What is the purpose of the LM385 in the Arduino UNO Rev. 3 ? I see one of its output simply feeds a MOSFET (?) while the other lights a LED. Thanks.

UNO Rev. 3: What is the LM358 for ?

CrossRoads October 22, 2012, 12:28pm 2

1/2 is used as a voltage comparator, to select whether the board is powered from USB or from Vin.
The other buffers D13, removing the load created by the L LED and its current limiting resistor.

Topic		Replies	Views
Arduino uno - LM358D without usb power ? Project Guidance	7	2401	May 5, 2021
how the Arduino Uno power automatically slected between USB and external power? General Electronics	6	4957	May 6, 2021
LMV358 Replacement General Electronics	4	320	June 10, 2023
How to work the external power supply management ? General Electronics	4	5518	May 6, 2021
USBVCC switching components on Mega2560? Project Guidance	5	1175	May 5, 2021

UNO Rev. 3: What is the LM358 for ?

Related Topics