The ferric chloride is a salt, used mainly in electronics for etching printed circuit boards.
As all fans of electronic DIY know his ability to "eat" the copper slowly runs out, we see how ravvirare solution.
2008 15 November 2008
Test the serial port - RS232 Loopback
To test the functionality of a serial port you need to "cap" to be applied to the door to verify the functionality, the actual test you can use Hyperterminal, but I recommend a simple and more practical alternative
In addition to the various commercial products with a minimum of manual dexterity is possible to realize, this is the pattern:
