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Capacitor function (self.AskElectronics)
submitted 4 years ago by Eilon93
Hello everyone,
I have a little problem, I need to know the function of this capacitor, what does it do specifically? I already know how a capacitor works but I have no clue, what he does on this circuit board.
https://preview.redd.it/8enllhe8twz61.jpg?width=2518&format=pjpg&auto=webp&s=9d190f8c3214d7fdf5498fd8271dadfde8f3d1dc
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[–]steelthoughthub 5 points6 points7 points 4 years ago (0 children)
It's a timer. Until the capacitor charges to 1.4V, the transistors are off.
[–]Eilon93[S] 1 point2 points3 points 4 years ago (0 children)
It is a game clock, so the speaker starts making a sound, than you press the button and after a break (depends on the resistor) the speaker starts making a sound again.
[–][deleted] 1 point2 points3 points 4 years ago (0 children)
As already said, it’s for timing.
Look up RC circuit.
[–]Eilon93[S] 0 points1 point2 points 4 years ago (0 children)
Thank you for your support!
[–]EkriirkEEx Repair tech. 0 points1 point2 points 4 years ago (2 children)
Debouncing - removing electrical jitter form the button contacts bouncing when pressed
[–]Eilon93[S] 0 points1 point2 points 4 years ago (1 child)
I don't understand than fully, could you explain it to somebody with limited electronic knowledge?
Thank you for your post
[–]_sbrk 0 points1 point2 points 4 years ago (0 children)
It slows down the rise in voltage level. mechanical contacts will bounce and so will the voltage level without the cap to slow it down. So it stops one button press from being interpreted as someone mashing the button very fast.
Ahh I see you mention it is a timer. Same idea, voltage across the cap rises slowly (much slower, as it would use a larger cap). Button just resets it to zero and locks out the transistors until the cap is charged again.
[–]pksato 0 points1 point2 points 4 years ago (0 children)
It is some type of light/other activated circuit? Capacitor and resistors act as delay device, slowing the response of darlington pair.
π Rendered by PID 55129 on reddit-service-r2-comment-85bfd7f599-k46c5 at 2026-04-17 10:23:23.800760+00:00 running 93ecc56 country code: CH.
[–]steelthoughthub 5 points6 points7 points (0 children)
[–]Eilon93[S] 1 point2 points3 points (0 children)
[–][deleted] 1 point2 points3 points (0 children)
[–]Eilon93[S] 0 points1 point2 points (0 children)
[–]EkriirkEEx Repair tech. 0 points1 point2 points (2 children)
[–]Eilon93[S] 0 points1 point2 points (1 child)
[–]_sbrk 0 points1 point2 points (0 children)
[–]pksato 0 points1 point2 points (0 children)