I found this out on youtube today, and thought I'd give it a try. The ingredients for the etching solution are White Vinegar, Hydrogen Peroxide (I used a 6% from the drug store) and Salt. It takes a while, but it gave GREAT RESULTS. Here's a pic of an arduino controlled (stand alone) main board for a pickup winder I'm building again (Just moved out of country).
Draw a polygon, Name it Gnd.
Quote from: CrossRoads on Mar 30, 2013, 12:00 amDraw a polygon, Name it Gnd.10:30 into the EagleCAD tutorial by Jeremy Blum he steps through how to do this (his tutorial page is here).Cheers ! Geoff
I have found another method for "tinning" the circuit board after etching. Here are the steps:1. Clean board thoroughly2. Brush flux on the copper surface3. Using a file and a "solder slug", file a small layer of solder dust onto the board4. With your soldering iron on high setting, rake it across the boardThis leaves a very thin layer of solder on the entire copper surface. this protects the board from oxidizing, and makes soldering the components easier. It also builds up thickness, which I'm sure enables the traces to handle higher currents?Plus it's a heck of alot cheaper than tinning solution, or electroplating.Cheers.
Lakes,Yes, solder paste works great, but this is a method for those who don't want to buy solder paste which is expensive and has a shelf life. I am just sharing some experiences for those who want to prototype on a dime. Tinnit works even better, but for the hobby builder, the price is a bit steep.I've had boards made professionally, I've done the photo-resist method, I've even made massive circuits on Vero Board ... etc.Here's my method with prices,1. Cheap Samsung monotone Laser Printer - $30 (I have found Samsung gives the option of darker toner)2. Circuit Boards from China - $12 for (10) 4" x 6" boards (be careful, alot of vendors send pitted cheap crap).3. White Vinegar - $14. Hydrogen Peroxide - $35. Solder - Hell, I don't know, I have a crap load.A note on the printer. I had both a Brother and a Samsung, and destroyed the Brother for parts. I found more parts than the printer was worth.Cheers Mate,