Why would you do something as silly as this? Didn't you hear about ADJUSTABLE regulators like LM317?
If you insist on using FIXED voltage regulators, and you're only going to use one of those at a time at high current or all of those but at low currents, chain them so that the input of one comes from the output of the other, like 7812 - 7815-7812-7809 .. etc
This way each regulator is only going to dissipate the difference between input voltage and output voltage or about 3v times the current, instead of each regulator dissipating (20v+ - output voltage) x current ...saying 20v because you need 20v or more to get 18v from the 7818 regulator.
Even you're 11 years old, just simple question that I think you understand, what is the purpose of this thread ? Asking for feedback ? brag on your design ? or what ?
it it much uses Voltage Regulators Wich gonna get heated very quickly
I did you a favor, reported this thread to mods to move it into Beginner section, before the mob eats you alive there.
well like i dont know how to make 7 segment display work to add into this psu
well like i dont know how to make 7 segment display work to add into this psu
Even you're 11 years old, just simple question that I think you understand, what is the purpose of this thread ? Asking for feedback ? brag on your design ? or what ?
i am asking because of Some help more ideas to add
Even you're 11 years old, just simple question that I think you understand, what is the purpose of this thread ? Asking for feedback ? brag on your design ? or what ?
i am asking because of Some help more ideas to add
Well, I congratulate you for getting started in electronics at your age.
When I was about your age (10~11) I built my first "circuit": a full bridge rectifier out of 4 diodes salvaged from scrap TV and radios at my grandmother's house in order to make a DC motor run from my bicycle Bottle Dynamo which outputted 6V AC, as I was fed up of disposable batteries and had no AC/DC transformer.
Only thing I had at the time was a single old electronics book at the town library to learn from. Internet had reached my country 2 years earlier but just for universities and research institutions.
Now you have the web and a vibrant community to get you started.
Are you playing with hardware or just simulations?
i am asking because of Some help more ideas to add
Helloi am asking because of Some help more ideas to add
Do you mean in terms of improving the circuit while keeping the features that you have, or do you want to add more features?
In any case, a couple on comments on the software: First, just because it works in software does not mean that it works with real parts. This is something to watch out for. That being said, simulation is a handy tool for debugging and design if used properly. But building the real circuit and probing around is much more fun .
Are you planning to build the circuit up with parts and probe around? Because if that is the case, a variable regulator is worth looking into. I would not get restricted by the parts a simulator offers if your goal is to design real hardware.
Some comments on the circuit: For all the parts you are designing into the circuit, go online and read the datasheet. You will learn a lot by doing so, both in terms of how to use the part as well as in understanding how the parts work internally. That way, you would for example see that the regulators should be decoupled with capacitors under some conditions.
Also, because you have an inductive load (a motor), it might be wise to bypass the regulators with a diode. These regulators typically don't like it if you apply -- due to the inductive kickback -- an output voltage higher than the input. Make sure that the voltage fed by CN1 is high enough for even the 8V regulator to maintain regulation. (Just out of curiosity, what does this circuit wizard simulator do as you ramp down the input voltage from 10V to, say, 7V?)
You should also decouple the display driver under some conditions, check the datasheet. I didn't fully understand what that display is doing, though. At first I thought you were monitoring the current, but that display is kind of standalone, fed by a signal source. What's the purpose of this? Can you feed this portion of the circuit from the 8V regulator you already have or do you really need a dedicated regulator for that?
In case you want to add more features, I would look for current monitoring and limiting, variable voltage (if you want that), or making the supply more rugged against abuse.
Also don't feel bad if people seem to be a little harsh. Doing this kind of stuff at 11 years is great!
Regards
Matt
Helloi am asking because of Some help more ideas to add
Do you mean in terms of improving the circuit while keeping the features that you have, or do you want to add more features?
In any case, a couple on comments on the software: First, just because it works in software does not mean that it works with real parts. This is something to watch out for. That being said, simulation is a handy tool for debugging and design if used properly. But building the real circuit and probing around is much more fun .
Are you planning to build the circuit up with parts and probe around? Because if that is the case, a variable regulator is worth looking into. I would not get restricted by the parts a simulator offers if your goal is to design real hardware.
Some comments on the circuit: For all the parts you are designing into the circuit, go online and read the datasheet. You will learn a lot by doing so, both in terms of how to use the part as well as in understanding how the parts work internally. That way, you would for example see that the regulators should be decoupled with capacitors under some conditions.
Also, because you have an inductive load (a motor), it might be wise to bypass the regulators with a diode. These regulators typically don't like it if you apply -- due to the inductive kickback -- an output voltage higher than the input. Make sure that the voltage fed by CN1 is high enough for even the 8V regulator to maintain regulation. (Just out of curiosity, what does this circuit wizard simulator do as you ramp down the input voltage from 10V to, say, 7V?)
You should also decouple the display driver under some conditions, check the datasheet. I didn't fully understand what that display is doing, though. At first I thought you were monitoring the current, but that display is kind of standalone, fed by a signal source. What's the purpose of this? Can you feed this portion of the circuit from the 8V regulator you already have or do you really need a dedicated regulator for that?
In case you want to add more features, I would look for current monitoring and limiting, variable voltage (if you want that), or making the supply more rugged against abuse.
Also don't feel bad if people seem to be a little harsh. Doing this kind of stuff at 11 years is great!
Regards
Matthello matt i wanted to add pontentiometer and Display for voltage
Helloi am asking because of Some help more ideas to add
Do you mean in terms of improving the circuit while keeping the features that you have, or do you want to add more features?
In any case, a couple on comments on the software: First, just because it works in software does not mean that it works with real parts. This is something to watch out for. That being said, simulation is a handy tool for debugging and design if used properly. But building the real circuit and probing around is much more fun .
Are you planning to build the circuit up with parts and probe around? Because if that is the case, a variable regulator is worth looking into. I would not get restricted by the parts a simulator offers if your goal is to design real hardware.
Some comments on the circuit: For all the parts you are designing into the circuit, go online and read the datasheet. You will learn a lot by doing so, both in terms of how to use the part as well as in understanding how the parts work internally. That way, you would for example see that the regulators should be decoupled with capacitors under some conditions.
Also, because you have an inductive load (a motor), it might be wise to bypass the regulators with a diode. These regulators typically don't like it if you apply -- due to the inductive kickback -- an output voltage higher than the input. Make sure that the voltage fed by CN1 is high enough for even the 8V regulator to maintain regulation. (Just out of curiosity, what does this circuit wizard simulator do as you ramp down the input voltage from 10V to, say, 7V?)
You should also decouple the display driver under some conditions, check the datasheet. I didn't fully understand what that display is doing, though. At first I thought you were monitoring the current, but that display is kind of standalone, fed by a signal source. What's the purpose of this? Can you feed this portion of the circuit from the 8V regulator you already have or do you really need a dedicated regulator for that?
In case you want to add more features, I would look for current monitoring and limiting, variable voltage (if you want that), or making the supply more rugged against abuse.
Also don't feel bad if people seem to be a little harsh. Doing this kind of stuff at 11 years is great!
Regards
Matthello matt i wanted to add pontentiometer and Display for voltage
Potentiometer for...? Controlling the output voltage?
If so, you can do that with an LM317. Google it and read the datasheet, it'll show you how to wire it up.
hello matt i wanted to add pontentiometer and Display for voltage
hello matt i wanted to add pontentiometer and Display for voltage
Cool. Does that mean that you want to convert the "knobless" supply into something that has a variable voltage, set by the potentiometer? If so you have a couple of options. The first one is to use a variable regulator, but your simulator does not provide such a part. If you really want to simulate it, you could also build the regulator from discrete parts but I don't suggest doing that at this stage. There is another trick which allows you to boost the output voltage of a 7805 higher than 5 V: http://www.electronicsforu.com/electronicsforu/circuitarchives/view_article.asp?sno=203&article_type=1&id=387&tt=unhot
Then you somehow have to pick up the output voltage and display it on the bar display. For testing, I would advise you to develop both of these things separately. That means you develop the supply with variable output as one "project" and the voltage-display as another one. For that you can use a potentiometer for testing. When both work you merge the two.
Which one would you like to go for first?
Regards
Matt
no my software has Variable Resistor