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  • imsmooth commented on imsmooth's instructable Nitrogen Gas Generator3 months ago
    Nitrogen Gas Generator

    The project will probably run about $1000

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  • imsmooth commented on imsmooth's instructable Homemade Liquid Nitrogen Generator3 months ago
    Homemade Liquid Nitrogen Generator

    Thank you.

    Interesting. I might try it and see if there is a significant difference. I would have to use a solder gun and not a torch. If I used a MAPP torch the temperature might change the properties of the steel tubing, reducing its failure pressure rating and risk a pipe rupture. Solder, though, may not stick to the smooth stainless steel surface. I'll post my findings if I do it.

    Alysson I'm just curious I've received a lot of comments today how did you find this instructable? was it featured somewhere ?

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  • imsmooth commented on imsmooth's instructable Nitrogen Gas Generator4 months ago
    Nitrogen Gas Generator

    Look at the videos on the link. O2 diffuses into the porous CMS due to the high pressure and N2 rich gas exists.http://www.homemadeliquidnitrogen.com/PSA/CMS%20material.html

    Visit www.homemadeliquidnitrogen.com/PSA for more information.Each tank is isolated with a solenoid gas valve. Both tanks join at the bottom and feed to a flow valve that controls the amount of gas that exists. This allows the pressure to build since more gas is going in than coming out. See the diagrams at the above link.

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  • imsmooth commented on imsmooth's instructable Nitrogen Gas Generator5 months ago
    Nitrogen Gas Generator

    I think I left the contact information on my website tutorial for the N2 generator.

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  • imsmooth commented on imsmooth's instructable Nitrogen gas generator6 months ago
    Nitrogen gas generator

    I currently have a matching pair of two brass Versa 1/4" 3-way valves that I used for this project. If you are interested in them you can email me privately. They are $130 a piece or $240 for the pair. They are practically brand new and in perfect working condition.

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  • imsmooth commented on imsmooth's instructable Nitrogen gas generator7 months ago
    Nitrogen gas generator

    Send me your email and I'll reply back with the arduino file you need for the build.

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  • imsmooth commented on imsmooth's instructable Nitrogen gas generator7 months ago
    Nitrogen gas generator

    I think if you go to my website tutorial the code is there.http://homemadeliquidnitrogen.com/PSA

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  • imsmooth commented on imsmooth's instructable Homemade liquid nitrogen generator7 months ago
    Homemade liquid nitrogen generator

    Air. You should read the full explanation at www.homemadeliquidnitrogen.com

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  • imsmooth commented on imsmooth's instructable Nitrogen gas generator7 months ago
    Nitrogen gas generator

    Smaller scale - yes.With PVC? Not a good idea. With the given diameter of the tube and a pressure over 100psi you risk bursting the tube and getting shrapnel in your body.

    The higher the pressure, the purer the outgas. I get over 98% pure with a pressure of 130psi. You can do 100psi and get about 95-93% with the same amount of material. If you use narrower tubing you will need very long pieces to hold enough material to get a reasonably concentrated gas.

    I got mine from Interra Global. See if Bill Wallace is there. He helped me.Tell them Crystal Clear Solutions referred you. I don't get anything from it but I'd like them to keep track of this. Let me know if they can help.

    You can get a little more info at www.homemadeliquidnitrogen.com/PSA

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  • imsmooth commented on imsmooth's instructable Induction Heater 12 KW7 months ago
    Induction Heater 12 KW

    The sensor gives a reading of the AC current waveform that drives the coupling transformer connected to the RLC tank (the part with the Celem capacitor and work coil). This is not necessary to get the circuit to work: it provides information on the proper function of the system. Knowing this, I attached a diode and smoothing capacitor to a DC ammeter to get a constant analogue reading of the current. This is important, because if the current gets too high I know I will overheat the mosfet switches. For the smaller circuit this was about 20A; for the 10kw units this was about 50-60A for short periods. I used a voltage divider to feed the current value into the uProcessor and wrote a subroutine that constantly monitored the current. If it got too high I detuned the circuit to reduce ...

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    The sensor gives a reading of the AC current waveform that drives the coupling transformer connected to the RLC tank (the part with the Celem capacitor and work coil). This is not necessary to get the circuit to work: it provides information on the proper function of the system. Knowing this, I attached a diode and smoothing capacitor to a DC ammeter to get a constant analogue reading of the current. This is important, because if the current gets too high I know I will overheat the mosfet switches. For the smaller circuit this was about 20A; for the 10kw units this was about 50-60A for short periods. I used a voltage divider to feed the current value into the uProcessor and wrote a subroutine that constantly monitored the current. If it got too high I detuned the circuit to reduce the current. This is useful if the workpiece falls out of the coil. When this happens the current shoots up without anything to quench the tank. Having this feedback I could quickly reduce the current and protect the mosfets. I was thinking of producing a second generation board that would also get input from a thermocouple connected to the mosfets and would shut the system down if the temperature got too high. I never did it as I sold my project to a blacksmith.I hope this helps. You can go to my site http://inductionheatetutorial.com for a little more information.

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  • imsmooth commented on imsmooth's instructable Induction Heater 12 KW8 months ago
    Induction Heater 12 KW

    If you look at this schematic from my tutorial websitehttp://inductionheatertutorial.com/inductionheater...the sensing transformer is there on the right side.

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  • imsmooth commented on imsmooth's instructable Homemade liquid nitrogen generator1 year ago
    Homemade liquid nitrogen generator

    You can get a better idea of the parts and cost at my tutorial website:http://homemadeliquidnitrogen.com

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  • imsmooth commented on imsmooth's instructable Nitrogen gas generator1 year ago
    Nitrogen gas generator

    Very nice. I built my analyzer. However, I got the O2 electrode from an anesthesia machine. You will have to find that part. The rest just involved building a circuit that could sense the voltage generated by the electrode and convert that to a value between 0 and 100.

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