Low-current, momentary action pushbutton switches, such as PCB-mount ‘tactile’ types, are cheap, and available in an abundance of different styles. Latching types, on the other hand, are often larger, ...

This project demonstrates how to build a simple latching power switch using a push button and an LED connected to an Arduino Uno. The LED turns ON when the button is pressed once, and turns OFF when ...

The Adafruit Push-button Power Switch is a tidy little design that lets you control a DC power source using an everyday tactile button. The breakout uses a latching analog circuit that is triggered by ...

The venerable Stephen Woodward recently published the design idea (DI) “Flip ON flop OFF” that converts a momentary push button to a classic push-on, push-off switch. Figure 1 is an attempt to go ...

A latch circuit can ‘hold’ the circuit in either on or off state until any external signal is applied to it. Latch circuit retains its position (either on or off) even after the input signal is ...

OE Style Push Button Switch On / Off 12 Volt With Work Lights Text and Logo - Blue LED Illumination Single Pole Single Throw (SPST), 3amp Rating Push fit design, supplied with Connector and Loom Mount ...

OE Style Push Button Switch On / Off 12 Volt With Driving Lights Text and Logo - Amber LED Illumination Single Pole Single Throw (SPST), 3amp Rating Push fit design, supplied with White Connector and ...

I'd guess you are looking at a cap failure in the original PSU. 386 era is what, early 90s. 30+ years is a good run. If a replacement PSU doesn't have a switch, you could always hook it to a surge ...