I am trying to set the
RESET pin, which is set to high via internal pull up, of my MCU (3.3v) to low based on an external pin (3.7v). When the external pin is low, the
RESET pin should be Gnd and if the external pin is high, the
RESET pin should be disconnected (will get back to high because of the internal pull up). I am new to electronics by i think i found a good solution with a p-type MOSFET.
Drain = Gnd
Gate = External pin (0-3.7v)
Right now i am struggling with the wide variety of MOSFET's out there (Farnell has 1000). Could anybody please help me to calculate the right values or give me other advice for solving that problem?