let's collaborate an energy efficient e-nail for DIY'ers

using induction and 2 rechargeable 9v's making it an 18v unit!

im thinking it could get away with 10-16 awg enameled wire inductor. i think a pancake coil on a hinge over the dabbing surface would be most efficient. when its hot just move the coil away.

2x irf540n heatsinked separately
2x torroidal RF chokes
2x unknown valued resistors
2x UF400x
some decent value of MKP capacitors iv got a few 250nF i think.


it should be able to heat up instantly and turn the nail into a useless peace of molten metal if left on haha
so i think it should have a normally open switch connected to power to engage.

batteries should be able to recharge without unplugging so i have to find some rechargeable 9v's and make an 18v charger circuit or buy a power cord. im no good at wireless charging circuits so idk.

lets get some help here

i grabbed this base circuit off google. i havent got a clue who designed it first but hats off to that guy. we'll bastardize it for you

Nice to see someone with decent taste. I think @Ceepea is into DIY induction as well.

How long would a build like that hold a charge?

eh itd probably depelete pretty quickly. maybe 10 minutes of total use. but it should get a nail red hot in less than 20 seconds. so itd theoretically be useful for a days use.

there will be a voltage spike on the MOSFETs so idk if irf540N is actually worth using since it can only handle 100v. i do like the 30A handling though.

hey ok so i got this thing working. kinda rough setup as im not forking out much in this "research stage". The induction coil works pretty well but as it turn out it wants to draw over 10 amps at around 9 volts. this is doable with a shit ton of 9v batteries in parallel but thatd be heavy. i also should get smaller heatsinks that are actually a pair. plus the coil should be water cooled through a radiator. all around i need better parts. but i can vouch for the above schematic at this point. i'm thinking of making this device would make the most sense portable but ill need to get creative on it's power supply.

ps more capacitance and bigger the inductor gives a higher frequency and thus more eddy currents per second and faster heating occurs. my nail never got flaming red hot like some videos i have seen but i also have these dinky capacitors versus what i have seen used by others. but non the less it gets hot enough to melt this HDPE doughnut.

if i went with my original idea of 18 volts, this coil would want to eat so much more current! id need a car battery for that....

oh wait.... lets see what happens with a car battery! hahaha oh boy live time toke'n'talk'science

nvm no go.
hhahahahahhahaha
exceeds the current rating for these IRF540N's lolololol

should have estimated this prior to hooking it up to a battery