this post was submitted on 20 Jun 2023
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What creates resistance in a circuit? (discuss.tchncs.de)
submitted 1 year ago* (last edited 1 year ago) by shoeforthepot@discuss.tchncs.de to c/askelectronics@discuss.tchncs.de
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I'm planning to add a momentary switch to a single loop DC circuit. Will this cause any amount of resistance in the circuit? I'm a complete noobie when it comes to electronics, any resource links or clarification is appreciated. I know the type of material/width of wire and a pot will cause resistance but will any component put in line with the circuit cause resistance, and if so how do I go about measuring the resistance for each component within the circuit?

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[โ€“] Susan_B_Good@discuss.tchncs.de 4 points 1 year ago (1 children)

That is pretty much exactly a conventional momentary switch. It just happens to be packaged for use controlling something a little different.

It should be fine for your application.

One thing to note - the contacts will probably "bounce" as the switch is closed. Produce a string of momentary connections and disconnections for, oh, say the first few thousandths of a second. That's perfectly normal for a mechanical switch.

That won't matter in its intended application. But if you are using it with electronics, say counting the number of times the switch is operated - the results can be unexpected.

You can look up "debounce" to see how this can be worked-around.

[โ€“] shoeforthepot@discuss.tchncs.de 1 points 1 year ago

Thanks, I appreciate the clarification on the switch just having a different housing. I'll have to do some further research on "bouncing", interesting stuff.