STEP PCB ETCHING
we design the circuit electronic stethoscope on express-PCB board
2)
express-PCB board
printer laser jet
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transparent paper
we print circuits Electronic stethoscope that have been made on express-PCB board by using transparent paper and used the printer laser jet.
3)
buy the PCB UV board. We cut PCB UV board to size demanded in circuit.
4)
5)
after used UV box. to remove the gold line is at PCB UV board. used the etched with a 220 g/l solution of ammonium peroxydisulfate (NH4)2S2O8 a.k.a. ammonium persulfate, 220 gram added to 1 liter of water and mix it until everything is dissolved. Theoretically it should be possible to etch slightly more than 60 grams of copper with 1 liter etching solution.Etching at ambient temperature might take over an hour, it is better to heat up the etching solvent to about 35-45 degrees Celcius. After an etching procedure it gradually becomes blue and more deeper blue - the chemical reaction creates dissolved copper sulfate CuSO4. Compared to other etching chemicals like hydrated iron (III) chloride FeCl3.6H2O a.k.a. ferric chloride or the combination of hydrochloric acid HCL and hydrogen peroxide H2O2, using ammonium peroxydisulfate is a clean and safe method.
lastly we get the circuit in etching PCB
I felt very happy while reading this site. This was really very informative site for me. I really liked it. This was really a cordial post. Thanks a lot!. best stethoscope for doctors
ReplyDeleteCan You please give me CAD file of the above pcb Circuit?
ReplyDeleteI have the same project and we're stuck. Just to align every hole with the components and Every component size..I want the layout on any cad document.
ReplyDelete