<html><body><div style="color:#000; background-color:#fff; font-family:verdana, helvetica, sans-serif;font-size:10pt"><div>So, I've bitten the bullet after lots of lurking on the list, and have initiated our first "dad and kids" electronics project (ok, it'll be vastly "dad with kids looking on")<br></div><div>We're going to make this metal detector: <a href="http://makeprojects.com/Project/Treasure-Finder/1113/1">http://makeprojects.com/Project/Treasure-Finder/1113/1</a></div><div><br></div><div>I'm just wondering how many of you have done PCB etching using the toner-transfer method.</div><div>After going through a bunch of youtube videos on the etching process, some of them mention the stinkyness/toxicity of the fumes from the acid bath. I bought FeCl3 etchant from Active, but now I'm thinking that maybe HCL+H202 would be better, as described here:</div><div><a
href="http://">http://www.instructables.com/id/Stop-using-Ferric-Chloride-etchant!--A-better-etc/</a><br></div><div><br></div><div>Regardless of etchant, though, in mid-winter, doing it in the garage is probably out of the question due to the cold (or is it?) but I assume I have to ventilate the heck out of whatever space we use.</div><div><br></div><div>any guidance on the etching process?</div><div><br></div><div>Next question: for this project, you need to tune the reference coil using either an oscilloscope or a frequency-counting multimeter. Does the Lab have either of these? Cuz I don't...</div><div><br></div><div>thanks in advance for any wisdom.<br></div><div><br></div><div>cheers,</div><div>Eric<br></div></div></body></html>