Need a refresher on basic circuits How would the circuit in this schematic operate.I understand the symbols i think.You have your power source (battery), it’s in a parallel circuit with a capacitor on one branch, and a resistor and diode in the other branch.How would this function is what I’m trying to get the grasp of
C1 charges up nearly instantly, LED glowsremove battery, C1 is powering LED until C1 depletes>totally not homework
>>16534564It’s not though I just recently went through a course on basic electronic for my job. I won’t even start applying it until March. I just don’t want to forget how this stuff works, and I figure it would be interesting to make a 4chan post about it
>>16534561The capacitor filters the high frequency noise in the DC supply. To understand why, you need to know the very basics of the fourier transform and the frequency behavior of a capacitor.For hand calculations you can approximate the LED as a device that let's zero current for V < Vd and for V >= Vd no matter what current flows, the voltage remains fixed at V = Vd. So Vdc - Vd voltage drops on the resistor and from ohm's law you get the current through that branch.If you need some more precision you can use the exponential characteristic curve of the diode, build an equation system using KVL and KCL and solve it to get current and voltages.
>>16534568so homework
>>16534913>The capacitor filters the high frequency noise in the DC supply.>dc supply>high freqidealised dc vs actual dc?
>>16534917It is either an actual DC supply or an ideal DC supply that can be switched on and off. In the latter case the capacitor's purpose would be making transient behavior of the circuit smoother due to energy storage. But mathematically this is still equivalent to filtering the high frequency content (in this case of a rectangular pulse).
The capacitor is useless in this application.
>>16534913>High frequency noise from pile on batteriesQuite opposite, the leaking capasitor you find from chink mart will cause it
>>16534913https://en.m.wikipedia.org/wiki/RC_circuit#Parallel_circuitLol someone was half sleep during electronics course.
>>16535024The parasitic resistance of the DC supply and the line together with the capacitor form an RC lowpass filter with the load being the resistor and LED.
>>16534938The capacitor slowly turns the LED off when power is disconnected
>>16535180not opfiltering was a pretty fun thing to get my head around.I want to go back and mess with some simple electronic circuits to build a band pass filter at a tuned voltage.I also want to properly understand capacitance and induction as deeply as I possibly can because it still feels sort of trippy that everything has a degree of both of them acting concurrently or that we still don't have a proper way to understand what's actually occurring and how to calculate the forces induced.
>>16535180why tf would a battery have high frequency noise thoughand why would a basic bitch LED circuit care? lmao it's just a light
>>16535474>a tuned voltage.*frequency
>>16535484The DC supply is coming off of a rectifier, put you have to peak under the abstractions skirt
What are the two diagonal arrows?
>>16536040led
>>16535959Maybe Elon is right cause I’m sixth generation American
>>16536041You mean like light emitting from diode? I get it. Thank.
>>16534561Treat the LED as a .7 volt drop, or whatever it is depending on the color, or treat it as a short, and the capacitor as an open. Then you can solve with just the single resistor.
>>16534564>>16534568Ain’t this the same but sparks instead of light? The capacitor cuts off hysteresis to provide rapid on/off and prevent arc.
>>16537543The concept is pretty much the same
>>16534561I didn't learn about how to deal with diodes in my circs class and only touched capacitors in AC analysis.
Is there a better way of solving second order parallel/series rlc circuits that doesn't involve having to memorize these retarded i(t) and v(t) equations for damped, underdamped and critically damped??i'm fed up with this approach
>>16538216You should be able to derive equations by inspecting the circuit. If this isn't where you are at, then your teacher is teaching you wrong.
