The PIR sensor's output goes high when motion is detected. Output signal is at 3.3V and goes through a 1500 ohm resistor.
I use this output signal to trigger an interrupt in my microcontroller, on the rising edge of the signal.
I would like to have a visual indication of when the output is HIGH. Do I need an extra resistor for the LED, or can I just place the LED in parallel with the MCU?
Thank you.
I use this output signal to trigger an interrupt in my microcontroller, on the rising edge of the signal.
I would like to have a visual indication of when the output is HIGH. Do I need an extra resistor for the LED, or can I just place the LED in parallel with the MCU?
Thank you.
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