Learn how to build a Latching Power Switch Circuit (Auto Power Off Circuit), that you can use to power off the ESP32, ESP8266, Arduino, or any microcontroller.
This could be the cheapest way yet to convert a momentary switch into an on-off power controller.
A latching power switch for a light emitting diode (“LED”) flashlight is disclosed which includes a vessel comprising upper and lower components for receiving and containing a lithium cell battery, a means of using the anodic and cathodic leads from the LED, an aperture provided through the ...
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A simplified self-latching relay switching circuit includes a switch, a power shunt circuit including a power node and a shunting device for shunting power from the node to ground, a relay for latching power into the circuit, and a passive circuit which operates the shunting device. When the ...
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A switch for coaxial circuits is shown, including a moveable contact, a controller which controls the position of the moveable contact, and a latch to hold the moveable contact in the latest position
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More particularly, the switching circuit renders the gain and input stages operative concurrently by drawing current therefrom to a single fixed current drain when the follow mode is selected, and renders the latching circuit operative by drawing current therefrom to the same current drain when the ...