Questions tagged [falstad]
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21
questions
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0answers
21 views
Exporting scope values array in Java Circuit Simulator?
https://www.falstad.com/circuit/
In falstad simulator, I would like to export the array of the values taken by the current, while analysing it with the scope. Is it possible to do that ?
0
votes
1answer
72 views
DC current through capacitor in Falstad
I am using the Falstad simulator.
I do not understand why am I getting a DC current through a capacitor in simulation.
This must be an error from the simulator. Please, let me know if I am sane, I ...
3
votes
2answers
173 views
Is this component in falstad a tl431
I'm self studying electronics, I am now familiarizing myself with the tl431, which is pretty much a "variable zener" aparently.
I was shown the following symbol.
I would like to simulate ...
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0answers
72 views
Hold-On-Hold-Off Soft Latch Power Switch Circuit
I'm trying to make a "hold-on-hold-off" type soft latch switch circuit, but I'm having a little trouble. I've found tons of "press-on-hold-off" types, but I haven't been able to ...
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2answers
116 views
Falstad - a bug with mosfets?
I have a schematic in Falstad. It is almost symmetrical (the mosfets are connected by drains and "SWAP D/S" is enable in the second mosfet to be able to connect both).
And this symmetrical ...
0
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1answer
66 views
I want to do make an and-gate but why do I get high when my swich is off?
I want to do make an and-gate but why do I get high when my swich is off?
0
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1answer
81 views
"Noise" in simulator
I have been working on a simple circuit which performs XOR operation.
The problem is that I am seeing a noise-like graph when both inputs are set to 1 (5V) and I have been doing a research on what it ...
0
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0answers
96 views
BJT Differential Amplifier with active load Analysis
I completed the theoretical parts of DC and AC analysis. I want to test them with the simulator. Both DC and AC analysis failed.
I killed DC sources in the AC analysis section and I short-circuited ...
1
vote
1answer
171 views
Falstads circuit simulator : capacitors have initial voltage?
I started playing with Paul Falstad's circuit simulator applet to see if it would be useful for my intro physics students. However, I'm running into a quirk regarding capacitors which I don't really ...
2
votes
1answer
394 views
Circuit simulates in Falstad but not in LTspice
I'm having trouble simulating what should be a simple circuit in LTspice. I am designing a simple PWM-regulated power supply, but I'm running into problems when I try to simulate it.
When I simulate ...
1
vote
1answer
94 views
Diode letting voltage through in circuit simulator - bug or real?
I'm pretty new to electronics, and so I've been modelling my circuits in a Falstad's circuit simulator.
I noticed something which I did not expect, and am curious - is this effect real, or is this a ...
0
votes
1answer
115 views
Beginner - Why do voltage/current behave this way
I was checking falstad and came around this resistor circuit which lost me completely :
Knowing that input voltage is 5v and current is 17mA :
1- Why is the voltage 0 after the 200Ohm resistor ...
1
vote
1answer
655 views
Attempting an audio pre-amplifier circuit with falstad.com
I'm new to electronics and discovered the falstad.com simulator. I wanted to model this audio pre-amplifier circuit:
So I went into falstad and drew this:
My pre-amplifier circuit on falstad
The ...
1
vote
1answer
972 views
Piezo speaker equivalent for circuit simulator
I am using Falstad's circuit simulator to test a design of an Op-Amp based microphone-speaker system...kind of like a megaphone, but the speaker is going to be a piezo plate. Falstad does not have a ...
0
votes
1answer
1k views
How to Plot X/Y in Java Circuit Simulator
Does anyone know how to select the Y variable when doing an X/Y Plot in Java Circuit Simulator? I tried many things and none have worked.
0
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1answer
1k views
Kill Switch schematic
I want to make a kill-switch pedal with on/off LEDs for my guitar. I tested a simple schematic but every time I ground the circuit like the schematic i put below i get an error:
voltage source/...
1
vote
1answer
1k views
How To Charge a Battery in Falstad Circuit?
I'd like to model the charging of a battery in Paul Falstad's Circuit simulator. But, i cannot find a battery component.
Is there any way to do this?
thx
1
vote
2answers
2k views
Active Notch Filter Simulation
I need to build an Active twin- notch filter that will filter out 60Hz. I am following the schematic bellow:
To test the schematic, I am simulating it on Falstad Circuit Simulator, but the 60Hz is ...
0
votes
2answers
106 views
OP Amp - Finding currents [closed]
I am having some difficulty figuring out V_out. I know that it is going to be inverted because V+ = 0 and I know that V- ≠ 0. I don't really know how to go about finding the currents in the system to ...
7
votes
4answers
11k views
Is there a more realistic circuit simulator than Falstad's?
In real life, the 100mA load in the circuit below will experience a brief, partial loss in current and and a drop in voltage when the 4A load is engaged but this simulator is too basic to show that. I ...
1
vote
2answers
967 views
Why isn't this Elenco circuit working in Falstad's simulator?
I'm learning electronics engineering with the Elenco 130-in-1 kit, and I'm trying to get better at visualizing how these circuits are working by making them in the Falstad simulator, but the first one ...
