Gentlemen, Over the years, I have found that there is one circuit fragment above all others that I go back to repeatedly, and that is the PWM controller in all its guises. I have made more of these than any other electronic sub-circuit over the last 50 years and they come in handy for all manner of different applications. I'm just curious to know what others here find themselves going back to repeatedly over the years and would welcome responses from sed contributors north of the Tropic of Capricorn in this regard. Cheers, CD.
Go To Circuits
Started by ●March 5, 2023
Reply by ●March 5, 20232023-03-05
On 2023-03-05 12:51, Cursitor Doom wrote:> Gentlemen, > > Over the years, I have found that there is one circuit fragment above > all others that I go back to repeatedly, and that is the PWM > controller in all its guises. I have made more of these than any other > electronic sub-circuit over the last 50 years and they come in handy > for all manner of different applications. > I'm just curious to know what others here find themselves going back > to repeatedly over the years and would welcome responses from sed > contributors north of the Tropic of Capricorn in this regard. > > Cheers, > > CD. >Bootstraps, superhets of one sort or another, noise cancellers, cap multipliers, AC-coupled feedback loops, and a cast of thousands. ;) Cheers Phil Hobbs -- Dr Philip C D Hobbs Principal Consultant ElectroOptical Innovations LLC / Hobbs ElectroOptics Optics, Electro-optics, Photonics, Analog Electronics Briarcliff Manor NY 10510 http://electrooptical.net http://hobbs-eo.com
Reply by ●March 5, 20232023-03-05
On Sun, 05 Mar 2023 17:51:45 +0000, Cursitor Doom <cd@notformail.com> wrote:>Gentlemen, > >Over the years, I have found that there is one circuit fragment above >all others that I go back to repeatedly, and that is the PWM >controller in all its guises. I have made more of these than any other >electronic sub-circuit over the last 50 years and they come in handy >for all manner of different applications. >I'm just curious to know what others here find themselves going back >to repeatedly over the years and would welcome responses from sed >contributors north of the Tropic of Capricorn in this regard. > >Cheers, > >CD.Linear ramp plus comparator time delay. Triggered LC oscillator with optional phase lock. Delay-and-width pulse generator, top secret. GaN based pin driver, ditto. Power mosfet boosted opamp. Switchmode power amp LT3803 based switchers, sepic and flyback Opamps as voltage regulators Sallen-Key lowpass filter 3-pole LC lowpass filter, critically damped I've done a lot of PWM, but it's mostly generated digitally lately. Here's an analog PWM generator: https://www.dropbox.com/s/3j6n35krzxwo73n/23S902B_1_2.pdf?dl=0 How do you usually generate PWM?
Reply by ●March 5, 20232023-03-05
On Sunday, March 5, 2023 at 12:51:54 PM UTC-5, Cursitor Doom wrote:> Gentlemen, > > Over the years, I have found that there is one circuit fragment above > all others that I go back to repeatedly, and that is the PWM > controller in all its guises. I have made more of these than any other > electronic sub-circuit over the last 50 years and they come in handy > for all manner of different applications. > I'm just curious to know what others here find themselves going back > to repeatedly over the years and would welcome responses from sed > contributors north of the Tropic of Capricorn in this regard.I would steer clear of that noisy thing unless its absolutely necessary.> > Cheers, > > CD.
Reply by ●March 5, 20232023-03-05
On Sunday, March 5, 2023 at 2:25:57 PM UTC-5, John Larkin wrote:> On Sun, 05 Mar 2023 17:51:45 +0000, Cursitor Doom <c...@notformail.com> > wrote: > >Gentlemen, > > > >Over the years, I have found that there is one circuit fragment above > >all others that I go back to repeatedly, and that is the PWM > >controller in all its guises. I have made more of these than any other > >electronic sub-circuit over the last 50 years and they come in handy > >for all manner of different applications. > >I'm just curious to know what others here find themselves going back > >to repeatedly over the years and would welcome responses from sed > >contributors north of the Tropic of Capricorn in this regard. > > > >Cheers, > > > >CD. > Linear ramp plus comparator time delay. > > Triggered LC oscillator with optional phase lock. > > Delay-and-width pulse generator, top secret. > > GaN based pin driver, ditto. > > Power mosfet boosted opamp. > > Switchmode power amp > > LT3803 based switchers, sepic and flyback > > Opamps as voltage regulators > > Sallen-Key lowpass filter > > 3-pole LC lowpass filter, critically damped > > > > I've done a lot of PWM, but it's mostly generated digitally lately. > > Here's an analog PWM generator: > > https://www.dropbox.com/s/3j6n35krzxwo73n/23S902B_1_2.pdf?dl=0That's some 1970s-ish electronics for you.> > > How do you usually generate PWM?
Reply by ●March 5, 20232023-03-05
On Sun, 5 Mar 2023 13:01:12 -0800 (PST), Fred Bloggs <bloggs.fredbloggs.fred@gmail.com> wrote:>On Sunday, March 5, 2023 at 2:25:57?PM UTC-5, John Larkin wrote: >> On Sun, 05 Mar 2023 17:51:45 +0000, Cursitor Doom <c...@notformail.com> >> wrote: >> >Gentlemen, >> > >> >Over the years, I have found that there is one circuit fragment above >> >all others that I go back to repeatedly, and that is the PWM >> >controller in all its guises. I have made more of these than any other >> >electronic sub-circuit over the last 50 years and they come in handy >> >for all manner of different applications. >> >I'm just curious to know what others here find themselves going back >> >to repeatedly over the years and would welcome responses from sed >> >contributors north of the Tropic of Capricorn in this regard. >> > >> >Cheers, >> > >> >CD. >> Linear ramp plus comparator time delay. >> >> Triggered LC oscillator with optional phase lock. >> >> Delay-and-width pulse generator, top secret. >> >> GaN based pin driver, ditto. >> >> Power mosfet boosted opamp. >> >> Switchmode power amp >> >> LT3803 based switchers, sepic and flyback >> >> Opamps as voltage regulators >> >> Sallen-Key lowpass filter >> >> 3-pole LC lowpass filter, critically damped >> >> >> >> I've done a lot of PWM, but it's mostly generated digitally lately. >> >> Here's an analog PWM generator: >> >> https://www.dropbox.com/s/3j6n35krzxwo73n/23S902B_1_2.pdf?dl=0 > >That's some 1970s-ish electronics for you. >It's part of a PM alternator simulator. Should I tell people to stop buying them?
Reply by ●March 5, 20232023-03-05
On Sunday, March 5, 2023 at 4:08:42 PM UTC-5, John Larkin wrote:> On Sun, 5 Mar 2023 13:01:12 -0800 (PST), Fred Bloggs > <bloggs.fred...@gmail.com> wrote: > >On Sunday, March 5, 2023 at 2:25:57?PM UTC-5, John Larkin wrote: > >> On Sun, 05 Mar 2023 17:51:45 +0000, Cursitor Doom <c...@notformail.com> > >> wrote: > >> >Gentlemen, > >> > > >> >Over the years, I have found that there is one circuit fragment above > >> >all others that I go back to repeatedly, and that is the PWM > >> >controller in all its guises. I have made more of these than any other > >> >electronic sub-circuit over the last 50 years and they come in handy > >> >for all manner of different applications. > >> >I'm just curious to know what others here find themselves going back > >> >to repeatedly over the years and would welcome responses from sed > >> >contributors north of the Tropic of Capricorn in this regard. > >> > > >> >Cheers, > >> > > >> >CD. > >> Linear ramp plus comparator time delay. > >> > >> Triggered LC oscillator with optional phase lock. > >> > >> Delay-and-width pulse generator, top secret. > >> > >> GaN based pin driver, ditto. > >> > >> Power mosfet boosted opamp. > >> > >> Switchmode power amp > >> > >> LT3803 based switchers, sepic and flyback > >> > >> Opamps as voltage regulators > >> > >> Sallen-Key lowpass filter > >> > >> 3-pole LC lowpass filter, critically damped > >> > >> > >> > >> I've done a lot of PWM, but it's mostly generated digitally lately. > >> > >> Here's an analog PWM generator: > >> > >> https://www.dropbox.com/s/3j6n35krzxwo73n/23S902B_1_2.pdf?dl=0 > > > >That's some 1970s-ish electronics for you. > > > It's part of a PM alternator simulator. Should I tell people to stop > buying them?Not all, it's an excellent circuit. In the decorative arts community it would be called "timeless"- meaning it never goes out of style.
Reply by ●March 5, 20232023-03-05
On Sun, 5 Mar 2023 13:22:52 -0800 (PST), Fred Bloggs <bloggs.fredbloggs.fred@gmail.com> wrote:>On Sunday, March 5, 2023 at 4:08:42?PM UTC-5, John Larkin wrote: >> On Sun, 5 Mar 2023 13:01:12 -0800 (PST), Fred Bloggs >> <bloggs.fred...@gmail.com> wrote: >> >On Sunday, March 5, 2023 at 2:25:57?PM UTC-5, John Larkin wrote: >> >> On Sun, 05 Mar 2023 17:51:45 +0000, Cursitor Doom <c...@notformail.com> >> >> wrote: >> >> >Gentlemen, >> >> > >> >> >Over the years, I have found that there is one circuit fragment above >> >> >all others that I go back to repeatedly, and that is the PWM >> >> >controller in all its guises. I have made more of these than any other >> >> >electronic sub-circuit over the last 50 years and they come in handy >> >> >for all manner of different applications. >> >> >I'm just curious to know what others here find themselves going back >> >> >to repeatedly over the years and would welcome responses from sed >> >> >contributors north of the Tropic of Capricorn in this regard. >> >> > >> >> >Cheers, >> >> > >> >> >CD. >> >> Linear ramp plus comparator time delay. >> >> >> >> Triggered LC oscillator with optional phase lock. >> >> >> >> Delay-and-width pulse generator, top secret. >> >> >> >> GaN based pin driver, ditto. >> >> >> >> Power mosfet boosted opamp. >> >> >> >> Switchmode power amp >> >> >> >> LT3803 based switchers, sepic and flyback >> >> >> >> Opamps as voltage regulators >> >> >> >> Sallen-Key lowpass filter >> >> >> >> 3-pole LC lowpass filter, critically damped >> >> >> >> >> >> >> >> I've done a lot of PWM, but it's mostly generated digitally lately. >> >> >> >> Here's an analog PWM generator: >> >> >> >> https://www.dropbox.com/s/3j6n35krzxwo73n/23S902B_1_2.pdf?dl=0 >> > >> >That's some 1970s-ish electronics for you. >> > >> It's part of a PM alternator simulator. Should I tell people to stop >> buying them? > >Not all, it's an excellent circuit. In the decorative arts community it would be called "timeless"- meaning it never goes out of style.That's rev B of the class-D amp. The first pass used a TI audio amp chip, TPA3255, but it had a suicide wish. The gigantic discrete mosfets are apparently indestructable. Here's the box. There are three of the PWM boards inside. http://www.highlandtechnology.com/DSS/P900DS.shtml You don't like the schematic style? I think that one is kind of nice. Good looking schematics work better. There are some really hideous schematics around. PADS looks good to me but only has one layer on schematics, just black on white. I wouldn't mind a usually hidden layer or two, with colors, for notes.
Reply by ●March 6, 20232023-03-06
On a sunny day (Sun, 05 Mar 2023 17:51:45 +0000) it happened Cursitor Doom <cd@notformail.com> wrote in <68l90i13cpp7v9ht76vjldjl810ipaglg1@4ax.com>:>Gentlemen, > >Over the years, I have found that there is one circuit fragment above >all others that I go back to repeatedly, and that is the PWM >controller in all its guises. I have made more of these than any other >electronic sub-circuit over the last 50 years and they come in handy >for all manner of different applications. >I'm just curious to know what others here find themselves going back >to repeatedly over the years and would welcome responses from sed >contributors north of the Tropic of Capricorn in this regard. > >Cheers, > >CD.I dunno about specific circuits, it al depends. For PWM generation I use Microchip PICs, those can generate PWM, have ADCs, reference voltage and communication hardware, hardware comparators plus a lot of other good stuff, internal clock if must be etc etc..: https://panteltje.nl/panteltje/pic/index.html There are so many more possibilities: https://panteltje.nl/panteltje/newsflex/download.html Much these days is software... Your question is like asking 'what letter of the alphabet do you use most'? Something to do with keyboard layout IIRC. 'Whatever is available' comes a lot closer as answer to your question.
Reply by ●March 6, 20232023-03-06
On a sunny day (Sun, 5 Mar 2023 13:33:22 -0500) it happened Phil Hobbs <pcdhSpamMeSenseless@electrooptical.net> wrote in <eeff52ba-cedf-6aed-3b21-0a84597f78e4@electrooptical.net>:>On 2023-03-05 12:51, Cursitor Doom wrote: >> Gentlemen, >> >> Over the years, I have found that there is one circuit fragment above >> all others that I go back to repeatedly, and that is the PWM >> controller in all its guises. I have made more of these than any other >> electronic sub-circuit over the last 50 years and they come in handy >> for all manner of different applications. >> I'm just curious to know what others here find themselves going back >> to repeatedly over the years and would welcome responses from sed >> contributors north of the Tropic of Capricorn in this regard. >> >> Cheers, >> >> CD. >> > >Bootstraps, superhets of one sort or another, noise cancellers, cap >multipliers, AC-coupled feedback loops, and a cast of thousands. ;)Phil did you ever look into the RTL-SDR world? https://www.rtl-sdr.com/about-rtl-sdr/ https://www.onelectrontech.com/rtl-sdr-v3-teardown-and-analysis/ Those sticks (and the chips) are available and can replace much of your RF stuff. I have 4 in use now..... one as spectrum analyzer + radio receiver (stereo FM) + radar detector + GPS reception + ham radio (AM FM SSB) plus any other RF. one to receive air traffic, one to receive ship traffic and one to receive data from my outside weather station. So first RF thing I turn to. Of course I have a real Tecsun PL600 radio too :-) Plus ... And can replace tons of boat anchors. https://panteltje.nl/panteltje/xpsa/index.html old version software, new one has many more buttons and FM stereo and even runs on a Raspberry Pi or your x86 leptop. Lots of open source software for it on the internet.
