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Logic Gates with NPN transistors
I doubled up on everything apart from the peroxide, which I used 50ml of as it was 12%. It certainly looks like ferric chloride :D
Stop using Ferric Chloride etchant! (A better etching solution.)
Two sided PCB using toner method
Make Ferric Chloride (for etching printed circuit boards)
DIY Customized Circuit Board (PCB Making)
DIY Printed circuit board
How to bind your own Hardback Book
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