Can 4 Pin Tactile-Micro be Used as On-Off Switch?

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Can we used the 4 pin Tactile-Micro as a on-off switch?
 
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hi Kussy

would you like to clarify a bit ... a 4 pin Tactile-Micro what ?

I assume you mean switch ? like one of these ...

Photo of a small black tactile push-button switch with a square body and a round plastic actuator cap, with four metal pins on the bottom.


I'm not aware of any that stay on ... ie they are all push make - release break

Dave
 
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  • Photo of a black square tactile micro push-button switch with a round plastic cap and four metal terminal pins on its underside.
    untitled.png
    2.7 KB · Views: 502
Kussy said:
Yes that one in the picture
It's just break the circuit and go off
 
OK there are ways to use this style of switch to be able to switch a circuit on and off

here's one example ...

Circuit schematic of a 12V toggle-style switch circuit: a 4013 D flip-flop with R1 1M pull-up, momentary push-button S1, R2 1k resistor driving an NPN transistor Q1 that switches a DC fan.


this process is common in so much gear these days ... TV's VCR's DVD players etc etc

you will understand that that portion of the circuit will always have power on it


cheers
Dave
 
Attachments
  • Circuit schematic of a 4013 D flip-flop toggling a fan: 12V supply, R1 1M pull-up resistor, momentary push-button S1 clocking CP, Q output driving R2 1k into an NPN transistor Q1 that switches the Fan.
    4013_basic.gif
    3.5 KB · Views: 599
no probs

if you do build this to experiment, you may find it suffers a little from switch bounce

that is a pulse produced when contacts make and another when they break. This will cause
double triggering in the flipflop IC

there is a small mod that can be done to stop that

Circuit schematic of a push-button input: +12V rail through a 1M resistor to a node, a 100nF capacitor to 0V, and a pushbutton switch feeding a 1K resistor to 0V.


Dave
 
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  • Circuit schematic of a push-button switch debounce-style input: +12V rail through a 1M resistor to a node with a 100nF capacitor to 0V, and a pushbutton to a 1K resistor to 0V, with an output tap at the switch.
    switch debounce.GIF
    1.9 KB · Views: 726