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Great question, @fishbrine ! Yes, it's possible for the external switch to become jostled and turn on accidentally. That's the reason why the original switch - which is still the default option - is located under the lid. I have been reluctant to offer this option until now because an external...

Fixed. Thanks for the heads up!

Finally posted the new features video! also cleaned up the www.fluxerheaters.com web site a bit. Let me know what you think! :brow: Cheers, :leaf:

I would recommend picking up a harder case for it. Something like this is good: Digital Camera Case for Canon... https://www.amazon.com/dp/B07DYHBNDS?ref=ppx_pop_mob_ap_share There are pics of the FD in this same case earlier in the thread. Other cases may be good fits as well, but this one is...

Fantastic! Very glad to hear your heater is working well, @Jethro ! There's no issue with leaving it on all day or overnight - I do it all the time by accident - but the LED does use a small amount of power (20mA), and it will eventually run the battery down. The next version of the Flux...

Hi all, Just a brief (?) update to say that the new MOSFET solution I discussed last week has passed all of the tests I have come up with so far, including several situations that caused the previous MOSFETs to fail a high percentage of the time. :tup: I installed the new LR7843 chip on...

Sorry your Pyrex button fell off, @Gray Area. Here are some suggestions: This stuff is food safe, with decent adhesion...

Part 2: A new Chip in the House Now, prior to switching to the NVD5890N, I was using a different chip in my IH builds: the LR7843. This is an excerpt from the LR7843's datasheet. I have circled its power dissipation spec in red: "Maximum Power Dissipation: 140W" :cheers: Why, hello old...

It's time for a triple popcorn Fluxer update - an update so wordy I needed to split it into two parts. :popcorn::popcorn::popcorn: In the next two posts, the Flux Deluxe's MOSFET saga takes a few extra twists and turns - and my write up is extra wordy, too - but I finally (!) determine a true...

Hi, I am trying to make sure the heaters work as expected. Please see this post for the most recent news: http://fuckcombustion.com/threads/fluxerheaters-com-new-induction-heaters-for-dynavap.33573/page-43#post-1382695 The newly revised PCBs that I need to make repairs are finally shipping...

Hi, and thanks for your post. I am using NVD5890NL MOSFETs; link to datasheet. They have an RdsON of 3.7 mOhms @ 10 V, 5.5 mOhms @ 4.5 V. My Gate voltages are consistently high - most recent oscilloscope graphs show that my heater MOSFET Gate voltage remains >7.5V throughout a heating cycle. I...

The MOSFETs are getting hot because a LOT of power is running through them, generating a lot of heat, and that heat is concentrated directly underneath the MOSFETS. The design to this point did not consider this and didn’t provide any additional mechanism for spreading or dissipating that heat...

Hi all, Time for another update. :popcorn: MOSFET issues: Like a good mystery story, it seems that there's been more than one MOSFET killer lurking in the Flux Deluxe's circuit board design. :ninja: I've spent the last 2.5 months focused on taming the electrical aspects of this heater...

Thanks for the question, @testymctest . It is a head scratcher. :hmm: I have some ideas, but unfortunately these things don't write log files that explain why they failed, etc. So my post-mortem analysis involves a mix of forensics and guesswork. In general, the heater MOSFETs are the most...

Thanks, @LongDraw! WRT your last point, I may be funding this like it's a vanity project, but I would love to sell a bunch of these once I can stabilize the design and improve reliability! A lot of people seem to want one, so we'll see what happens. :popcorn: Cheers!

Thanks, @Moses Baca ! I would truly like to find the right solution and shut the book on this issue, so I can get back to making heaters instead of studying their faults. The current fix does exactly what I want it to do from a voltage suppression standpoint, so I'm now on the hunt for negative...

Hi folks, back with another update. It's what I do these days. ;) I'm feeling more confident that this current TVS fix is the right one - it's been very stable so far. Of course, I've said that several times before and been proven wrong every time (to this point), so we will have to see what...

Guilty. Sorry. I only have so much bandwidth, and have been giving priority to existing customers and to troubleshooting/engineering a solution for the recent spate of MOSFET and diode issues; see the last 10 pages of this thread for more info on that effort. If you are an existing customer and...

Yes. The battery protectors have been hand made up to this point, but I recently realized I could think of them as an unpopulated PCBs, and draw them up on the computer instead. So I did that, and the first batch of those arrived a few weeks ago. I have been using them on repairs but have been...

Hi all, It might be time to make some more popcorn, lol. :popcorn: The new TVS diodes arrived, and they are looking pretty good! Test bed is a 14mm coiled FD, w/fresh batteries. These traces show the voltage on both heater MOSFET Gate pins, before the addition of the new TVS diodes. Each...