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Std EditionRaspi 3B Latching MOSFET switch

License: CC-BY-SA 3.0

Published Time:2017-04-01 17:31:19
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Description

Latching Mosfet switch Based on work at: http://www.mosaic-industries.com/embedded-systems/microcontroller-projects/raspberry-pi/on-off-power-controller

R8 allows a shorter wait period on switch hold / raspi gpio driven low or a 3.3v Zener diode can/should be used to protect GPIO pin

Mosfets are separate devices In PCB V1 the P-Channel device is TO-220 while the N-Channel is DPAK In PCB V2 both are DPAK footprint

N-Channel mosfet is not critical anything that will start conducting around 3v will do

P-Chan mosfet more important Logic Level FET is needed and should have as low of an RDS(on) at 4.5v as possible

See Code Attached!

Documents

Mosfet Sw PCB1

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Mosfet Sw PCB2

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Mosfet Latch Switch

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