Current supply from GPIOs of nRF4122 for mutiple LED

[HLR]

Hi All,

I am designing circuit to Turn ON 4 LEDs at a time based on high and low of GPIO

Supply voltage is 3.3V my doubt below circuit is fine whether it will work fine for using 3.3V as supply

[Andreas]

Hi,

 

The topology should be fine, but R3 = 2.2 Ohm might be a little small. This should be easy to test and adjust if needed though.

 

Best regards,

Andreas

[HLR]

Hi,

Since each LED is configured for 10mA so used 2.2E instead of 2.5E 

Hope current supply limit of nRF doesn't affect this circuit

[Andreas]

Hi,

 

Isolated, the 'LED1' GPIO might be a little high, but below 5 mA should be fine. You should also not be sourcing 5 mA from more than 3 GPIOs at a time.

 

Best regards,

Andreas