Opto-isolator Breakout

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I have BM1Z102FJ Evaluation Board (ACOUT AND Prim_GND) to be input to GPIO on ESP32-S3 DevKit.

I think Opto-isolator Breakout is needed between BM1Z102FJ ACOUT and ESP32-S3 GPIO (see also MAX14483 on MAX22707EVKIT).

Please confirm. How do I wire up and use opto-isolator-breakout with no soldering facilities.

Timing signal of zero-crossing is to be passed-through opto-isolator-breakout otherwise too risky for proof-of-concept.

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Hi Marcus,

If you’re just after a way to connect to through-holes without soldering for a test setup, I’m a fan of IC hooks:

From the looks of things, you don’t need anything else, as that optoisolator board is well equipped to handle the 5V pulse from your evaluation kit.

-James

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Hi Marcus

I was going to say “with great difficulty” but I had not thought of wires with these little hook connectors.

Just what are you going to do here. These zero crossing devices are designed to switch or provide a signal when the input voltage crosses Zero volts (AC input). If this input does not go to zero it will not switch so no meaningful output.
Cheers Bob

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Hi Marcus

I just had a look at the schematic of that zero crossing evaluation board. It looks like the 5V for the output pulse is provided by a 100k pull up resistor. If this is the case it WILL NOT drive the LED in the opto isolator. You will need an OP amp or something in between connected as a voltage follower to supply the current for the LED.
Cheers Bob

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Thank you Robert - my preferred go-to is LM741-Operational-Amplifier

Likely I’m doing belt-n-braces but optimization comes after success

Cheers, Marcus

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Thank you James - I’ve got a breadboard so IC Hook Test Leads look great

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Hi Marcus

To get your 5V you will need a “rail to rail” Opamp, the LM741 is not one of these (I don’t think).
Cheers Bob
PS. Although the 741 will work with a single supply I think it refers a split (+ & -) supply. You could get 5V output by using a higher supply voltage but to get anywhere ground pin 4 would have to connect to a negative supply of at least 2V. Easier to use a rail to rail amp.

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This is proof-of-concept hence my purchase plan:-

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Optimization after success, as discussed earlier.