another dream project is a inverter to power my house. starting with the boost stage. 24v and about 5 kW pure sine wave. I found a driver for the output. but required high voltage DC 170v +/-, to get 120vac. but a high voltage and current boost . isn't quite that easy. hope you and your family have a great thanksgiving!!!
Hey ove got a buck converter that has an input voltage of 13 volts but my buck converter only outputs around 4 volts when maxed out and will go to 1 volt when turned all the way down . It used to be able to be able to have the output damb near match the input voltage but no longer does and maxes out at around 4 volts. Is my pot to blame
Inductor size is extremely important! In fact, the value of every component , the switching frequency, the input and output voltage, and the loading are all extremely important to proper operation. You generally can't expect to throw together parts and expect it to work.
dwpetty3723 that's the thing about switching power supplies.... Because the current is just interrupted to reduce voltage instead of drawn off by a resistor like a voltage bridge, they are very efficient. Nothing is wasted to reduce the voltage, but the drawback is they are more noisy. So devices may still use both a buck converter for most of the voltage reduction and then a linear regulator (like a LDO) which will waste a little bit of power but ensure less noise and more even voltage under load.
Everywhere you need a power source of lower voltage than your other (available) power supply puts out...As an example, I have a 24V psu, but I need a 5V one. This is easy to implement by a buck converter.
Hicham Bougaa a buck converter decreases voltage and increases amperage. so the maximum current would be a function of input versus output. but if you want to talk about maximum current by component, the 1N4007 diode has the lowest rating at 3A.
another dream project is a inverter to power my house. starting with the boost stage. 24v and about 5 kW pure sine wave. I found a driver for the output. but required high voltage DC 170v +/-, to get 120vac. but a high voltage and current boost . isn't quite that easy. hope you and your family have a great thanksgiving!!!
How did it go?
Hey ove got a buck converter that has an input voltage of 13 volts but my buck converter only outputs around 4 volts when maxed out and will go to 1 volt when turned all the way down . It used to be able to be able to have the output damb near match the input voltage but no longer does and maxes out at around 4 volts. Is my pot to blame
How can you drive the mosfet gate with Vg = 12V, while it must be >=22, can you explain that for me pls?
Mosfets Gates must be driven by a voltage around 10-20v, 12v is a safe voltage, 22v is too much and probably would damage the mosfet gate
@@VictorC173 the mosfet is being used in the high side so it needs bootstrapping to fully turn on
Which capacitors you used. There are 2 of them
How much is the pulldown resistor value?
How did you charge pump the gate of the n channel mosfet?
Is that MOSFET gets hot ? With or without load? I gonna make that to connect a solar panel to charge my 18650's lithium batteries.
It shouldn't. The voltage drop across it is pretty low, most of the drop is across the load. If you short the load....yeah I think so.
Is there a way that I can input an voltage at around 42V and buck it down to around 19V or will it just fry the converter?
really helpful I did my project thanks to this video
What is the value of Resistor used for the gate ?
Thank you.
Could you please add a feedback circuit to get a stabilized output?
Yeah and wouldn't mind it including an OC for circuit isolation as well.
Does this only make a difference when using higher voltage like 12v or above as I did it on 5v and I could only get it down to about 3v?
Shouldn't that be an p-channel mosfet?
Hey thanks for the info. What was the value of that potentiometer? Was it 10k?
Another Great video!! Thanks or sharing.
How can we define value of pull down resistor of MOSFET?
68u farad or 68 pico farad please clarify
Microfarad...
If you can do this why not go 50A?
Do you have a circuit diagram for it?
The circuit diagram is so simple we don't need that but you can find that on google 'buck converter using 555'.
He doesn't include the charge pump to drive n channel gate
Thank you 👍👍👍👍
Thank you, tried it out but didn't work! Keep getting like 0.01 v across load! Maybe inductor size is important?
Inductor size is extremely important! In fact, the value of every component , the switching frequency, the input and output voltage, and the loading are all extremely important to proper operation. You generally can't expect to throw together parts and expect it to work.
Why would it not be important?
Where is the circuit diagram?
Please explain procedure components
nicely done, does the components get very hot bringing down the voltage?
dwpetty3723 nothing here was warmer than room temperature
dwpetty3723 that's the thing about switching power supplies.... Because the current is just interrupted to reduce voltage instead of drawn off by a resistor like a voltage bridge, they are very efficient. Nothing is wasted to reduce the voltage, but the drawback is they are more noisy. So devices may still use both a buck converter for most of the voltage reduction and then a linear regulator (like a LDO) which will waste a little bit of power but ensure less noise and more even voltage under load.
Please I didn't get where preset will go, can I get the diagram .thanks
+Adeyemi Oladayo preset? I don't know what you mean?
@@learnelectronics he meant a varistor/pot
Can you please say the capacitor value again
Where would you use a Buck Converter?
Everywhere you need a power source of lower voltage than your other (available) power supply puts out...As an example, I have a 24V psu, but I need a 5V one. This is easy to implement by a buck converter.
Your an awesome teacher, the australian dude is fired.
+Jason Burt haha thanks
Why not just use a LDO regulator instead of this circuit?
A 7805 would generate a lot of heat via a heat sink if the desired voltage was 5v. They are inefficient for this spread.
could you tell me is that NE555 or TCL555?
Ne555
as i know, ic555 can't create duty cycle < 50% so could you explain for me why the output voltage can go down to 5V?
@@nguyeninhkhanh9020 it can go below 50%, he has wired the timer to increase the discharge compared to the charge rate. Clever setup really :)
Very interesting
what is that connected below the timer ic?????
I meant the variable resistor its value and other resistors
Plug it into a wall outlet then I am impressed
There's no rectifier, so..
next a buck-boost? :D
fredlllll maybe, I was thinking a SEPIC😀
looking forward to it
Have you got a patreon? ( I don't do ads)
don g no, no Patreon. I appreciate you wanting to support the channel though. that means a lot.
950kHz it is so much for 555
exactly. And not practical for a buck. A lot of switching losses.
the max courant //A//// what*********
Hicham Bougaa a buck converter decreases voltage and increases amperage. so the maximum current would be a function of input versus output. but if you want to talk about maximum current by component, the 1N4007 diode has the lowest rating at 3A.
squematic ?!!! brasil
do you have a circuit diagram for it?