Treedix Opto-Isolator Breakout Board with Two Photodiodes Built-in Comes with 2 Channel Coupler for Blocking Circuit

High Ohm resistor in series with output voltage means any current draw (even very small) results in a large decrease in voltage on the output. 12V used for my "High Voltage" source resulted in 9V when connected to an Arduino Input. I'm out money for these and also have to replace my $30 Arduino. Avoid at all costs.

This is a good option if you're considering simply buying an ILD213T chip. There is no information other than what you see in the photo. Refer to the chip's datasheet for specs. gnd is signal ground, nc is no connection, in1 and in2 are your input signals. hv and hvg are high voltage supply and high voltage ground. Out1 and out 2 are the corresponding isolated outputs. I am using a 3.3v source signal on my ins and sinking 5v signals on my outs with no connection to HV.

It is baffling to me that a company would go through the time and expense of designing and manufacturing a product but can't take 30 minutes to create basic documentation that the customer would need to be able to use it. They don't even have it listed on the website that is printed on the pcb. This has been a complete waste of time and money and I would ask for a refund but it would waste even more time taking it to UPS to ship it back so I will just accept it as yet another loss to amazon and their ocean of anonymous, fly-by-night sellers who peddle junk that doesn't work and lacks basic instructions.