[QUOTE=Hng;45100221]What are some fun things to do with a raspberry pi? What have you guys done?[/QUOTE]
I attached some 1Wire temperature sensors to the GPIO and wrote some code to dump them on my home server's MySQL server. Then I threw together a webpage to display the data: [url]http://home.benjeffery.ca/templog[/url]
Hooked up a USB LCD to make a clock: [url]http://i.imgur.com/vPsvf34.jpg[/url]
And I have RTL_TCP running so I can control and stream my RTL2832U dongle to my phone or another computer.
Until more applications support Wayland, using it with a monitor attached is an exercise in frustration. Using the CPU to render the desktop makes things pretty slow.
[QUOTE=LoneWolf_Recon;45104916]HiddenMyst is currently building an all in one keyboard PC using a Pi.[/QUOTE]
Oh I finished that. It was super fun and I think the most rewarding feeling when it all wrapped up.
[t]https://dl.dropboxusercontent.com/u/62766551/Norseboard/P4060253.jpg[/t]
[QUOTE=Hng;45100221]What are some fun things to do with a raspberry pi? What have you guys done?[/QUOTE]
The most fun you'll have with it is making some sort of embedded project. My next one will be retrofitting an old Brownie 8mm Cine Cam with a Raspberry Pi and camera board. It's going to be a retro, wifi video camera.
Did you 3d print those parts? Maybe you want to take a look at acetone vapour smoothing to give them a smooth surface!
[QUOTE=Hng;45100221]What are some fun things to do with a raspberry pi? What have you guys done?[/QUOTE]
I recently got new headphones and when I put them on I can't hear shit, because they isolate so well.
So I hooked up some LEDs to my RPi and set up a script that blinks the LEDs whenever it receives an UDP packet, so that whenever anyone in my family needs something they just shoot a packet my way with their phones and I'll be there. v:v:v
[QUOTE=DrDevil;45107132]Did you 3d print those parts? Maybe you want to take a look at acetone vapour smoothing to give them a smooth surface![/QUOTE]
It's PLA, so acetone won't really help there. It's not really a big deal as far as I see it because the case is only there to keep the whole thing together as one.
If/when I revisit this same sort of project in the future I'll just get the case milled out of aluminium, but it will be a custom designed mechanical keyboard by then with stronger embedded computer.
[QUOTE=HiddenMyst;45109592]It's PLA, so acetone won't really help there. It's not really a big deal as far as I see it because the case is only there to keep the whole thing together as one.
If/when I revisit this same sort of project in the future I'll just get the case milled out of aluminium, but it will be a custom designed mechanical keyboard by then with stronger embedded computer.[/QUOTE]
i would suggest covering it in epoxy to make it completely smooth then buff it all up :)
[QUOTE=nutcake;45109428]I recently got new headphones and when I put them on I can't hear shit, because they isolate so well.
So I hooked up some LEDs to my RPi and set up a script that blinks the LEDs whenever it receives an UDP packet, so that whenever anyone in my family needs something they just shoot a packet my way with their phones and I'll be there. v:v:v[/QUOTE]
That is genius.
[QUOTE=Leestons;45110374]That is genius.[/QUOTE]
A German + a problem = no problem.
How does your family send you UDP packets?
An app on their phones, I couldn't be bothered to make one myself so I just set up [URL="https://play.google.com/store/apps/details?id=com.synprez.udp_tester"]this one here[/URL], so they just have to press "send".
i just 'accidently' my £1400 powersupply :/ sent an email to support for help...
That's an expensive power supply, what happend?
[QUOTE=ddrl46;45111950]That's an expensive power supply, what happend?[/QUOTE]
I was driving a motor with a chopper circuit and forgot to put a backemf diode.
What kind of powersupply was it
[QUOTE=DrDevil;45112251]What kind of powersupply was it[/QUOTE]
I am not dumb, i just made a little mistake and forgot to add it in, just slipped my mind.
the powersupply is 0-72V 0-20A SMPS powersupply
SMX7220 Delta Elektronika
[QUOTE=nuttyboffin;45112321]I am not dumb, i just made a little mistake and forgot to add it in, just slipped my mind.
the powersupply is 0-72V 0-20A SMPS powersupply
SMX7220 Delta Elektronika[/QUOTE]
Sorry, but when you operate such expensive equipment, it's pretty dumb to forget a freewheeling diode.
[QUOTE=DrDevil;45112398]Sorry, but when you operate such expensive equipment, it's pretty dumb to forget a freewheeling diode.[/QUOTE]
A dumb and unfortunate mistake; though that doesn't make him stupid. I believe [i]your people[/i] has a saying, "Übung macht den Meister".
[QUOTE=Kirth;45112415]A dumb and unfortunate mistake; though that doesn't make him stupid. I believe [i]your people[/i] has a saying, "Übung macht den Meister".[/QUOTE]
Well, I didn't say he's stupid.
Also this discussion is offtopic as hell, so let's stop it right here.
Doesn't the PSU have internal protection?
[QUOTE=DrDevil;45112465]Well, I didn't say he's stupid.
Also this discussion is offtopic as hell, so let's stop it right here.
Doesn't the PSU have internal protection?[/QUOTE]
It will probibly not be a too bad fix, i would have thought it does, not too sure.
I only paid £200 for it and then i fixed it (the sense wire was broken at the time) but a new one would be £1400 )
Either way it will be fixable one way or another.
Most power supplies don't really protect against High voltage on the output, you may get lucky and they used a TVS which is now shorted or worse it took out an IC such as a secondary side PWM controller, assuming they actually used off the shelf parts it should be an easy fix.
[QUOTE=Chryseus;45114834]Most power supplies don't really protect against High voltage on the output, you may get lucky and they used a TVS which is now shorted or worse it took out an IC such as a secondary side PWM controller, assuming they actually used off the shelf parts it should be an easy fix.[/QUOTE]
I do believe it is all off the shelf :)
they will hopefully tell me what exactly would have blown due to such a thing.
ALSO
Soon, i may be getting hold of a 75kV transformer (or maybe twice as high..... oooohhhh! :D)
Pardon me, its 50kV, but its damn big and im not gonna burn it out, even at a 40A+ input.
[media]http://www.youtube.com/watch?v=ovj9YnejJ1w[/media]
gonna be this one (it will have a better connector that won't be sparking however.
also note that transformer is only running at around 20V when its designed for around 415V
Working on a customer's reciever. Power LED lights up but no sound or display. Hmm....
[thumb]http://i.imgur.com/KTgPnZ2.jpg[/thumb]
[editline]17th June 2014[/editline]
Oh my...
[thumb]http://i.imgur.com/dXXbSIg.jpg[/thumb]
The exploded cap reads as a dead short and the other one reads about 120 ohms. Nasty things.
Great news. Worked out whats broken in it, with a little help from the company (still would have worked it out without them)
the Diode BYW93 200U has broken.... need to find a new one or equivilent.
Cleaned up and ready for new caps.
[thumb]http://i.imgur.com/dXXbSIg.jpg[/thumb]
[thumb]http://i.imgur.com/AJIjJNa.jpg[/thumb]
[QUOTE=nuttyboffin;45130452]Great news. Worked out whats broken in it, with a little help from the company (still would have worked it out without them)
the Diode BYW93 200U has broken.... need to find a new one or equivilent.[/QUOTE]
Do you mean the DO-5 one rated for 80A ?
That's a pretty damn good diode, I can't find any on mouser, farnell or digikey that meet its reverse recovery time of 50ns and 80A forward in DO-5, looks like your going to have to do a hack job.
You could try a slower recovery diode, I suspect it would work fine.
[QUOTE=No_Excuses;45130811]Cleaned up and ready for new caps.
[thumb]http://i.imgur.com/dXXbSIg.jpg[/thumb]
[thumb]http://i.imgur.com/AJIjJNa.jpg[/thumb][/QUOTE]
woah, I thought the shit inside capacitors was fairly acidic. the pcb looks like new now :D
[QUOTE=Chryseus;45130853]Do you mean the DO-5 one rated for 80A ?
That's a pretty damn good diode, I can't find any on mouser, farnell or digikey that meet its reverse recovery time of 50ns and 80A forward in DO-5, looks like your going to have to do a hack job.
You could try a slower recovery diode, I suspect it would work fine.[/QUOTE]
The company is actually sending me 2 free of charge! :)
That's very nice of them, I couldn't even [u]pay[/u] for a spare part off a well known professional amplifier maker whom shall remain nameless. It had to be perfect to fit the chassis too, ended up repairing the part instead.
Annoying.
[QUOTE=scratch (nl);45132679]woah, I thought the shit inside capacitors was fairly acidic. the pcb looks like new now :D[/QUOTE]
It's just an electrolyte. Batteries on the other hand...
