Latching Power Switch Circuit Examples
A latching power switch lets you turn a device on or off with a single button press—perfect for battery‑powered projects where every milliamp counts. These circuits use a momentary pushbutton and a few components to toggle power without a mechanical slide switch.
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About these examples.
In this collection, you’ll find working examples tailored to popular microcontrollers and ICs: ESP32, ATtiny85, Raspberry Pi Zero, and the MAX16054. Each diagram includes a complete schematic, component values, and a simulation-ready layout so you can understand the latch mechanism at a glance.
Need a custom version? Open our circuit diagram maker to drag, drop, and tweak a latching power switch circuit—no installation required, and it’s free to start.
Make one yourself.
Place the latching core
Start with a flip‑flop, a dedicated latching IC, or a transistor‑based latch to hold the power state.
Connect the momentary switch
Wire the pushbutton to the latch’s trigger input, ensuring proper debouncing if needed.
Add power MOSFET and load
Use a P‑channel MOSFET (or N‑channel with a boost) to switch the main power rail to your load.
Include protection and status
Insert series resistors, TVS diodes, and an optional LED to indicate power state.
Simulate and export
Run a quick simulation to verify latch action, then export to a PCB layout tool or share as a PNG.
Frequently asked questions
What is a latching power switch?
How does a soft‑latch circuit work?
Can I use a latching switch with a microcontroller?
What components are needed for a latching power circuit?
How do I prevent accidental power‑off?
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