Cory J. Geesaman

Decent price for 2 lbs of NaOH - to lyse some cells.

The other 1/2 of cathodes for an ion pump.

1/2 of the cathodes for a noble triode ion pump.

Side panels for a device - good price for the size.

This is 50% alkyldimethylbenzylammonium chloride (the other 50% is 40% water with 10% isopropyl alcohol) - which can be broken down into the aforementioned Amomonium cation for synthesis of quaternary ammonium-imide salt electrolytes in custom electric double layer capacitors. Not sure how this stuff works as an algaecide or if $20 is a good price for algaecide - but its the only product I found that contained a large percentage of a quaternary ammonium cation that could be easily separated from the rest of the molecule (after separation from the solution of course).

Decent price for the precision.

Could't find any easy synthesis specifically for Ammonium-Imide's so I'm going with Oxalic Acid + Ammonia + heat to get what should be an an imide group that I can then attach to an Ammonium cation after separation from the solution. Will definitely be doing this with good ventilation. Oh, and I got this from the Online Science Mall store on eBay - they are definitely the best for a wide selection of lab products on eBay.

For the ends of some prototype high voltage electric-double-layer-capacitors. I know a couple people following me on here seem to know chemistry, so as an aside - anyone know an easy way to synthesize ammonium-bisimide? I ask because I really don't want to get near ammonium-cyanimide but have heard good things about room-temp molten ammonium-imide's as high energy density electrolytes.

Great deal, less than $20 with shipping and they lack the copper coating (just want the carbon). Grinding these into powder and pyrolysing it via salt water elecrolysis with high current AC over a metal screen (not sure if that's a common technique, discovered it by accident a couple months back] to form activated carbon powder without needing to build a blast furnace or use strong acids/bases) for use in a paste that will go into homemade electric double layer capacitors (ultracapacitors) that work at excessively high voltages for EDLCs based on a technique I found tonight. The torroids ordered the other day are probably going to be useless until I find a new experiment for them, as I've decided to go with an even cheaper and more stable solution than 210KVA worth of transformers - 210KVA worth of ultracaps for about a 1 hour runtime (approx 3024 Farads @ 500V) - with modern ultracapacitors this comes to a bit over $18,000 if bought at wholesale prices (due to the cost of stacking 2-2.5V ultracapacitors to work with 500 volts, 3024F @ 2-2.5V is only about $40-60). Due to the significant cost difference (these rods, a few household chemicals and some flashing from home depot should be enough to meet my needs) I might end up selling my version of these HV ultracaps.

Decent price, though kinda bummed I missed out on a lot of 10 T200-6's that were on eBay the other day for about the same price. Need this to test the feasibility of a parallel transformer/voltage regulator system - as I have a need for approximately 210KVA over 30 channels to supply the appropriate power to an experiment, and building/buying 30 7KVA transformers is ridiculously expensive for a power supply.

There's nothing like buying $230 worth of heatsinks for high power MOSFETs to drive home the point you're a nerd with very little life. I recommend this seller though, I was able to contact him easily over eBay and get the price down from a bit over $400 - very good seller and I've ordered a few (much smaller quantity) of these heatsinks from him before.

more robot joint components

Lots (54) 3"x4"x1/16" double sided PCB very cheap ($37.35 for all 54 with shipping) - highly recommend this PCB vendor, made in America and ridiculously low prices (I don't recall the exact price, but if you were you to get 54 of these from Radioshack [assuming they even had that many in the store] you'd pay somewhere around $120-150 for them). These are for 30 500V/14A H-bridge's, though have to order in bulk to get prices down on the MOSFETs and heatsinks so I have enough for 37 of them in all.

I don't want to detract too much from how great Ozzy is, but there is something I actually should state about ordering from Walmart: don't do it. I only placed the order through them because I despise everything Apple (far more than Walmart) and couldn't see another way to order music, so I made the account just to order this album (didn't want to risk ordering from someone on eBay that just ripped one they bought and resold copies). I will never shop at Walmart again just because the horrible website they have - first I had to register twice to find that I already had an account from years ago due to a lack of a proper error message, then after resetting the password I ordered twice because the freaking website lost a tracking cookie (not browsing privately or by proxy or any of that nonsense) and it went to PayPal twice. Then after the order actually showed up as processed (having to re-register a couple more times for reasons beyond anything I am capable of comprehending) I found it used an old (non-default) address from when I lived in Redmond (not sure how Walmart was even able to access that, being a setting that wasn't meant to be passed from PayPal and set correctly within PayPal - and separately entering the correct address 5x on the Walmart website. So then I opened a trouble ticket, to get an automated reply, that translated from the language of poor technical support loosely means: "we are going to make you jump through hoops for weeks to get your $11.04 back, and we aren't going to update the ship-to address before it arrives from our automated system" - on top of which the ability to cancel the order has been disabled on the Walmart site after being enabled a moment ago, indicated it has probably passed through the point of no return in their automated system and is now being handled by a hoard of bureaucratic packaging robots - so in summary, Ozzy rocks, don't order from Walmart, its like the British legal system crossed with the Matrix and it will agitate you.

more robot joint material

really tiny coils - these don't work so well due to the lack of traction along the outsides to get the proper ratio of windings, have to score the edges with a razor on top of an outline with the pattern on paper, trying to determine a better method

more robot ball joints

for robot ball joints

robot bones - spot welding onto steel balls (probably should have gone with a different ball due to the chromium, but eh, works fine if you leave it burning a little longer and don't inhale the smoke)

just some relatively low-voltage diodes