Ssr insufficient current from arduino?

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hello everyone
i have r3 board wiring fotek ssr control 240 vac load (light bulb). know circuit works because load turns on when input ssr connected 9v battery. when connect ssr arduino (say instance 5v , gnd pins),  ssr turns on (led on ssr flicks on) load doesn't. ssr input side reads 5v on multimeter well. i'm wondering if it's current issue since input voltage within correct range ssr (3-32v).

any thoughts?

where did buy ssr ? can give link ? did buy @ ebay or amazon ? perhaps fake.

most ssr need 3v or more , few milli-amps. that's perfect 5v arduino board. not current issue. perhaps wrong ssr.

can test somethine else ? example 5v power supply ?


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