- Old Solderhand
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Peroxyde "sees" two reactants: chloride ions (from the chlorhydric acid) and copper. The values in the tables indicates that the copper reaction is done far more easily than the chloride one, which is good for us (peroxyde will mostly interact with copper). The green color appearing is due to copper chloride...
BUT the chloride reaction happens at all times, and produce chlorine gas, which is extremely harmful. So I haven't tested it yet, but do prepare your etchant short before etching, and don't leave it around you when the PCB is removed, cause it will continue. The two reactions need protons (H+ = acidity), so if you spill your etchant in a big bucket of water, pH will rise to almost 7, and these H+ ions won't be enough to let the reaction happening fastly... I bet the quantities of copper chloride produces aren't big, but I still have to look if it's not too bad for environment...
I hope this helps and avoids intoxications, event if it's off topic
Be safe, fellas!
Bump for a great question.....soulsonic wrote:I've used ExpressPCB before. They are very high quality boards; but I do not like their layout program. Since I've started using Eagle, I don't want to use anything else.
I've asked this before, but I'm going to ask again; has anyone tried Futurlec for boards? They say that they accept Eagle .brd files directly without the need to export; that's great for a pcb noob like me, and their prices are dirt cheap.
I've had good luck ordering parts from these guys, but I'd also like to hear if anyone has had experience with their board service. Seems really cheap, like under $40US for 6 single sided boards. May have to try this. Heh, as soon as my Eagle skills get a bit better.
- Old Solderhand
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- Joined: 18 Apr 2008, 12:33
- my favorite amplifier: my jansen bassman 50
rebote 2.5; supreaux; odie; heartthrob tremolo; ross phaser; dr. boogey; thor; baja black toast; slow gear attack, rebote, tri-vibe, small clone, little angel, magnus modulus, echo base, hex fuzz, big muff, 22/7.
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I hear ya.. goes for male dogs too... how the hell? brown patches of death all over the lawn.uncleboko wrote:Judging by what it does to our grass, female dog urine should be good!
Ronsonic wrote:...the lower the stakes the more vicious the combat.
atreidesheir wrote:He should be punched in the vagina.
- Diode Debunker
- Posts: 916
- Joined: 11 Mar 2008, 23:56
Completed builds :
MXR MicroAmp in a volume pedal
TubeDriver (w/ NoS russian tube and big muff tone contol) + Phase 45 (w/ univibe cap ratio)
Dallas Rangemaster (w/ noisy OC75, negative ground)
SubCaster tube booster (w/ NoS russian tube, PtP)
Music From Outer Space SubCommander in progress
Crackle Not OK
Simple bass blender in a 1590A
Bazz Fuss with a photo-darlington
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http://www.instructables.com/id/Sponge- ... ircuit-Bo/
It's so simple, i don't understand why it's not widely used.
But i'm thinking right now at a small improvement for the ferric-chloride impregnated sponge : why not use a foam paint brush (with a convenient handle), or better still, a foam paint roller ?
You'll just need a shallow plastic tray or plate, tape the toner-enabled PCB in it, and gently roll the etchant-impregnated foam roller over. No need for gloves, little risk of splashing/spilling etchant, little risk of damaging the toner as you don't scrub it, just let the roller dry until next time ...
I'll try that the next time i etch a board !
- Old Solderhand
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my favorite amplifier
Traynor YBA-III, Fender Super Six
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i built myself a heated, aerated etching tank, and that thing rocks. but if i want to do a single board quick, i'll probably go back to this method.
- Mr. G.
- Resistor Ronker
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- Joined: 03 Jul 2008, 20:32
- my favorite amplifier: Undecided
3-loop + tuner out TB loop pedal
Eternity overdrive (Deaj perf layout)
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