68 Threads found on edaboard.com: Falstad
I made simulations of the schematics.
falstad's animated simulator has a spark gap component. I adjusted its parameters to act like a neon bulb.
1) What are the values of R and C (fig.1/fig.2) to that will make a 10sec. flash rate?
A neon bulb typically has a 220k resistor in series when connected to house current. So I used
Elementary Electronic Questions :: 12-13-2012 06:51 :: BradtheRad :: Replies: 16 :: Views: 2845
What helped me to grasp the principles of switched-coil converters was an animated, interactive simulator.
Below is a link to my conceptualization of a simple buck-boost.
Click it to open the website, load my schematic, and run it on your computer. (Click Allow to load the Java applet.)
Watch th
Analog Circuit Design :: 12-15-2012 06:26 :: BradtheRad :: Replies: 1 :: Views: 1053
It might help to watch an interactive simulation of an SR flip flop in its simplest form.
The link below is to a SR flip-flop made from 2 transistors.
It will open the website, load the schematic and run it on your computer. (Click Allow to load the Java applet.)
Click the two logic inputs at the
PLD, SPLD, GAL, CPLD, FPGA Design :: 12-10-2012 07:03 :: BradtheRad :: Replies: 2 :: Views: 799
There is an interactive animated simulator that will help to aid in understanding. Its library of circuits includes the multivibrators you mention.
Click the link below. It will open the website at .
It will load a monostable multivibrator constructed from transistors, and will run it on your computer. (Click Allow to lo
Hobby Circuits and Small Projects Problems :: 11-30-2012 19:59 :: BradtheRad :: Replies: 5 :: Views: 1150
falstad's animated simulator does not specifically list a D flip-flop made from discrete components.
It provides a link (below) which will open a simulation of a CMOS flip flop made from discrete mosfets. It will run interactively on your computer. (Click Allow to load the Java applet.)
Click the logic inputs which are labeled S and R. Watch
Analog Circuit Design :: 11-30-2012 04:37 :: BradtheRad :: Replies: 2 :: Views: 2151
I guess it's all right to show you the layout that works for me, since it started with your
I made this using an animated simulator found (free) at:
The op amps need the right vo
Analog Circuit Design :: 11-25-2012 14:01 :: BradtheRad :: Replies: 6 :: Views: 3466
falstad's animated simulator is ideal for observing the action.
It turns wires green when they are positive polarity, gray when they are neutral.
Its library of circuits comes with a D flip flop made from individual gates.
It's just a matter of drawing a wire from the Not-Q output to the D input.
Click the link below to open the we
ASIC Design Methodologies and Tools (Digital) :: 11-24-2012 10:03 :: BradtheRad :: Replies: 1 :: Views: 748
Have you tried playing with a simulation?
Here is my screenshot using falstad's animated simulator. It is great for showing immediate results when you adjust
I find that the biasing is tricky to get ri
Analog Integrated Circuit (IC) Design, Layout and Fabrication :: 11-22-2012 18:38 :: BradtheRad :: Replies: 3 :: Views: 1230
I find falstad's animated simulator easy to use. It's free. It's interactive.
It shows current bundles moving through wires, and portraying the interaction between components.
It comes with a library of circuits.
You can construct your own circuits. You can save them to disk and read them again.
This link will open
Software Problems, Hints and Reviews :: 11-13-2012 09:38 :: BradtheRad :: Replies: 4 :: Views: 3625
I had to spend hours playing with an animated simulator (falstad's), before I got a notion what is happening in these switched coil converters.
Is it possible to write enough equations to correctly solve for everything simultaneously or do I need to select a particular parameter as a starting point are work outwards from there?
Th
Power Electronics :: 10-30-2012 07:24 :: BradtheRad :: Replies: 10 :: Views: 1670
I think it's a setup or hold pb. You additionally should latch the outputs. See this one: JK Flip Flop
Analog Circuit Design :: 10-13-2012 13:42 :: erikl :: Replies: 3 :: Views: 695
I use an electronic circuit simulator written in Java. It opens windows for importing text.
It has a few of the same commands which are in your code, and some more besides.
The source code is available as a free download at the link below. You can examine it since it is not scrambled.
Click the link called 'The source'
PC Programming and Interfacing :: 10-02-2012 19:17 :: BradtheRad :: Replies: 1 :: Views: 553
is it enough to then have a sliding contact on the primary copper tube coil in order to do the fine tuning?
Guess it's okay as long as it gives you a fine enough range of adjustment.
I have been watching an animated simulation of a Tesla coil.
The link below will open the website, load the schematic, and run it on your
Hobby Circuits and Small Projects Problems :: 09-25-2012 03:53 :: BradtheRad :: Replies: 1 :: Views: 1262
Link to animated simulation showing how an inductive load creates reactive power factor, and briefly explaining how power is lost because of phase difference:
Showing how power factor can be corrected using a capacitor (avoiding loss of power):
Microcontrollers :: 08-24-2012 21:00 :: BradtheRad :: Replies: 8 :: Views: 1162
I happened to be online at this hour and recognized the 'v1.5 applet' as the falstad simulator.
I imported your schematic into the simulator.
The bad connections are the red circles where you used scope probes as though they are wires.
Scope probes are attached to your circuit at one end or the other. They do not carry current. To see a s
Analog Circuit Design :: 08-12-2012 06:30 :: BradtheRad :: Replies: 3 :: Views: 3942
When I use an op amp to charge a capacitor through a resistor (even just the op amps output resistance), sensing the capacitor voltage, it oscillates when it hits the target voltage (as expected since its a low pass filter), e.g.
Analog Circuit Design :: 08-06-2012 18:38 :: jasonc2 :: Replies: 18 :: Views: 3911
GBHT, there is an animated simulator you may find easier to use.
It's at the website.
You can easily create moving oscilloscope traces.
I have constructed a circuit something like what you are doing. Here is the link. (I used two resistors. I left it for you to substitute a capacitor.)
Click Allow to permit the connection.
Analog Circuit Design :: 07-30-2012 17:52 :: BradtheRad :: Replies: 8 :: Views: 1101
The link below is to an interactive animated simulation of the Edge-Triggered D Flip-Flop shown in post #4.
The website has some more flip-flops (as well as an entire library of circuits).
Click 'OK' when a window comes up asking if you want to load the java applet.
PLD, SPLD, GAL, CPLD, FPGA Design :: 07-02-2012 04:24 :: BradtheRad :: Replies: 22 :: Views: 5728
The circuits are similar enough. With a few switches/muxes to route your feedback signals, it could be done with D flops.
Divide by 4 example
Divide by three example
Elementary Electronic Questions :: 04-13-2012 01:00 :: enjunear :: Replies: 1 :: Views: 2672
I can recommend to check
these falstads java simulators too...
Math, Physics, and Engineering Applets
Analog Circuit Design :: 02-03-2012 22:00 :: kak111 :: Replies: 3 :: Views: 1599