Electronics Forum / Electronics / June 2004

Do you need a schematic or wiring diagram for
your projects ? Then let me create you technical
drawings or schematics for you with Autocad software.
Good rates.  Just reply to the email below.

I need your help on the following issue.
I have to construct a  Class AB - push pull amplifier with MOSFET
Amplifier should be able to provide 21Watt output power (10.5
Watt RMS) at 8 ohm load (i.e speaker) .

I've got 4 data inputs going into a BCD to Decimal Decoder. Depending on the
inputs one of the corresponding outputs go high. I would like to add voice
to this. For example, if the output 6 goes high (input 0110), I would like a
voice announcement saying "The number selected is six" ...

Hiya all!
I have a device i wish to have made(one to start with and the possibility of
a couple more). It involves a pic16f88 and a few other compents. I am
wondering if anyone can give me a price on making it for me? Including all

Greetings Everyone!
I am trying to control 3 DC motors and a stepper motor. All of them
need to be biderctional. I use a 5 V supply for the motors. However i
am having a problem with the back emf. It burns out the

Hi all, wonder if anyone can suggest what is going on here.
I have a couple of electronic time switches, nice range of settings they
have too :-)  They use an internal battery to keep time when the mains
fails.

I have an embedded controller devboard and a piece of consumer
electronics with some flash memory containing buggy code. I would like
to hook up the flash memory (without removing it) to the adress/data
lines of the devboard and in this way non-intrusively read out the

   I want to measure the impedance or conductance of air. How can I achieve and what is the possible value of the impedance of the air?
   Thank you very much!
Wayne

Just a followon from my last message incase i cant get anyone to build it.
Just wondering if anyone can program a couple of 16F88 PIC's for me?
Thanks
Lindsay

MTU electronic engineer please help with p.c.b from main engine.
Thanks in advance
Sotiris Antoniou
Service Engineer.

hey all--
i have a 4 digit LED which has three pins broken off, as well as a
68HC11 board which has a transistor that broke off. in both cases, the
leads severed right at the edge of the package, so there's no wire

I want to combine two component video sources into a projector.
I could use a switch but since only one component video source will be
powered up at any one time could I buy 3 rca y female splitters and combine
the 2 sets of component cables into one output.

Just a followon from my last message incase i cant get anyone to build it.
Just wondering if anyone knows where i can get a couple of SN75176 (im not
exactly sure what they are)
Thanks

I am thinking of puting up a TV antenna that will be inside some foilage
like tree leaves and small branches.  Will this affect the antenna's
reception?
Jon

Can I charged NiCad batteries in NiMH chargers? how about rechargeable
alkalines?