Electronics Forum / Electronics / October 2004

Does anybody know what are the drawbacks of using a paper phenolic
based pcb on a simple circuit design?

What is the difference between the sleeve & ball bearings fan?
Which is better in terms of price, life extand & noise level?
Its for motherboad chipset fan.
Thanks in advance

Please could someone tell me whether it is better to run a portable
music player like MiniDisc or CD Walkman with rechargeable batteries
or non-rechargeables?
I get the feeling that these gadgets are a mite too voltage sensitive

Can anybody recommend a good, fairly readable textbook concerning
solid-state physics/electronic devices.
I have a good microelectronics book, but it doesn't include any theory about
how and why diodes, BPJs, etc. work the way they do.

I have a switch-mode powersupply unit that's injecting a high-frequency
ringing onto the input power rails (which is from a battery).  Does anyone
have any ideas how to stop this?  Would a simple diode and capacitor work?
Or an inducer?  In which case, how do I chose the value of ...

I'm French electronic student, I need some informations about airborne
communications and data management solutions to airlines.
I need also technicals documentations aviation electronics systems,
electromagnetic compatibility, transmissions capacities.

Where can I find Zip-linq products?
Someone told me thay are at www.ideliverit.com/ziplinq.asp
Is this right?

How's it played? The game is very simple to play. You just round up anywhere
from 2-4 victims and each grab a joystick. When you hit the start button in
the center of the game the red light will begin to flash and begin to play a
haunting music. When the right light turns green and ...

i am trying to source a replacement for this semiconductor used in
mitsubishi distributor ignitors. its used to fire the coil.
its marked M67580  but i can find no refernce to it on the mitsubishi
website.

I have a photographic flash head that is only 18 months old but has stopped
working, Could anybody point me to a repair shop in sydney that could
possibly fix it? It is an mains powered flash.
Thanks

This is really a Win98 question, so apologies if a bit OT.
I am playing with a circuit idea around my PIC 16C74/JW on my protoyping
board, debugging my software (or should that be firmware?) which will drive
my circuit. As I'm using PicBasic to create my program, there is a handy

This is a little out of my normal field so I am seeking some outside input.
I am working on a machine that has tow large steel bodies that are clamped
together and share a common clamping interface surface. The components are
located in a region of the machine that is inaccessible ...

Is there an independent website dedicated to /unbiased/ testing of
batteries?  Things like:
Total mAh
mA over time with load

I'm looking for a DTMF encoder IC. Not the decoder but the encoder IC.
Preferrably a binary input and speaker level output. Any ideas?
Cheers,
Phil

Does anyone know any devices (such as ion ray guns) that can push
metal away instead in your direction like an electromagnet?
any advice would be appriciated
thanks!