[QUOTE=Chryseus;35810208]Or use a parallel pass transistor.
Example:
[/QUOTE]
This is what I've ended up doing, only need a single TIP2955 though,
So I ran out of solder, and I found a spool with Sn40 Pb60 solder, and it's really awful. The flux core is really tiny and evaporates before the solder even liquifies.
Also it's really weird when I reheat a solder joint, it kind of lumps together and doesn't become liquid at all.
Do you mean 60/40 ?
The flux is probably either crap or simply worn out.
[QUOTE=Chryseus;35827403]Do you mean 60/40 ?
The flux is probably either crap or simply worn out.[/QUOTE]
No, it is 40/60 :v:
[editline]4th May 2012[/editline]
[img]http://i50.tinypic.com/n19md1.png[/img]
Success!
[video=youtube;ndJJ5mhF9EI]http://www.youtube.com/watch?v=ndJJ5mhF9EI[/video]
This is for an alarm clock I am currently working on. Now I just need to find a radio controlled clock so I can strip out the longwave receiver.
[media]http://www.youtube.com/watch?v=Ji5Mf7i6ksI[/media]
Please excuse my horrible german accent
[QUOTE=DrLuke;35850840][media]www.youtube.com/watch?v=Ji5Mf7i6ksI[/media]
Please excuse my horrible german accent[/QUOTE]
Your Tesla coil doesn't appear to be getting very much juice.
[QUOTE=Zero-Point;35850923]Your Tesla coil doesn't appear to be getting very much juice.[/QUOTE]
No, it's just not tuned correctly yet, as it's just sweeping the frequency in an arbitrary range I defined. That's why it's not yet creating megasparks.
[QUOTE=DrLuke;35850967]No, it's just not tuned correctly yet, as it's just sweeping the frequency in an arbitrary range I defined. That's why it's not yet creating megasparks.[/QUOTE]
I was thinking more that it's not even capable of producing enough voltage where a near-direct short to ground can't burn an LED.
[QUOTE=Zero-Point;35851337]I was thinking more that it's not even capable of producing enough voltage where a near-direct short to ground can't burn an LED.[/QUOTE]
That's because it's not tuned to the proper frequency at all, as I already said. It's just a random frequency somewhere around +- 50 kHz near the resonance frequency, it's amazing anything is happening at all.
Also the whole thing is only powered with 12V instead of the 230V that are planned.
A little update to my project!
I found a bunch of old parts, and I added an LCD controlled by a Hitachi HD47780 controller, a 6264 (64K of RAM), and to top it all off, a Nohau 8051 in circuit emulator with trace board. Gonna see if I can get the LCD addressed with Memory mapped I/O, add some buttons, and get RS232 working!
[IMG]http://jetsurf.breakpointservers.com/emu2.png[/IMG]
Stuff is so old I had to dust off a P3 IBM laptop and load it with XP to get it all working.
Where the hell are you find this stuff? Its amazing!
[QUOTE=LoneWolf_Recon;35856002]Where the hell are you find this stuff? Its amazing![/QUOTE]
Helps to have a Dad that's a software engineer and did a shit ton of 8051 development!
Because my alarm clock was an utter peice of shit that wouldent even ring half the time, I applied screwdriver
There was not a single good solder joint in it
I'm just going to replace the entire board with an arduiono
[QUOTE=Tobba,;35859252]Because my alarm clock was an utter peice of shit that wouldent even ring half the time, I applied screwdriver
There was not a single good solder joint in it
I'm just going to replace the entire board with an arduiono[/QUOTE]
For the money you are going to spend on an arduino you could just buy a new clock.
Or an AVR or a minimalistic arduino, but for the love of god, don't stick a whole arduino board in there.
(I've also seen a commercial product with an arduino board inside already)
[QUOTE=DrLuke;35859877](I've also seen a commercial product with an arduino board inside already)[/QUOTE]
Are you serious, if so imagine what the next generation of electronics engineers will be like :suicide:.
Well, I guess the upside to is the easy replacement should something break v:v:v
[img]http://i46.tinypic.com/51wtmu.png[/img]
It was scary
[t]http://i.imgur.com/y5Px2.png[/t]
Vacuum tube power supply.
[url]http://uk.rs-online.com/web/p/toroid-transformers/6718993/[/url] Transformer I'm planning to use.
I'm currently in the process of creating a PCB for my tesla coil, instead of using stripboard.
The schematic:
[t]http://i46.tinypic.com/334ken5.png[/t]
The board so far:
[t]http://i50.tinypic.com/bdjgut.png[/t]
It's still WIP, all the traces that aren't manually routed will be autorouted.
You need to work on that schematic, it's a mess :v:
Yeah, I shouldn't have squeezed everything together so tightly
[QUOTE=DrLuke;35894526]I'm currently in the process of creating a PCB for my tesla coil, instead of using stripboard.
The schematic:
[t]http://i46.tinypic.com/334ken5.png[/t]
The board so far:
[t]http://i50.tinypic.com/bdjgut.png[/t]
It's still WIP, all the traces that aren't manually routed will be autorouted.[/QUOTE]
This post contains an awesome PDF about PCB layout technique for power components:
[url]http://www.cnczone.com/forums/563828-post89.html[/url]
Here's an example of a PCB I designed following those guidelines:
[url]http://yngndrw.hostilezone.net/uploads/H-Bridge%202.png[/url]
(The MOSFETs will mount underneath, which is why the capacitor goes over them - There are also some components which need changing, but it's the traces that I'm showing you.)
The point is where possible, flood-fill to create huge low-resistance traces. Also don't forget to expand the traces as much as you reasonably can and use a Kelvin ground to the logic ground plane.
Apparently, the patent on the Commodore SID chips has just expired a few weeks ago.
Cheap 8-bit goodness, here I come!
[QUOTE=yngndrw;35904121]This post contains an awesome PDF about PCB layout technique for power components:
[url]http://www.cnczone.com/forums/563828-post89.html[/url]
Here's an example of a PCB I designed following those guidelines:
[url]http://yngndrw.hostilezone.net/uploads/H-Bridge%202.png[/url]
(The MOSFETs will mount underneath, which is why the capacitor goes over them - There are also some components which need changing, but it's the traces that I'm showing you.)
The point is where possible, flood-fill to create huge low-resistance traces. Also don't forget to expand the traces as much as you reasonably can and use a Kelvin ground to the logic ground plane.[/QUOTE]
Could you please upload the PDF somewhere else? I have to register to access it
[QUOTE=VistaPOWA;35910758]Apparently, the patent on the Commodore SID chips has just expired a few weeks ago.
Cheap 8-bit goodness, here I come![/QUOTE]
Lets wait for the Chinese to start producing SIDs.
I really want to get into electronics and embedded programming, but I have no idea, where can I start?
[QUOTE=Staneh;35911779]I really want to get into electronics and embedded programming, but I have no idea, where can I start?[/QUOTE]
It depends if you want a quick start and then work your way into more complicated stuff or directly go knee deep into the shit.
For the first: buy an arduino
For the latter: buy an AVR
I suggest you get an arduino, it's a great platform for beginners to learn the basics without too much frustration
Right, i'll check it out.
Would something like this be good?
[url]http://www.adafruit.com/products/68[/url]
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