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stonehenge regulator

Started by John Larkin September 26, 2019
I have a 48 volt power supply and I want to drive a lot of relays and
uPs and FPGAs and stuff, so I figured I'd knock it down to 12 volts
first.

We have LM2567HV-ADJ in stock, a 52 KHz Simple Switcher probably
designed by druids during the last ice age. Figured I'd breadboard the
reg just for fun. A boy gets tired of typing all day.

https://www.dropbox.com/sh/ajtqs7c1nswfhey/AABi7r0gchljjrxka4aHZItfa?dl=0


Works pretty well, actually. Nothing gets very warm at 1 amp out.

Yes, that unshielded drum core will spray field everywhere, but then I
am simulating alternators.

On Thursday, 26 September 2019 22:56:15 UTC+1, John Larkin  wrote:
> I have a 48 volt power supply and I want to drive a lot of relays and > uPs and FPGAs and stuff, so I figured I'd knock it down to 12 volts > first. > > We have LM2567HV-ADJ in stock, a 52 KHz Simple Switcher probably > designed by druids during the last ice age. Figured I'd breadboard the > reg just for fun. A boy gets tired of typing all day. > > https://www.dropbox.com/sh/ajtqs7c1nswfhey/AABi7r0gchljjrxka4aHZItfa?dl=0 > > > Works pretty well, actually. Nothing gets very warm at 1 amp out. > > Yes, that unshielded drum core will spray field everywhere, but then I > am simulating alternators.
Stone age would be a carbon pile adjusted by a solenoid. NT
On Thu, 26 Sep 2019 15:11:14 -0700 (PDT), tabbypurr@gmail.com wrote:

>On Thursday, 26 September 2019 22:56:15 UTC+1, John Larkin wrote: >> I have a 48 volt power supply and I want to drive a lot of relays and >> uPs and FPGAs and stuff, so I figured I'd knock it down to 12 volts >> first. >> >> We have LM2567HV-ADJ in stock, a 52 KHz Simple Switcher probably >> designed by druids during the last ice age. Figured I'd breadboard the >> reg just for fun. A boy gets tired of typing all day. >> >> https://www.dropbox.com/sh/ajtqs7c1nswfhey/AABi7r0gchljjrxka4aHZItfa?dl=0 >> >> >> Works pretty well, actually. Nothing gets very warm at 1 amp out. >> >> Yes, that unshielded drum core will spray field everywhere, but then I >> am simulating alternators. > >Stone age would be a carbon pile adjusted by a solenoid. > > >NT
Dynamotor.
On 9/26/19 5:56 PM, John Larkin wrote:
> I have a 48 volt power supply and I want to drive a lot of relays and > uPs and FPGAs and stuff, so I figured I'd knock it down to 12 volts > first. > > We have LM2567HV-ADJ in stock, a 52 KHz Simple Switcher probably > designed by druids during the last ice age. Figured I'd breadboard the > reg just for fun. A boy gets tired of typing all day. > > https://www.dropbox.com/sh/ajtqs7c1nswfhey/AABi7r0gchljjrxka4aHZItfa?dl=0 > > > Works pretty well, actually. Nothing gets very warm at 1 amp out. > > Yes, that unshielded drum core will spray field everywhere, but then I > am simulating alternators. >
Stonehenge! Where the demons dwell Where the banshees live and they do live well Stonehenge! Where a man's a man And the children dance to the Pipes of Pan
Am 27.09.19 um 00:27 schrieb bitrex:

> Stonehenge! Where the demons dwell > Where the banshees live and they do live well > Stonehenge! Where a man's a man > And the children dance to the Pipes of Pan
No more banshees and demons. Nowadays: tourists, by the 1000s. The parking lot is 5 Km away, and an endless stream of people between the parking lot and the stones. We gave up. The picture is a drive-by shot from the country road, from the moving motorbike. Wide angle lens, obviously without looking through the camera and later cropped/rotated in the computer. And we got wet! Riding a submarine would have been appropriate for that trip. < https://www.flickr.com/photos/137684711@N07/27945899204/in/album-72157668637947473/ > Orkney is much better, if you can go there. < https://www.flickr.com/photos/137684711@N07/22892154751/in/album-72157660575819870/ > Gerhard
John Larkin wrote...
> > I have a 48 volt power supply and I want to drive a lot of > relays and uPs and FPGAs and stuff, so I figured I'd knock > it down to 12 volts first. > > We have LM2567HV-ADJ in stock, a 52 KHz Simple Switcher > probably designed by druids during the last ice age. > Figured I'd breadboard the reg just for fun. A boy gets > tired of typing all day. > >https://www.dropbox.com/sh/ajtqs7c1nswfhey/AABi7r0gchljjrxka4aHZItfa?dl=0 > > Works pretty well, actually. Nothing gets very warm at 1 amp out.
LM2576? Too bad you have the slow-mo 52kHz versions in stock. Would be better if you had the 150kHz LM2596 in stock instead. Time to over-rule the established inventory tyranny. -- Thanks, - Win
Gerhard Hoffmann wrote...
> > The parking lot is 5 Km away, and an endless stream > of people between the parking lot and the stones.
I rode by on the train to Bath, imagining the scene, without any tourist distractions. -- Thanks, - Win
On Friday, September 27, 2019 at 9:38:49 AM UTC+10, Gerhard Hoffmann wrote:
> Am 27.09.19 um 00:27 schrieb bitrex: > > > Stonehenge! Where the demons dwell > > Where the banshees live and they do live well > > Stonehenge! Where a man's a man > > And the children dance to the Pipes of Pan > > No more banshees and demons. > Nowadays: tourists, by the 1000s. > > The parking lot is 5 Km away, and an endless stream > of people between the parking lot and the stones. > > We gave up. The picture is a drive-by shot from the > country road, from the moving motorbike. Wide angle lens, > obviously without looking through the camera and later > cropped/rotated in the computer. > > And we got wet! > Riding a submarine would have been appropriate for that trip.
I visited it in the 1970's when you could still wander between the actual stones and actually touch them. Sort of impressive, as it was clearly designed to be. The astronomical alignments are well documented, but smaller chunks of rock would have done that job equally well. -- Bill Sloman, Sydney
On 26 Sep 2019 18:19:39 -0700, Winfield Hill <winfieldhill@yahoo.com>
wrote:

>John Larkin wrote... >> >> I have a 48 volt power supply and I want to drive a lot of >> relays and uPs and FPGAs and stuff, so I figured I'd knock >> it down to 12 volts first. >> >> We have LM2567HV-ADJ in stock, a 52 KHz Simple Switcher >> probably designed by druids during the last ice age. >> Figured I'd breadboard the reg just for fun. A boy gets >> tired of typing all day. >> >>https://www.dropbox.com/sh/ajtqs7c1nswfhey/AABi7r0gchljjrxka4aHZItfa?dl=0 >> >> Works pretty well, actually. Nothing gets very warm at 1 amp out. > > LM2576? Too bad you have the slow-mo 52kHz versions in stock. > Would be better if you had the 150kHz LM2596 in stock instead. > Time to over-rule the established inventory tyranny.
To put a new part into stock, I have to fill out forms and stuff. We already have 40 different switcher chips in stock. And 75 linear regs. That should be plenty. The LM2596 is only rated for 40 volts input. The 2576HV is ok to 60. There aren't a lot of high voltage switchers around. Hey, we do have the 2596ADJ in stock! -- John Larkin Highland Technology, Inc lunatic fringe electronics
On 27/09/19 00:38, Gerhard Hoffmann wrote:
> Am 27.09.19 um 00:27 schrieb bitrex: > >> Stonehenge! Where the demons dwell >> Where the banshees live and they do live well >> Stonehenge! Where a man's a man >> And the children dance to the Pipes of Pan > > No more banshees and demons. > Nowadays: tourists, by the 1000s. > > > The parking lot is 5 Km away, and an endless stream > of people between the parking lot and the stones. > > We gave up. The picture is a drive-by shot from the > country road, from the moving motorbike. Wide angle lens, > obviously without looking through the camera and later > cropped/rotated in the computer. > > And we got wet! > Riding a submarine would have been appropriate for that trip. > > < > https://www.flickr.com/photos/137684711@N07/27945899204/in/album-72157668637947473/ > &nbsp; > > > Orkney is much better, if you can go there. > < > https://www.flickr.com/photos/137684711@N07/22892154751/in/album-72157660575819870/
Basically, I agree with that assessment of Stonehenge. I used to enjoy sitting on the stones and having a picnic, just as I used to enjoy using Downing St as a shortcut. No more, alas. However, there are other nearby places that retain the atmosphere: - Avebury ring (largest) - Silbury hill (can't climb it anymore) - West Kennet long barrow and further away: - Stanton Drew stone circles (second largest) - Hetty Pegler's tump (like the West Kennet long barrow) - Kilmartin Glen, in Scotland