Comments on: 555 Audio modulated flyback

By: Дмитрий

Дмитрий — Mon, 30 Jan 2012 14:23:48 +0000

Круто конечно но с динамиками не сравнится. По сей день круче их ничего ещё не видел и не слышал.

By: high1voltage1rules

high1voltage1rules — Sun, 22 Jan 2012 00:09:38 +0000

Awsome circuit. Thanx for sharing. Will build and enjoy!

By: Mads Barnkob

Mads Barnkob — Sat, 07 Jan 2012 19:59:19 +0000

Hey ebenvios

Would you like to tell me what to describe in more details? I do not see the same missing as you do, so it would be nice if you could tell me what to improve

Kind regards
Mads

By: ebenvios

ebenvios — Sat, 07 Jan 2012 18:01:56 +0000

I do trust all of the ideas you have offered on your post. They are very convincing and can definitely work. Still, the posts are very quick for beginners. May you please extend them a bit from next time? Thank you for the post.

By: Alex

Alex — Wed, 09 Nov 2011 22:05:15 +0000

@Mads in reply to the comment you posted to me, I agree. This circuit is a great way to learn the basics of the 555 timer and pulse width modulation, I certainly did learn allot from this circuit and your website in particular has been a great help for me in learning how these circuits operate.

It doesn’t matter if this circuit breaks easily as I think the knowledge learnt by building and learning how to tweak it is worth allot more! (The high voltage is a plus lol).

But anyhow I will be sure to post my results with the SG3525AN MOSFET driver once I find a cheap place to source it (probably ebay) and finish my current projects (Motors).

Alex.

By: Alex

Alex — Tue, 08 Nov 2011 17:04:12 +0000

Hi Josiah,

What MOSFET are you using?

By: Mads Barnkob

Mads Barnkob — Tue, 01 Nov 2011 08:28:10 +0000

Hey Josiah

Its highest likely because the 555 can not supply enough current to drive the MOSFET, so it is outputting all the current it can, thus it heats up.

Look into using the 555 to drive a transistor stage that drives the MOSFET, this will ease on the stress and have the 555 and MOSFET run much cooler.

Kind regards
Mads

By: Josiah

Josiah — Tue, 01 Nov 2011 05:34:30 +0000

I have constructed the circuit though my 555 timer is heating up, I am using a 12v 400 mA supply, I am hesitant of hooking it up to a 2 amp supply if it is already heating up the 555 timer. Now does the MOSFET need a 2 amp power supply, And I can’t see why the 555 timer is heating up.

By: Mads Barnkob

Mads Barnkob — Thu, 27 Oct 2011 16:46:45 +0000

Alex, you are on the right track.

This is really only a simple beginners circuit, moving on and designing from scratch when you have learned the basics from this circuit is something that warms my heart

Kind regards
Mads

By: Alex

Alex — Thu, 27 Oct 2011 12:38:03 +0000

@High voltage Strangely, when I first made my circuit it worked fine for a long while but now it is basically a MOSFET and 555 chip killer and doesn’t last long at all before something goes pop.

Like you I also checked the capacitors and resistors/pots and they all checked fine and there are no shorts anywhere. I am going to try making a more advanced version soon using the SG3525AN chip.