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In-line headphone amplifier
Musical Greeting Card
9V battery case for projects
Power light for Glue Gun
Water proofed temperature sensor
USB Li-ion battery charger
Salvage surface mount components
Op-amp headphone amplifier
Wireless L E D
Switch mode LED torch
I have noticed , this is only good where the copper is single plane, what about parts separated. also some copper is not etched and left as a dust of board.I experimented and found these steps to work for me:I etched pcb in 2 steps,Step 1: etch away all major copper via salt water electrolysis. Step 2: etch remaining copper dust via hot Vinegar+hydrogen per oxide + salt water
Also you can easily create virtual COM ports using software solution, like Virtual Serial Port Driver (http://www.eltima.com/products/virtual-com-port/). You won't see the difference between real and virtual serial ports, because virtual serial ports are absolutely the same copies of real ones.
Why not give a clean schematic?
The Saltwater etch process
The serial port - software setup
Twin jet paper airplane
5V stabilised supply for USB hub
Can voice recordings be done...say I want the words ' warning!' To be played repeatedly when switched on. Can it be done? Please help as I want to make something for instructables.
Don't throw solder away
Activate windows click here: www.acyberkey.com you can find the keys you want in a low price that you have never imagined.
4-1/2 digit panel meter
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