I'm using a DigitalWrite, on my Arduino Nano, to switch an output High 5V, but need to drop the voltage to the coil input on a solid-state opto-relay to a range of 900mV to 1.4V for it's acceptable control voltage.
Originally I was going to just use a simple [resistor voltage divider circuit], but started to think about a voltage regulator instead. I found this one, and read through the specs, but I keep seeing "constant current" and wondering, since the control voltage "and current" will periodically switch high or low (not a lot), would this be a viable component?
Use a resistor to limit the current into the optocoupler LED. The data sheet will state the acceptable range of input current.
Post a link to the relay module, so we can be sure of what you are talking about.
Thanks! Here is the one I'm using....
You have what you need. There is no coil, of course.
I work in Industrial Control Sales (24V and up) , so forgive my misuse of the terms coil vs control voltage. So to achieve control voltage to activate the contacts - voltage divider circuit?
Just use a resistor to limit the input current, as you would with any LED.
8 mA LED current is the minimum required for a 120 mA load on the SSR output.
Light Bulb! Totally missed the method and concept of controlling this IC. Thank you jremington!
Rather.
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