Just some photos from the tournament my team and I went to back in December. For me, it was a good learning experience. And good to watch some of the matches of the higher belts going at it.
I’ve got most of the big/expensive parts I need. However I’m having a small break in building this. Mainly because I want to build in some extra features and safe guards in the power supply. With one small thing leading to another I’ve got quite the list of things I want to add in. I’d better start working on what I’ve got so far or I may never finish.
|Arduino/ATmega I/O Count and Function|
|3||Voltage monitoring: Input, MOT, Multiplier|
|3||Current monitoring: Input, MOT, Multiplier|
|1||MOT on/off relay|
|1||Variac outlet on/off relay|
|1||Variac input on/off relay|
|1||1-wire Temperature sensors (Variac, MOT, case ambient)|
|2||Variac stepper control (A4988 step, direction)|
|1||Variac zero endstop|
|1||“crowbar” safety servo/stepper for MOT output|
|2||SPI/I2C in/out for wireless control and data logging|
|1||10 Mhz reference source – (maybe ttl clock instead?)|
Safeties and other niceties
Lots on those two wishlists with a few more items I may have forgotten. Also sourcing a case for all this is challenging. Maybe I’ll just use the microwave oven as the case. Plenty of space inside for things. Maybe look at reusing some of the existing circuitry. Maybe it has a nice micro controller inside.
Mmmmmm Breakfast. I rarely have time for a fancy breakfast. Fancy being eggs, bacon, sausages, pancakes/waffles, apple, orange juice, hash browns and all that. A good simple breakfast is what I need. I make my lunches ahead of time, so why not breakfast? Most store bought (and by most I mean 99.9%) breakfast cereals are full of sugar. Usually the ingredients list goes something like this, “Crap, sugar, more crap.” It turns out quite a number of people out there have breakfast figured out. See the likes of link 1, link 2 and link 3.
Here’s my variation on those themes. It seems quite healthy and a whole lot more filling than bangers and pancakes.
Not pictured is almond milk and the steel cut oats. The look like regular oatmeal put through a bladed coffee grinder or blender.
I usually make these up in batches of three and stick them in the refrigerator till it’s time to eat. Here’s the quantities of each I use of each ingredient:
That is really quite a lot of calories, but I also exercise regularly and don’t eat a whole lot of junk food snacks. Here’s the total combined nutritional breakdown of all that combined.
I was starting to worry about finding a glass bell jar to use as ebay prices are well over $100 shipped to Canada. Walmart has this 7.5 litre jar for $20. Not bad. Now I just need a lit. The lid it came with isn’t very suitable for my purposes.
Here it is flipped upside down. Some distortion in the imperfect glass. Most of the blurred insides are due to the shallow depth of field at f/1.2.
Home Depot has acrylic sheets of varying dimensions. The thickest they had was .22 inches. Not very thick, considering others on the web are using thickness between .5″ to 1″. Well, for $45 I’ll give it a shot, with a reinforcement trick.Cheaper than spending upwards of $100 online for a single 12″ x 12″ sheet, mostly due to shipping costs. I can get 4 circular plates out of this one sheet. That means 1 circle inside for bracing and 3 blanks that go on the outside. I could build this Fusor as well as a Scanning Electron Microscope and still have one more blank to spare.
Those circles are just done in dry erase, with the protective plastic still on the acrylic. I’ll do something up in a cad program and print it out so it’s all nice and neat. Then dremel out the bigger circles and hole saw the middle ones. The diameter for the circles are about 10″ for the big ones and 1.75″ for the smaller ones. The dotted line marks a border for inner neck of the jar has to fit over any apparatus that may stick out.
Here it is on top of the reinforcement draft template.
It finally arrived. And ahead of the vacuum pump that shipped first.
I thought it important to know what the weight of the variac is as it is quite heavy. Mounting it so it is sturdy is important. The back plane is live voltage. I don’t want it to touch anything because of a weak case design.
Just for some comedic relief I decided to weigh myself and then after dinner weigh the variac and myself at the same time. Then subtract the difference. I weighed 214.5 pounds before dinner. Next it was time for dinner. I won’t bore you with the details, but I had some wings, pizza and beer. I also had some Vega one protein drink for dessert. After all that it was time I weigh myself with again, this time holding the variac. Me, dinner, dessert and the variac weigh …
Joking aside, although this unit is used the brush looks to be in good order. However about 2/3 of the range is very difficult to turn by hand.
Yup… I want to make one of these. Should be a fun project. I think I’ll learn lots.
I’ve bought a few things off ebay… and still working on getting some other misc parts. For now I’m going to try to keep costs to a minimum.
This single stage vacuum pump had a buy it now price of $54.90(USD), so I couldn’t resist. I was looking at other pumps costing upwards of $250. It’s rated to 5 pascals (50 microns). That should be plenty good I think. Good enough as a roughing pump for Diffusion Pumps. 3 CFM 1/4HP Rotary Vane Deep Vacuum Pump (ebay# 360644211571)
I’ve got the transformer and high voltage doubler cap out of a RCA RMW733 microwave oven. The microwave was $50, not bad. I didn’t want one of the newer inverter models as the way they limit the current isn’t exactly what I want. I’ll do current limiting using a triac light dimmer if I need to. The microwave oven was rated at 700 watts. That is the microwave output power is rated 700 watts. The input power for the transformer will be much higher. Perhaps over 900 watts. I’ll measure this later. I plan to put in some current measurement/safety into the high voltage PSU.
I also grabbed a used variac from ebay for $83.50 after shipping. It’s rated at 1KVa. Half the price for double the power for others listed on ebay, after shipping of course. Here’s a picture the seller had on the listing. lets hope it gets here in good shape.
Still a few items I need to source to get a demo grade Fusor going.
Kombucha with Pineapple juice is pretty good. Maybe a bit strong, I think I’ll have to dilute it slightly. Either that or just stop making it so strong. I think the scoby likes it though.
Pictured below is non-diluted Buch with big mother SCOBY and two babies. As the mother is still only two months young from just liquid drink, this batch is still slightly acidic.