Yet another great video Dave. I have been a software engineer most of my career. I made a commitment to myself to become proficient in basic micro electronics by the end of 2015. The first three months have gone well. Have read a lot of books, watched hundreds of videos and have hacked many things around the house including doorbells, greenhouse ventilators, light/time automated switches, etc. Even bought a Rigol DS1054z. I tell my wife that your videos are my bridge drug to EE geekdom,
when u find the world of electronic simulation its amazing that they are close to reality and u dont have to do the real building over and over again to get a project done!! thumbs up!!!
its just the algebraic sign convention used across the whole circuit. so if you were solving the problem on paper youd have to label the positive and negative side on the resistor. and based on that youll get a negative or positive current. and we assume that current flows from the positive side through the negative side of the resistor (or whatever convention you use) but if you get negative current it just means your initial direction of flow you picked is wrong and its flowing in the otherway
Great video. I've had the program for ages and never managed to get worthwhile results! Time for another play. More please. Thanks for your time. Thumbs UP.
Excellent tutorial Dave. I've used LTSpice quite a bit, but I've always rushed straight for the transient or AC simulation options. I will definitely be using the DC operating point simulation in the future. Thank you!
@MrMac5150, I am not sure Dave described that answer so well. Think about the resistor having a DC volt meter permanently connected to it, so while connecting the resistor in a certain orientation makes no difference to the actual circuit, it does make a difference to the reading in just the same way as measuring the voltage across the resistor with a DC voltmeter would be positive or negative depending on the way you place the meter probes.
Inside audio comunitty there's no one teaching.... the opposite...people use to hide their knowledge...i am the one goes against that and i use to teach all basics about audio amplifiers..including DC design..but i cannot go deep...i learned by myself...there's a lack of knowledge and you is the man that can fill this gap to these half million of souls around the whole world... i hope you understand this can be your destiny...to be this man
It's impressive how many people throw out nasty comments and suggestions to do this or that at their convenience. You gotta have a thick skin Dave. Keep up the good work.
You don't control the current flow, it's just that pin labels are fixed and depending upon which way around you put it, the calculation either comes out positive or negative. Current still flows the same way in the circuit.
Thanks for the tutorial Dave! I've struggled with LTSPICE in the past, but I believe it's never worth learning a dumbed-down tool just to learn more quickly - it takes longer in the end when you waste time re-learning the skill with the good tool later too...
Looks very good, although as you said, is complex to set up. I'm now in love with "Circuit Wizard", which can show ALL specific voltages/currents among components, by simply hovering the mouse over wires/devices... in REAL TIME while running. APART from it's incredibly powerful "Auto-PCB" creation !! It knows the dimensions of all the components including terminals & relays etc., for single or dual sided boards, and designs the whole PCB without crossovers. You can manually intervene, and change what ever you want.....
Thanks Mate!! I'm a total newb at electronics. I actually came here hoping to find an easier way to just look at how to find voltage bias with LTSPICE, I started with 5SPice and it is easier in that regard. What I found instead was that I wasn't valuing my resistors properly. m versus Meg!! What a simple thing and now my circuit finally works. Argggggg.
Hi Dave. Good video. Only wish you done more of those. Like , how to add an external spice model ( just like you are suggesting in this video) . I’m just getting started with Spice and so far you are the best out there at explaining for beginners.
I know unix spice from my EE time, as we use it in our laboratory class. But that time spice did not have a GUI....as you said one have to feed a ascii file (the nodelist) into it. Thanx for this LTspice tutorial!! :)
Excellent Dave! Finally! Yeah, there are some LTSpice tutorials out there, but it is all a bit catch as catch can. Hopefully you can correct all that with a methodical series that goes beyond those and the surface. Price is right, powerful, flexible -but no fluff. Have used it since it came out. Way more interested in this than teardowns.
this is the first user friendly tutorial of SPICE GUI I ever seen. thank you. please check also SimuLIDE which focused on simulating logic level stuff like timers, shift registers, microcontrollers.
Can't wait for more of these videos. I like tools that carter to the professional. Takes some effort to get started, but worth it because of all the features you can use later. Great video.
WELL DONE DAVE ! LTSpice is as close to an "Industry Standard" as one can get. Yes it is unduly complicated for many users but it is worth the extra time and effort to master it. Hope to see more videos on this program. Pour-it-on Dave !
Very good video Dave, thanks. I still have my Fortran card deck from my EE105 circuit analysis class. Boy have we come a long ways. Net lists are still usefull, great way to me sub circuits into LTspice. Again, thanks for the time and effort you put into all of your videos.
its available on TI's website for people interested. search TINA-TI should be #1 on the search. It also lets you import other manufacturers spice models which is nice.
Sometimes, as like as for my education, it comes bundled with some books. It lowers the price to about 60 Euros - but for educational purposes only. In the end, it still uses SPICE for its calculations, even though the interface is a lot more intuitive
Thanks Dave from France for this great vid! Any idea when you'll be able to make the next LTSPice tutorials? Anyway, keep this channel going, its awesome!
Agree that TI's TINA-TI freeware is pretty good. The single user TINA Design Suite is only $89 and when I bought it a few years ago it was on sale for $39.
I usually put all my resistance values in terms of kiloohms to avoid problems with units. Of course if it's anything less than 1000 ohms I'll just use regular ohms.
He said that LTSpice could not measure the equivalent resistance of that resistor puzzle he drew in the software, however it will measure the equivalent resistance if you know how to do that in the software. Just use Vin/Iin in the AC Analysis window set for Linear instead of Decibels.
The place I got trapped a lot in the early days was the default NMOS and PMOS models. On their own they don't behave like you'd expect of a discrete FET in a lot of circuits and it can take time to find the reason for your headaches until you pick a different model. I think because they simulate the physics of a die almost without parasitics. VDMOS seems to work much better in place of a discrete FET while being more ideal and faster to run than the FETs in the list.
Can this spice warn you if you exceed an LDO's short circuit output limitations? (Some specs day to use protection diodes to avoid problems with shorting the output, others don't have that requirement)
LTspice is one of the best SPICE simulators around. If you would be an analog engineer you would know that. What simulator do you think the guys at Linear Technology use?
LTSpice was developed inhouse because there were no spice simulators which would allow LTC to do an accurate and fast simulation of there Integrated circuits, especially the switching regulators! LTSpice has had a long and continuous development. It's Free and Very Good!
Begginers must pay attention what this guy says about the program at start of video, this is not a "breadboard simulator". It took me hours to figure out how to do a simple square wave function for testing. But I learned (while figuring that out), that it gives you a lot of control once you understand it. The interface is visualy poor (compared to other popular programs), you will not see any fancy 3d modeled knobs or sliders and VU meters... But still way better than using IBM paper punched cards.
+First Last Be sure to check the LT wiki. It has a LOT of resources ltwiki.org/?title=SPICE_and_LTspice_Courseware_and_Tutorials , not only tutorials but examples, 3rd party models and componenets and much more. You will notice a lot of unversities using LTspice, seems like a good instruction tool as long as guidence is provided together.
I would like to muck about with the LTSpice Model for LM3914, that IC, you used for the battery meter. It is not in the LTspice library. Where do I find the model and how do I get it into LTspice? Thank you. PS: I found something: easyeda.com/andyfierman/LM3914N_GW_spice_symbol_and_model_demo-6924dfd6c55049ca9c7eae1219aaa0c5 Can this somehow be used in LTspice? I am totally new to this so I have no idea.
I would like to muck about with the LTSpice Model for LM3914, that IC, you used for the battery meter. It is not in the LTspice library. Where do I find the model and how do I get it into LTspice? Thank you.
PS: I found something: easyeda.com/andyfierman/LM3914N_GW_spice_symbol_and_model_demo-6924dfd6c55049ca9c7eae1219aaa0c5 Can this somehow be used in LTspice? I am new to this so I have no idea.
Hi Dave. Love your videos and your way off speaking rigth out the box, no bulshitt. I have a reguest about importing a specific opamp to ltspice. I have for a while trying to import the opamp LM4562 into ltspice, but it seems that the pinlayout in the .lib file is not correct. Maybe you could make a small video, where you make that import, an a small circuit to make it work in ltspice. Best regards Michael from DK.
One of the reasons the LTspice is so rigid and difficult to use sometimes, is a result of the creator. I met the man during a seminar, brilliant guy, but one of the most rigid people I've met. What he says goes.
SPICE engine will make maths to retrieve values .. a resistor got two "internal pin names" lets say A & B and a value R .. so on the back ground the current displayed after calculations will be (VA - VB) / R ... if you swap/rotate the resistor so you swap the A and B .. SPICE engine will just scan point by point and make equations then solve them ! what you used to do on a sheet of paper .. it will just do it for you ;)
Yet another great video Dave. I have been a software engineer most of my career. I made a commitment to myself to become proficient in basic micro electronics by the end of 2015. The first three months have gone well. Have read a lot of books, watched hundreds of videos and have hacked many things around the house including doorbells, greenhouse ventilators, light/time automated switches, etc. Even bought a Rigol DS1054z. I tell my wife that your videos are my bridge drug to EE geekdom,
More tutorials on LTspice please
when u find the world of electronic simulation its amazing that they are close to reality and u dont have to do the real building over and over again to get a project done!! thumbs up!!!
Yes, you can download and import spice models. Component spice models can be as simple or as detailed as you like.
Use the Falstad circuit designer. It recognizes "M" as meg.
Thanks Dave, your enthusiasm makes the video so fun to watch. Great crash course for picking up LTSpice.
Hey man, your tutorial on LTspice is the most comprehensive tutorial I could find on this software! Thanks a lot for your help!
I love the videos you provide. I'm in my third year of Electrical Engineering and I watch your various videos on a daily basis. Keep em' coming.
Great introduction to LTSpice! Thanks for a little background history of the software and for demonstrating DC operating point analysis.
Where are the other ltspice tutorials? Good job, Dave, keep on! :-)
its just the algebraic sign convention used across the whole circuit. so if you were solving the problem on paper youd have to label the positive and negative side on the resistor. and based on that youll get a negative or positive current. and we assume that current flows from the positive side through the negative side of the resistor (or whatever convention you use) but if you get negative current it just means your initial direction of flow you picked is wrong and its flowing in the otherway
Great video. I've had the program for ages and never managed to get worthwhile results!
Time for another play. More please. Thanks for your time. Thumbs UP.
Bang on again Dave. You're fast becoming my go to lecturer.
Excellent tutorial Dave. I've used LTSpice quite a bit, but I've always rushed straight for the transient or AC simulation options. I will definitely be using the DC operating point simulation in the future. Thank you!
@MrMac5150, I am not sure Dave described that answer so well. Think about the resistor having a DC volt meter permanently connected to it, so while connecting the resistor in a certain orientation makes no difference to the actual circuit, it does make a difference to the reading in just the same way as measuring the voltage across the resistor with a DC voltmeter would be positive or negative depending on the way you place the meter probes.
Inside audio comunitty there's no one teaching.... the opposite...people use to hide their knowledge...i am the one goes against that and i use to teach all basics about audio amplifiers..including DC design..but i cannot go deep...i learned by myself...there's a lack of knowledge and you is the man that can fill this gap to these half million of souls around the whole world... i hope you understand this can be your destiny...to be this man
Thank You Gerry and all others, I get it now you explained it that way with the volt meter, depending where you take your measurements from. Cheers.
Looking forward to parts 2-10 of this series
Right??
Are you still looking?
@@thekaiser4333 I know I am
Thanks Dave! I've been using LTSpice for a little while now but I picked up a few tips. I say keep these coming!
I love you for posting this, Dave. LTSPICE is something I should've started learning about a year ago.
It's impressive how many people throw out nasty comments and suggestions to do this or that at their convenience. You gotta have a thick skin Dave. Keep up the good work.
You don't control the current flow, it's just that pin labels are fixed and depending upon which way around you put it, the calculation either comes out positive or negative. Current still flows the same way in the circuit.
Thanks for the tutorial Dave! I've struggled with LTSPICE in the past, but I believe it's never worth learning a dumbed-down tool just to learn more quickly - it takes longer in the end when you waste time re-learning the skill with the good tool later too...
Looks very good, although as you said, is complex to set up.
I'm now in love with "Circuit Wizard", which can show ALL specific voltages/currents among components, by simply hovering the mouse over wires/devices... in REAL TIME while running. APART from it's incredibly powerful "Auto-PCB" creation !!
It knows the dimensions of all the components including terminals & relays etc., for single or dual sided boards, and designs the whole PCB without crossovers. You can manually intervene, and change what ever you want.....
Thanks Mate!! I'm a total newb at electronics. I actually came here hoping to find an easier way to just look at how to find voltage bias with LTSPICE, I started with 5SPice and it is easier in that regard. What I found instead was that I wasn't valuing my resistors properly. m versus Meg!! What a simple thing and now my circuit finally works. Argggggg.
Looking forward for the next tutorial. When is it coming out. Thank for the great work by the way!!!
The best LT Spice tutorial I've seen.
Hi Dave. Good video. Only wish you done more of those. Like , how to add an external spice model ( just like you are suggesting in this video) . I’m just getting started with Spice and so far you are the best out there at explaining for beginners.
I know unix spice from my EE time, as we use it in our laboratory class. But that time spice did not have a GUI....as you said one have to feed a ascii file (the nodelist) into it.
Thanx for this LTspice tutorial!! :)
Excellent Dave! Finally! Yeah, there are some LTSpice tutorials out there, but it is all a bit catch as catch can. Hopefully you can correct all that with a methodical series that goes beyond those and the surface. Price is right, powerful, flexible -but no fluff. Have used it since it came out. Way more interested in this than teardowns.
this is the first user friendly tutorial of SPICE GUI I ever seen. thank you.
please check also SimuLIDE which focused on simulating logic level stuff like timers, shift registers, microcontrollers.
This is like finding GOLD for beginner. Great work explaining.
Can't wait for more of these videos. I like tools that carter to the professional. Takes some effort to get started, but worth it because of all the features you can use later. Great video.
Please upload more LT SPICE tutorials!
WELL DONE DAVE !
LTSpice is as close to an "Industry Standard" as one can get. Yes it is unduly complicated for many users but it is worth the extra time and effort to master it. Hope to see more videos on this program.
Pour-it-on Dave !
I'm a big fan of MultiSim. Fairly straight forward to use...Yes it's expensive, but so was Altium and I love it too...
thanks for choosing LTspice! i'm still wrapping my brain around tube models! cheers!
Very good video Dave, thanks. I still have my Fortran card deck from my EE105 circuit analysis class. Boy have we come a long ways. Net lists are still usefull, great way to me sub circuits into LTspice. Again, thanks for the time and effort you put into all of your videos.
its available on TI's website for people interested. search TINA-TI should be #1 on the search. It also lets you import other manufacturers spice models which is nice.
Thanks - it was exactely what I was looking for. Great explanation.
Thanks!! Excellent video. Looking forward to more spice tutorials. Keep up the great work.
Fesz electronics has some very good LTspice tutorials on his channel.
yess
Sometimes, as like as for my education, it comes bundled with some books. It lowers the price to about 60 Euros - but for educational purposes only.
In the end, it still uses SPICE for its calculations, even though the interface is a lot more intuitive
Thanks Dave from France for this great vid! Any idea when you'll be able to make the next LTSPice tutorials? Anyway, keep this channel going, its awesome!
Agree that TI's TINA-TI freeware is pretty good. The single user TINA Design Suite is only $89 and when I bought it a few years ago it was on sale for $39.
Dude this is great, thank you for doing a simple beginners video.
Enough the get the idea of how it works and explore :)
I appreciate this video on LTSpice. More please!
Thank you Dave, keep making tutorials!
TINA-TI is also a good free tool.. Between LTSpice and TINA you usually can get whatever simple simulation you need done.
I use Paul Falstad's java circuit simulator. Really easy to use, and great for most basic circuits
More, Dave! MORE!
Perfect intro to LTSpice Dave...nice one.
I think the tool, and the video is awesome... and both are free, which is a big thumbs-up ;) Thanks Dave!
I usually put all my resistance values in terms of kiloohms to avoid problems with units.
Of course if it's anything less than 1000 ohms I'll just use regular ohms.
LTspice is one of the most easy-to-use programs I know of. How dumbed-down have programs to be that people like you are satisfied?
Awesome tutorial. More please.
He said that LTSpice could not measure the equivalent resistance of that resistor puzzle he drew in the software, however it will measure the equivalent resistance if you know how to do that in the software. Just use Vin/Iin in the AC Analysis window set for Linear instead of Decibels.
The place I got trapped a lot in the early days was the default NMOS and PMOS models. On their own they don't behave like you'd expect of a discrete FET in a lot of circuits and it can take time to find the reason for your headaches until you pick a different model. I think because they simulate the physics of a die almost without parasitics. VDMOS seems to work much better in place of a discrete FET while being more ideal and faster to run than the FETs in the list.
Can this spice warn you if you exceed an LDO's short circuit output limitations? (Some specs day to use protection diodes to avoid problems with shorting the output, others don't have that requirement)
Thank you Dave! Explained really well!
Yes! Please more videos like this ... LTSpice confuses the hell out of me!
Samson C01U USB studio mic
Current flows from the higher voltage to the lower voltage. If you reverse the voltages the current will flow the other way...
Why would I do a tutorial for a commercial product that costs thousands of dollars?
How much does Multisim cost?
very informative.....waiting for more....may be some more tips on fundamental fridays
Thank you so much. This is invaluable! If I'd watched this 1 year ago, I'd still have hair on my head.
LTspice is one of the best SPICE simulators around. If you would be an analog engineer you would know that. What simulator do you think the guys at Linear Technology use?
where are the rest of the tutorial videos? can't seem to find them
Finally a LT spice tutorial.
Hey, Dave, give the QUCS a try. It's an open source circuit simulator, it's tiny and it's not based on SPICE.
Have you tried QUCS? It's small, open source and independent of spice. It's pretty too!
Keep these tutorials up :)
LTSpice was developed inhouse because there were no spice simulators which would allow LTC to do an accurate and fast simulation of there Integrated circuits, especially the switching regulators!
LTSpice has had a long and continuous development. It's Free and Very Good!
Video was amazing, can anyone describe why was this done and what the title is please?
hahah lol
Why would I review a product that has not been sold, updated, or supported in over decade?
Hi Dave, there has been an update, I'd like to know what you think of it?
It can. Just put 1V supply across it and measure the current flowing. R=V/I
Begginers must pay attention what this guy says about the program at start of video, this is not a "breadboard simulator". It took me hours to figure out how to do a simple square wave function for testing. But I learned (while figuring that out), that it gives you a lot of control once you understand it. The interface is visualy poor (compared to other popular programs), you will not see any fancy 3d modeled knobs or sliders and VU meters... But still way better than using IBM paper punched cards.
+First Last Be sure to check the LT wiki. It has a LOT of resources ltwiki.org/?title=SPICE_and_LTspice_Courseware_and_Tutorials , not only tutorials but examples, 3rd party models and componenets and much more. You will notice a lot of unversities using LTspice, seems like a good instruction tool as long as guidence is provided together.
Useful tutorial, and quite easy to understand. Thanks Dave :)
I would like to muck about with the LTSpice Model for LM3914, that IC, you used for the battery meter.
It is not in the LTspice library. Where do I find the model and how do I get it into LTspice?
Thank you.
PS: I found something:
easyeda.com/andyfierman/LM3914N_GW_spice_symbol_and_model_demo-6924dfd6c55049ca9c7eae1219aaa0c5
Can this somehow be used in LTspice? I am totally new to this so I have no idea.
Excellent video. Thanks.
My uni oughta pay you... they sent a link to your video to teach us this
20:02 or you can apply ohm's law. 385.723 uA * 1k = 385.723 mV. LTSPICE is built in a way that you already passed the basics such as this thing
Where are your seperate tutorials? :D
thanks dave. ripper video once again.
Haven't tried that one yet.
I would like to muck about with the LTSpice Model for LM3914, that IC, you used for the battery meter.
It is not in the LTspice library. Where do I find the model and how do I get it into LTspice?
Thank you.
PS: I found something:
easyeda.com/andyfierman/LM3914N_GW_spice_symbol_and_model_demo-6924dfd6c55049ca9c7eae1219aaa0c5
Can this somehow be used in LTspice? I am new to this so I have no idea.
Hi Dave. Love your videos and your way off speaking rigth out the box, no bulshitt.
I have a reguest about importing a specific opamp to ltspice. I have for a while trying to import the opamp LM4562 into ltspice, but it seems that the pinlayout in the .lib file is not correct. Maybe you could make a small video, where you make that import, an a small circuit to make it work in ltspice. Best regards Michael from DK.
LTSpice is a pain sometimes with the failure to converge, especially when using transistors in unconventional ways.
One of the reasons the LTspice is so rigid and difficult to use sometimes, is a result of the creator. I met the man during a seminar, brilliant guy, but one of the most rigid people I've met. What he says goes.
Just what I needed, thanks for the tutorial!
It is the way the software was designed. Dave talk about that early on.
Just double checked. For base version it's: € 1,560 For full it's €2,720
Your video is very educating, can you do a video on full wave rectifier using LTspice,please.
We used TINA already back in 1991 in scool,
it is easy to use
And TINA has very nice graphical analysis functions
Resistors are not directional, right?
You can use an old Eval Version MicroSim EVAL 8:
Download "www_tietze-schenk.de/ts_data_a14.exe"
from Tietze Schenk Website
Yet another enjoyable video. I'm hooked. :)
tutorial was very helpful, thank you !
Give us more, fantastic!
a nice intro to LTspice, I found 3 more in the archive, are there any more planned??
Love this!
SPICE engine will make maths to retrieve values .. a resistor got two "internal pin names" lets say A & B and a value R .. so on the back ground the current displayed after calculations will be (VA - VB) / R ... if you swap/rotate the resistor so you swap the A and B .. SPICE engine will just scan point by point and make equations then solve them ! what you used to do on a sheet of paper .. it will just do it for you ;)