How to connect a led into a gps module and a sim module

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hi everyone

im gonna start saying im doing gps tracker using arduino, sim800l module , gps module im using modules



sim800l module


gps module

well, problem...

the 2 modules have signal led, led of sim module works in way: when sim have signal reception, blinks once per 5 seconds, when doesnt have signal reception blinks once time per second.

the led of gps starts blinking when have signal reception.

so... tried connect 5mm led on sim module , gps module, because need see signal reception, dont know how make it! mean tried connecting anode of led of module anode of 5mm led doesnt work :c

so after that, try read voltage level tester, blink fast, can have voltage read, can read 200mv~. hope can me problem please.

thanks.

as existing small leds are  driven direct sim chip have carefull not overload output current of 2 leds.

typically better use transistor load minimal



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