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Last Updated on: Tuesday, June 01, 2021 03:06 PM

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More  Latch Circuits

On/Off Latch Circuit Update  (January 9, 2010)

Often you want to turn on and off power to a device with a single pushbutton switch.  The circuit below performs this logic function with just a few tiny parts and can operate from DC supplies between +2v and 5v.  It uses two inverters within a 6 pin SN74LVC2G14 device from Texas Instruments.  Each press of the button toggles between the two on/off logic states.  The logic output is connected to a PMV65XP p-channel FET from Philips. This component should be able to handle 2 Amps of current.

Click on Circuit Below to view PDF of Schematic

Latch Circuit #6, designed

 by David A. Johnson, January 9, 2010

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