead and they worked OK.
The circuit is not very linear when used with pulse widths as intended ( ie to match the two stage low pass filter before the op amp ) due partly to the excessive capacitance (C5) connected across the opto coupler ( C5) input and also the op-to coupler response. It works better with this IC removed ( easy to do as its a PTH IC) but to get less than 1 bit error at 8 bit conversion major mods are required to the circuit including removal of the opto-coupler and a 2:1 gain increase in the op amp stage to give a nominal 0-5.3V output for 3.3V logic pulses
When modified it can achieve better than 0.5 lsb linearity at 8 bit with an analogue output update rate of approx 50Hz.  Stability and drift will depend on the stability of the 3.3V pulse train but if thats stable it can provide a cost effective and accurate DAC.

ASIN	B07DK51KXR
Best Sellers Rank	50,263 in Business, Industry & Science ( See Top 100 in Business, Industry & Science ) 4 in Digital Signal Processors
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Manufacturer	DollaTek
Package Dimensions	15.5 x 9.8 x 1.5 cm; 10 g

PWM turn voltage module 0%-100% PWM turn to 0V-10V voltage

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