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Registered Member #902
Joined: Sun Jul 15 2007, 08:17PM
Location: North Texas
Posts: 1040
My new RAM Disk benchmarks.... for the fastest game load times ever hehe.
I used to use a program called "RAMDisk" by DataRAM, which worked great until I installed new RAM to max out my motherboard at 64GB. Then it crashed for some reason, so I've been using IMDisk VDD with manual saving to HDD until I fix it.
Registered Member #902
Joined: Sun Jul 15 2007, 08:17PM
Location: North Texas
Posts: 1040
Came across this while cleaning out a parts shelf. Last Spring I got bored between two classes which were separated by 45 minutes, so I put together a coilgun out of parts I had lying around (coil not found when I dug this up):
Registered Member #5258
Joined: Sun Jun 10 2012, 10:15PM
Location: Missouri - USA
Posts: 119
DaJJHman wrote ...
Came across this while cleaning out a parts shelf. Last Spring I got bored between two classes which were separated by 45 minutes, so I put together a coilgun out of parts I had lying around (coil not found when I dug this up):
-Jimmy
Disposable camera flash circuit dumped into a small coil. :D
Registered Member #952
Joined: Mon Aug 13 2007, 11:07AM
Location: Finland
Posts: 388
Hi there!
I haven't been too much into high voltage lately, but I recently found an old secondary wound around a film canister. I threw together a simple driver from scrap parts, and much to my surprise, it worked!
This thing is powered by a 12V/300mA wall wart. The driver is simply 74HC14 -> BS170 (level shift to 12V) -> 2N3904/06 totem -> IRFP240. There's also a 555 timer which is interrupting the signal. Break rate is currently 2 Hz as I don't believe the little wall wart could survive much more. F_res is about 5 MHz. Antenna feedback is not too reliable, I might try PLL next. It occurs to me this one could also benefit from a boost converter charging a capacitor to a little higher voltage and discharging it to the primary... We'll see, this could become quite nice a nano coil.
Registered Member #3900
Joined: Thu May 19 2011, 08:28PM
Location:
Posts: 600
My Easter weekend was a bit of fun
This was what my half bridge smps turned into in a real hurry. It's running off of 28v @ 5.6A, I don't think it'll handle mains simply because of inadequate gate drive(don't try switching 300nC gates with 350mA gate drivers unless you like the looks of natural logs). Three stacked gate drive chips still aren't enough to charge all 12v across the gate during the entire half cycle, so i'm waiting on the 3A ones coming in the mail.
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