My printer port is weak and moving when cable is jiggled…
what can i do to glue this port onto the circuit board?

I want to trace the connections and the components of a circuit and draw it in Orcad but the wiring is hard to trace, is there a book or a tutorial that I can read that will help me read PCBs

I have a air purifier for little over a year and it stopped working. I cleaned the filter, and it still persists to not work. The button lights up dimly for a second when I turn it on but that is as far as it goes. My diagnose was to check the circuit board for a blown fuse or something else burnt, but I am not sure what to look for exactly. Can anyone help me figure out what I should look for?

I’m still a bit new to soldering..but i’m looking for a handy tool that will do me best (not a razor blade etc) that will do a clean job in cutting the track on a circuit board. thanks in advance

I’m selling an Xbox 360 DVD drive and the potential buyer would like to know the circuit board number, however, I’m not too sure where to find this.

My drive was manufactured by Hitachi-LG in November 2006.

Referring to Fig 1 at http://i211.photobucket.com/albums/bb264/shayanr/questions/99.jpg?t=1261035335.

A lowpass butterworth filter is required with frequency response within shaded areas. Find minimum required order of filter n and it’s 3dB bandwidth B. For numerical calculations assume the following values: a1=-.2dB @ f1=10kHz, a2=-20dB @ f2=30kHz, confirm filter satisfies the requirements.

please im beginner about electronic .Do you know any good site or book for beginner guide about elctronic?

and please tell me how to create circuit board?

in electronic circuits