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1. Thorwegian ❄️ (thor@berserker.town)'s status on Monday, 25-Mar-2024 16:45:24 JST Thorwegian ❄️

   Most switch debouncing calculators assume a circuit like this (1). Looks like a recipe for destroying a switch. The cap will short to ground and immediately dump all its current into the switch, potentially creating an arc and burning the switch over time.

   I've seen better diagrams with a resistor between the cap and the switch (2), but none of the online calculators assume such a circuit.

   There's also a version with the switch in between two resistors (3). In that case, the recharge time IS affected by the second resistor. It supposedly keeps a minimum current flowing through the switch to prevent corrosion. Doesn't sound like something that would seriously affect a momentary switch, which is what I'm using for my application.

   I'm sitting here and running a mental SPICE simulation on these to decide on which one's best.

   #electronics

   • Thorwegian ❄️ (thor@berserker.town)'s status on Monday, 25-Mar-2024 16:45:22 JST Thorwegian ❄️

     in reply to

     • gadgetoid

     @gadgetoid Software is eating the world. The industry is turning every electrical engineer into a software engineer. Nothing is components and everything is just chips. Meanwhile, I'm a former software engineer who is tired of that job and is happy whenever there is an alternative to software. What I'm building isn't strictly necessary in 2024. 10 musical synthesisers can be replaced with a single laptop. But what a boring world it would be where everything is just a computer.

     :awoo_tired: shotgun snuggler :clownpiece_smug: likes this.
   • gadgetoid (gadgetoid@fosstodon.org)'s status on Monday, 25-Mar-2024 16:45:23 JST gadgetoid

     in reply to

     @thor is reading the button at 10kHz and using signal processing to denounce in software not the golden path these days? 😬

     :awoo_tired: shotgun snuggler :clownpiece_smug: repeated this.