#garfield Logs

May 04 2022

04:57 AM Tom_L: .
08:45 AM rue_mohr: mornign
11:11 AM Tom_L: https://www.youtube.com/watch?v=GJOOLH9ZP2I
11:11 AM Tom_L: mostly for the casting
06:00 PM rue_mohr: heh $$$ investment
06:23 PM rue_mohr: so I missed a few pins on that fpga
06:24 PM rue_mohr: one in particular should probably be tied high
08:25 PM Tom_L: yeah lots of things you've tried were $$$ but you seemed to find a way around the $$$
08:50 PM rue_mohr: yup
09:00 PM Tom_L: any luck with the heater?
09:00 PM rue_mohr: I havn't done anything yet, I'm having energy problem
09:00 PM rue_mohr: s
09:01 PM rue_mohr: I got home at like 11am yesterday and slept till 3
09:01 PM rue_mohr: I could NOT stay awake at work
09:01 PM rue_mohr: it was getting dangerous
09:01 PM rue_mohr: but the plan is to set up a split coil and try to make it oscillate
09:02 PM rue_mohr: tho I'm pondering using a seperate transformer to do that and just drive into that coil with it
09:04 PM Tom_L: what frequencies are required for that?
09:04 PM Tom_L: and who was PT?
09:04 PM rue_mohr: thats where is better to use the tube itself as the transformer core, it will just work itself out
09:04 PM rue_mohr: PT?
09:04 PM rue_mohr: is? hmm
09:05 PM rue_mohr: no idea
09:05 PM rue_mohr: so, if I use 24V
09:05 PM rue_mohr: maybe 400w
09:06 PM rue_mohr: 16A
09:06 PM rue_mohr: not too bad
09:06 PM rue_mohr: whats a 2N3055 worth?
09:07 PM rue_mohr: 15A, that doesn't work
09:07 PM Tom_L: 6 bux
09:07 PM rue_mohr: I'm not sure on building an IGBT osc
09:08 PM Tom_L: Bipolar Transistors - BJT 15A 60V 115W NPN
09:10 PM Tom_L: Bipolar Transistors - BJT 20A 140V 250W NPN
09:10 PM Tom_L: ten bux
09:11 PM Tom_L: MJ15003G
09:41 PM rue_mohr: hmm, the comuter power supplies have a mje1300x in them
09:44 PM Tom_L: 1.5A 300v
10:05 PM rue_mohr: hmm
10:05 PM rue_mohr: I have some igbt, I just dont know how to make an oscillator with them
10:05 PM rue_mohr: like that
10:05 PM rue_mohr: I'll try things
10:05 PM rue_mohr: still have to make a phone call and model up a 3d thing
10:06 PM Tom_L: you feelin ok?
10:06 PM Tom_L: or just can't sleep...
10:06 PM rue_mohr: I could use a bit more spunk
10:06 PM rue_mohr: I really really loaded upon the B12 today
10:09 PM Tom_L: https://patentimages.storage.googleapis.com/f2/cf/20/05c837130753af/00000001.png
10:11 PM Tom_L: better yet....
10:11 PM Tom_L: https://www.homemade-circuits.com/wp-content/uploads/2019/04/IGBT-induction-heater.png
10:12 PM Tom_L: https://www.homemade-circuits.com/induction-heater-circuit-using-igbt/
10:28 PM rue_mohr: yea
10:29 PM rue_mohr: I bought one from china so I wouldn't screw it up and it exploded right out of the gate
10:29 PM rue_mohr: I put the coil right up to the pipe and I think I should hhave spaced it
10:39 PM Tom_L: huh
10:53 PM rue_mohr: so, I'll just try soemthing
10:53 PM rue_mohr: but I'm having time problems
10:54 PM Tom_L: yeah, that's why i started limiting what i could do
10:57 PM rue_mohr: I think I should rewind the pipe, with a center tapped coil
10:57 PM rue_mohr: whcih really sucks
10:57 PM rue_mohr: I actually did that on my lathe
10:57 PM rue_mohr: I wionder how many turns I need
10:58 PM Tom_L: i've seen a couple of those used for tooling and they didn't have many turns at all but they were high voltage probably
10:59 PM Tom_L: and they acted pretty much instantly
11:48 PM rue_mohr: yes
11:49 PM rue_mohr: I cant succsessfully design one of that type
11:49 PM rue_mohr: and when I bought one, I blew it up
11:50 PM rue_mohr: so I'll try it my way
11:50 PM rue_mohr: I was pretty annoyed when that blew up, it wasn't really cheap
11:58 PM rue_mohr: 2561
11:59 PM rue_mohr: I think it jumped