To improve the accessibility, it would be super cool if at least one version of the design could be prefabbed by JLCPCB using SMD components, so people can get away with minimal to no soldering.
diy
Finally, a comm for that one user who hand-makes longbows. This ones for you, comrade.
I love this, I haven't worked with them before but I'm big into it
I'm designing to only use super common components, I'm hoping I can get away with more or less just a boost converter I haven't shopped for yet, an LM317, and an LM324 (minus an MCU which I'll make a call on eventually), so that availability, cost, and total IC count are lower, which should drive the cost of assembly down with external assemblers too. I'll look into JLCPCB
A friend designed an ergo keyboard such that many of the components could be soldered on by JLCPCB, and it was definitely more expensive than full DIY but not too pricy ($86 for ten PCBs with all components soldered on vs like $15 for bare PCBs). I think he just picked components that were in JLC's catalog, but lmk if you have questions and I can check if he has answers.
I actually do have a question, I was going with this plan but getting frustrated at seeing all of the components that weren't in stock - do they restock pretty quick as soon as you order, or do you need to design for only things that are in stock? Thank you!
Yβknow I actually have no idea. I think you just have to wait until components are in stock to order, but maybe they can place your order and just wait for back ordered components? For the keeb, everything was in stock when we ordered.
in your endeavors.
I wonder if e-cig design can be rejigged into high voltage/low amp design, it does everything else
now just need an auto-targeting system so that my shakey hands dont result in a giant gash. auto-targeting electric needles also sounds like some sort of terror device
We should put this "electrolysis machine" on a quadcopter, just to see what would happen.
Would probably bump the cost up a bit, but I feel like some tiny surface scan that adjusts the needle point would be possible.
Or maybe following the hair in? Idk
First off, this is rad as fuck. Second off, I'm down to help in any way that I can. The most applicable skills I have for this project would be my hobby level experience with low volt electronics, 3d printing, and 3d modeling.
hi and thank you for your interest <3
At some point down the line I'm gonna want to put it in an enclosure, you'd be perfect for that! I'm gonna post my working circuit diagram tonight if you wanna build along and poke at it, but I'm at the stage where it takes like 3 multimeters and 2 benchtop supplies to test if the thing works so I'm mostly working in SPICE. once I'm more confident and have an actual design that people can like, make, I would def love people to buy a PCB and a parts list, test the build, and then maybe get some stress testing in! Stay tuned there's plenty for people to do that I just haven't articulated yet :meow-hug:
You probably know him already, but this sounds like something a portion of Zack Freedman's community might be interested in helping out on.
i love this sm
oh fuck yes stuff like this is becoming my new obsession ty for posting it can't wait to see this project come to fruition
i don't have any relevant expertise that isn't horribly rusty but i can serve as an excellent cheerleader!!
One thing I didn't lose in my transition is my audacity
Loved this bit <3
I had a few ideas off the top of my head that might be useful.
- Adam Savage's guide to wearable magnifiers
- For generating a wave, the PiFM project lets you use a first generation raspberry pi to transmit FM or AM from 0 - like 400 MHz at 5v, and all straight off an easy to attach to GPIO pin. Maybe you could fuck with the line voltage going into the pi a little, or use some kind of amp? Maybe even one of those cheap as dirt 8 watt Baofeng radios which can be hacked easily to cover a wide range of frequencies? From personal experience licking the antenna port stings quite a bit... :>
- For holding the needles, I'm having a hard time getting an idea of what size they are but would some kind of oscilloscope probe do it?
Particularly the little hook grabber ones?
hi I am one thousand percent ordering one of those wearable magnifiers, thank you so much! I'm avoiding RF anything until after I have a working galvanic 1.0 made, but these are interesting options because I'll need to do a lot of intensive power testing. Here's the best on the needle: https://synopticproducts.com/collections/f-shank/products/ballet-f2-f6-stainless-needles-probes-002-006?variant=40311120756817 /u/abbxrdy in the reddit post I linked noted that the shank fits perfectly into a D-sub crimp socket, which I might try to work with
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this is cool af
First and foremost, you are now my favorite human ever. I was just looking at electro costs today for the first time and crying cause Im unemployed and dont think ill ever be able to afford it. This would be such a game changer, it would literally change my life and access to care. You are a beautiful person for doing this
Ok gushing out of the way, I would love to contribute and help make this a reality, but dont really know how. I can write code (most relevant to this project, ive done a toy OS and bootloader in C), and am familiar with a handful of licenses. Ive also done basic home electronics (winding my own pickups, building and programming a mechanical keyboard, rewiring guitars, etc). Im also pretty ok at writing documentation and could do some latex magic to produce nice looking user and service manuals, as well as build instructions. But for the time being, I want to cheer you on!!! This project has made my day so much better just from the prospect of it existing, thank you
As far as the name goes, im unsure. But the mascot should be a hairless creature, like the sphynx cat or naked mole rat.
Thank you so much for beginning this project, it has serious impact and just reading this made my day far better and less distressing. You are a wonderful person!
Editing to add that perhaps you could consider something like sourcehut as a forge provider instead of github? With sourcehut anyone with an email address could contribute, and you could always mirror to github for visibility if you wanted.
I like the Sphynx idea! That's my tentative pick for a name! See my new post incoming today for more details!
I also checked out Sourcehut, they look like exactly what I'm looking for and I intend to get set up with them soon. Hosting projects is in their paid tier, but I think it's worth, they seem like good folks.
Shared this with a friend who makes gizmos for fun...
Yo dumb question but can you repurpose like sound cards or radio equipment as high frequency signal generators? I meanI get the voltages are gonna be too low but current might be adequate so you might even be able to avoid some issues with inductance/ringing that you get switching complex circuits at high frequency.
I'm a nobody though, there are probably huge issues I'm not seeing. Please nobody without electronics expertise try this.
Hmm 27 MHz is faster than anything designed for audio. Shame. not radio transmission though
CB radio operates around 27MHz, and the 10m amateur radio band is close, at 28MHz. With a legal power limit of 1.5 kilowatts (on the ham bands), there is a lot of high power equipment available (as well as low power, portable equipment). My HF transceiver can put 100 watts into an antenna at these frequencies. There are lots of schematics and kits (and likely off-the-shelf ICs) floating around for DIY transmitters as well. I imagine you woudn't need a whole tranceiver, but the circuitry to generate signals at these frequencies is a prerequisite to build any of these things.
This is what radio people refer to as "high frequency." The majority of modern radio equipment operates at even higher frequencies than this (VHF - "very" high frequency, UHF, "ultra" high frequency, microwave, etc).
I haven't devoted all that much energy to it (ha) but I was honestly just thinking of finding a high frequency opamp (they sell these way up to 50 MHz and higher) and just making an oscillator with all the impedance matching squared away, but definitely something I'm not the most comfy with. I also looked into CB and 10 MHz HAM transmitters (although I'm fairly sure 27 MHz is higher than most thermolysis happens at, I think 10 MHz or even lower should be fine)
I have limited experience with electronics beyond rando hobbiest with a pile of half complete projects. I do have a very dusty physics degree though so maybe slightly more able to contribute technically?
At any rate, I'd be keen to do what I can to help. This has both selfish and selfless appeal being a hairy slav trans woman. Plus I can feel my brain falling out of my ears with each passing day further from technical work.
Yeah sorry I meant radio equipment would work but audio wouldn't. Worth noting legal civvy bands vary with country and access to equipment has varying degrees of regulations (sniff, pirate radio seemed cool). Like in aussieland where I am you have to lock down firmware for any transmitter in phones.
Good to have proper info from a radio person though. Speaking of is amateur worth it? we get fires up here a lot and I wonder if it's a skill worth learning but the clubs are sausage fests
I built an iontophoresis machine recently, which is a fancy way of saying "15mA-ish constant current supply". Galvanic seems like the sort of thing you could do with
constant current source (lm317 gang) -> mosfet clamp to ground (controlled by whatever pulse generator you pick) -> electrode
I think you have the right idea with prefab boost converter. I have a little USB-to-9V adapter, this type which I use with a USB battery bank to power an oscilloscope. Might want to do something like that, commodity assemblies are your friend.
I've used JLCPCB before but not their assembly. If you don't get it assembled, check out https://pcbshopper.com/ in case someone else offers cheaper boards per area.
I'm not a professional EE but I'd happily review board. I also got helpful reviews from https://www.reddit.com/r/PrintedCircuitBoard/ in the past. Curious, is "multidisciplinary engineer" a real job making prototypes or are you just a specialized engineer who can also make prototypes on the side? Bc if it's a real job I want that please let me know how you got it.
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I'm curious about this and have mild engineering background
I absolutely love this project! Besides DIY and biohacking type stuff being cool as fuck, I think that once of the most useful and empowering things that trans people can do for each other is figuring out how to do medical stuff for ourselves / each other, instead of needing to rely on cis doctors.
I actually have tried to use DIY electrolysis on my face. This was when I has very early in transition. I was about to start estrogen, and had basically done nothing else. I really wanted to do something about my facial hair, and also knew that it was a pretty normal step to do around when you start hormones. But I didn't have that much money and I was afraid of coming out to anyone, so I didn't want to get any professional stuff done. I bought the One Touch unit (white plastic case, 9-volt batteries), a makeup mirror, and some tweezers. I read a bunch of old guides on how to do it, and decided to do a test patch. I ended up targeting just the hairs on my lower lip, and removed them all over the course of like 2 sessions. Then I waited for a while to see if they would grow back. Unfortunately, most of them did grow back. I found that really demoralizing after all the work to remove the hair in the first place, and I basically gave up. Since then, I've gotten professional laser and electro. It would have saved me a lot of time and money if the DIY version had been easier.
I think that one of my problems was not leaving the probe in my follicle for long enough. Those home units are Galvanic, which to my understanding means that it needs some time in your flesh to really kill the hair. The One Touch makes a tone once you've held the probe in for a couple of seconds, so I would always remove it after that. I think I actually needed to wait longer and the tone was annoying and useless. Also, I now realize that some regrowth with electrolysis is normal, because you can only kill hairs in a certain growth phase.
For your project, I think you want to really pay attention to the user experience and interface of the thing. Ideally, you should make it difficult to use incorrectly, and easy to use correctly. Maybe timers on the unit that show how long to hold the probe in? Maybe a little counter that ticks up when you've done a hair? Maybe a battery strength indicator so you know when to recharge? Anyway I'm super interested in this project and would love to hear more updates. I don't know much about electronics, but if you need any software I'm happy to help.
Your experience is super valuable here, I'm so happy someone who's actually used the One Touch units has stopped in! Given they're the only somewhat viable solution I know of for at home electrolysis, I would love to have you around for asking questions to!
Ergonomics wise, you have some really good points, I like the idea of a audio beep when each hair is done and I hadn't thought of it yet so I'll try to roll that in somehow! I'm definitely aiming for hard to use incorrectly/easy to use correctly. Screens, even 7-segments, require an additional layer of circuit complexity that I might not implement in a 1.0 design, but it's a possibility! I'm much more likely to just use status lights for now.
I've heard this experience a lot, where using the One Touch leads to almost complete regrowth. I suspect that the One Touch uses an unboosted 9V, which is on the very low side - I plan to be able to drive up to around 22 volts, which I believe is the main factor of why the One Touch was largely ineffective. At that low of a voltage, from my understanding of units of lye, and especially if the probe isn't sourcing very much current because of the circuit design or if your skin is highly resistive, it'd take over fifteen seconds per hair to have a high likelihood of killing the hair. I've also heard a lot about the One Touch needle probe being too thick to reach the depth of the hair bulb without pain and potential for scarring, further reducing the odds of successfully killing the hair - that's the advantage of designing around the Ballet needles I have linked in the post, but they're more expensive so there's a flipside as well.
by the way, do you want me to add you to the tag list? As I get more development done I'll probably have lots more ergonomics questions and I'd love to tag you for them!
This sounds very cool and I would love to make one. Unfortunately I don't think I can help in any way but cheering you on, so you go girl!
I had this insane idea recently of using the sparker from a torch lighter and some thin copper wire. I am terrified to try it out + itβs hard to DIY even with a fucking mirror.
Would make for one helluva bit though.
dont do this please... it will not end well.
This is surely a bit indeed lmao
The mechanism of action of both galvanic electrolysis and scar tissue formation is dependent on the total quantity of electrons, or current over time, so piezo sparkers, with their very high voltage and very, verrrry low current will definitely not do anything. I think what you'll get is that it'll be more painful than getting zapped normally plus you're at risk of jabbing yourself as you jerk around from getting shocked with a delicately placed needle on you. So tl;dr, probably don't do this π
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This feels super unsafe but I am looking in interest
Honestly there are very legitimate safety concerns here, my goal is to make a product that is at least as safe or safer than the widely marketed One Touch units, including hard wired limits on voltage, current, and time of exposure, while also writing a manual that makes its operation hard to screw up as well, and then of course including every possible disclaimer. I very much look forward to safety audits of my shit as soon as I have something that looks like a minimum viable product!
Id love to help with this!