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Sometimes it is possible to purchase replacement parts for these silicon conductive switch pads. You are more likely to be able to find replacement parts for very high distribution products than for g …

The easiest way to implement a button override function like this is to completely isolate the two systems so that there is no direct electrical connection between them. … Your goal is to get two small wires soldered into the existing circuit that connect to the two sides of the button to be overridden. …

For push button types these would have an action, as you describe, similar to a ball point pen. The push button would operate as a push-on followed by push-off. … The eBay seller did list the item as a "latching" type push button implying that the switch was the push-push alternate action type. …

From the description on the RS web site that you linked to it describes the switch as having the LED light when the button is pressed. …

Some low cost tact switches even have integrated LEDs to light the knob or button. If the lowest cost approach is used an SMT LED is located just adjacent to the tact switch on the board. …

Yes this is possible to implement with digital logic chips. The circuit requirements that you describe would require a state machine design that has four states, one for each of the LED on states and …

Folks here will likely have just as little information as to how your pictured switches work as you do. Get yourself a DVM and use the Ohms scale to measure continuity between switch pins as you mov …

I know that this posting is a "shopping" type question and falls outside the normal design type questions accepted here. But I know the frustration that can occur when a favorite mouse starts to get r …

If you have to keep the existing SPST momentary switch then here is how to convert it to a DPDT switching circuit.

The waveform capture below shows the simulated button press in the top waveform when it is high at 3V which means switch ON. … The lower waveform shows the current through the LED which toggles for each button press. …

Some comments to get you on your way. 1) A simple circuit such as this can easily be plugged into a simulation program such as the free LTSpice available from Linear Technology. 2) You will be able …

Not really feasible. Especially with the lack of design requirements, schematics and what you have tried so far. With that said I suggest that you desolder the DPDT switch and substitute the contact c …

Try wiring up your switch circuit as shown below. This is not the ideal circuit since the low level time of RST is similar to your original circuit but may be good enough for your application. A bette …

A good design approach for this type of switching is to use the push button to turn the power on and then let the MCU be able to read the button state and leave all control for turning the unit off be … Two signals from the MCU are required, one to monitor the button state and a second to hold ON the power or shut OFF power. …

Use an NPN transistor or small signal N channel MOSFET. The GPIO drives the base/gate (the NPN transistor includes a series resistor with the base). The collector/drain is connected to the resistor si …